Lab.gruppen PLM 20K44 User Manual

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PLM+ SERIES

Powered Loudspeaker Management™ System

PLM 20K44 PLM 12K44

Incorporating technologies from

Operation Manual

1. Important safety instructions

Before using the device, be sure to carefully read the Safety Instructions. Keep this document with the device at all times.

1. Read these instructions.

2. Keep these instructions

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including ampliers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If the provided plug does not t into your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11. Only use attachments/accessories specied by the manufacturer.

12. Use only with a cart, stand, tripod, bracket, or table specied by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13. Unplug this apparatus during lightning storms or when unused for long periods of time.

14. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

15. Use the mains plug to disconnect the appartus from the mains.

16. WARNING: To reduce the risk of re or electric shock, do not expose this apparatus to rain or moisture.

17. Do not expose this equipment to dripping or splashing and ensure that no objects lled with liquids, such as vases, are placed on the equipment.

18. The mains plug of the power supply cord shall remain readily operable.

19. Do not connect the unit’s output to any other voltage source such as battery, mains source, or power supply, regardless of whether the unit is turned on or off.

20. Do not remove the top (or bottom) cover. Removal of the cover will expose hazardous voltages. There are no user serviceable parts inside and removal may void the warranty.

21. An experienced user shall always supervise this professional audio equipment, especially if inexperienced adults or minors are using the equipment.

22. The US National Differences clause 16.3 requires that network cables must be ame rated VW-1.

1.1. Approvals

This equipment conforms to the requirements of the EMC Directive 2004/108/EC and the requirements of the Low Voltage Directive 2006/95/EC.

Standards applied: EMC Emission EN55103-1, E3 EMC Immunity EN55103-2, E3, with S/N below 1% at normal operation level. Electrical Safety EN60065, Class I

This equipment is tested and listed according to the U.S. safety standard ANSI/ UL 60065 and Canadian safety standard CSA C22.2 NO. 60065. Intertek made the tests and they are a Nationally Recognized Testing Laboratory (NRTL).

1.2. Warnings

1.2.1. Explanation of warning symbols

The lightning bolt triangle is used to alert the user to the presence of un-insulated “dangerous voltages” within the unit’s chassis that may be of sufcient magnitude to constitute a risk of electric shock to humans.

The exclamation point triangle is used to alert the user to presence of important operating and service instructions in the literature accompanying the product.

1.2.2. Warnings

To prevent electric shock do not remove top or bottom covers. No user serviceable parts inside, refer servicing to qualied service personnel. Français: À prévenir le choc électrique n’enlevez pas les couvercles. Il n’y a pas des parties serviceable à l’intérieur, tous reparations doit etre faire par personnel qualié seulment.

PLM+ SERIES Operation Manual rev 1.0.0

1. Important safety instructions

To completely disconnect this equipment from the AC mains, disconnect the power supply cord plug from the AC receptacle. The mains plug of the power supply cord shall remain readily operable. Français: Pour démonter complètement l’équipement de l’alimentation générale, démonter le câble d’alimentation de son réceptacle. La prise d’alimentation restera aisément fonctionnelle.

To reduce risk of re or electric shock, do not expose this apparatus to rain or moisture. Français: Pour réduire les risques d’incendie ou de choc électrique, n’exposez pas l’appareil à la pluie ou à l’humidité.

Do not expose this system/apparatus to dripping or splashing and ensure that no objects lled with liquids, such as vases, are placed on the apparatus. Français: N’exposez pas ce système/appareil au ruissellement ni aux éclaboussures et assurez-vous qu’aucun objet contenant du liquide tel qu’un vase n’est placé sur l’appareil.

This apparatus must be connected to a mains socket outlet with a protective earthing connection. Français: Cet appareil doit être raccordé à une prise secteur avec terre de protection.

The mains plug is used as a disconnect device and shall remain readily operable. Français: Lorsque la prise du réseau d’alimentation est utilisés comme dispositif de déconnexion, ce dispositif doit demeuré aisément accessible.

1.2.3. Caution

To reduce the risk of  re or electric shock, do not remove screws. No user-serviceable parts inside. Refer servicing to qualied service personnel. Français: Pour réduire le risque d’incendie ou de choc électrique, ne pas retirer les vis. Aucune pièce réparable par l’utilisateur. Coner l’entretien àpersonnel qualié.

1.2.4. User responsibility

Mains connection grounding

Your amplier must be connected to a grounded socket outlet.

Speaker output hazard on ampliﬁers

Ampliers are capable of producing hazardous output voltages. To avoid electrical shock, do not touch any exposed speaker wiring while the amplier is operating. The external wiring connected to the speaker terminals shall be installed by a qualied person, or ready-made leads or cords of appropriate capacity shall be used.

As the power output channels on ampliers produce high voltage, do not connect or disconnect speaker cables when the mains power is on.

Radio interference

A sample of this product has been tested and complies with the limits for the European Electro Magnetic Compatibility (EMC) directive. This equipment has also been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference from electrical equipment. This product uses radio frequency energy and if not used or installed in accordance with these operating instructions, may cause interference to other equipment, such as radio receivers.

This Class A digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.

However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment on and off, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the antenna.

• Increase the separation between the equipment and re c ei ver.

• Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.

• Check if the affected unit complies with the EMC limits for immunity, (CE-labeled). If not, address the problem with the manufacturer or supplier. All electrical products sold in the EC must be approved for immunity against electromagnetic elds, high voltage ashes, and radio interference.

• Consult the dealer or an experienced radio/TV technician for help.

Speaker damage

Amplier apparatus is very powerful and can be potentially dangerous to both loudspeakers and humans alike. Many loudspeakers can be easily damaged or destroyed by overpowering them. Always check the speaker’s continuous and peak power capabilities. Although the ampliers attenuators can be used to reduce the overall gain, an increase of the input signal can result in full output power, which may cause damage to connected speakers.

Maintenance

For safe and reliable operation, the dust  lters on both sides of the front panel, behind the grilles, should be removed and cleaned regularly to ensure maximum airow through the device.

If the dust lters are not maintained there will be safety risks; for example, high internal temperatures could ignite the dust and start a re. There is also a risk that the unit will malfunction since it is dependent on constant airow from front to rear. If the dust  lters are not clean and the unit malfunctions, any resulting problems will not be covered by the warranty.

PLM+ SERIES Operation Manual rev 1.0.0

Table of Contents

1. Important safety instructions 2

1.1. Approvals

1.2. Warnings

2. Introduction 6

2.1. Welcome

2.2. Main Features

2.3. Additional Documentation

3. Installation 8

3.1. Unpacking

3.2. Mounting

3.3. Cooling

3.4. Operating Voltage

3.5. Grounding

 2

 6

 8

 10

 11

4. Product Overview 12

4.1. Front Panel Overview

4.2. Rear panel

 14

 12

5. Operation and performance 16

5.1. Operation precautions

5.2. Power Output Performance

5.3. Amplier and Load Protection Systems

5.4. Power Supply

 24

 16

 18

6. Signal Flow and Lake® Processing 25

6.1. Signal Flow

6.2. Level Adjustments & Mute Points

6.3. Lake Processing and Control

6.4. Modules and Frames

6.5. Loudspeaker Processor Overview

6.6. Files and Presets

 25

 26

 27

 28

7. Front Panel Interface 29

7.1. Overview

7.2. Front Panel Key Lock

7.3. Power Button

7.4. Mute Enable Button

 29

 30

 31

PLM+ SERIES Operation Manual rev 1.0.0

Table of Contents

7.5. Meter Button  31

7.6. Menu Button

7.7. Exit Button

7.8. Dynamic Buttons, Controls and LEDs

7.9. Warning and Fault Indications

7.10. Meter Mode

7.11. Menu Mode

8. Back Panel Interface 57

8.1. Speaker Outputs

8.2. Analog Inputs

8.3. AES3 Digital I/O

8.4. RJ45 etherCON Network Connections

8.5. Power Inlet

 31

 32

 37  39  43

 57

 60

 62

 64

9. Appendix 65

9.1. Faults and Warnings Overview

9.2. Maintenance

 68

9.3. Factory Default Settings

9.4. Current Draw and Thermal Dissipation Specications

9.5. Glossary of Terms, Acronyms and Abbreviations

 65

 68

 70

 72

10. Application Guide 74

10.1. Rack I/O Panels

10.2. Power Distribution

10.3. Gain Structure

10.4. Gain / Level Optimization

10.5. Speaker Congurations

10.6. Digital Audio Connections

10.7. Digital Clock Conguration

 74

 75

 77

 80

 83

11. Technical Specications 85

12. Warranty and Support 87

12.1. General

12.2. International Warranties

12.3. Technical Assistance and Service

 87

PLM+ SERIES Operation Manual rev 1.0.0

2. Introduction

2.1. Welcome

Thank you for choosing the Lab.gruppen PLM+ Series of Powered Loudspeaker Management systems for your sound reinforcement needs. We are condent that you will be pleased with the performance, unique features, conguration exibility, reliability, and long-term durability offered by this product.

For fast installation and use of this product, your welcome package includes a printed copy of the PLM+ Series Quick Start Guide which contains the information required to safely install the product and place it in service. Control and editing features are accessible via the front panel interface or via the included Lake Controller software.

It is recommended that the Quick Start Guide and all product documentation on the included USB key is reviewed to ensure familiarity with the various conguration and control options.

Thank you again for placing your condence in Lab.gruppen products.

2.2. Main Features

The PLM+ Series incorporates a number of sophisticated technologies to ensure the best possible performance and many years of reliable operation. The following section summarizes the benets of each feature; additional information is available in the reference manuals.

2.2.1. Ampliﬁer Platform

The PLM+ Series power output section has expanded upon Lab.gruppen’s robust, road-proven PLM 20000Q amplier. Features common to both platforms include extraordinary power density; 4 channels of patented Class TD® output stages, a Power Factor Corrected (PFC), Regulated Switch Mode Power Supply (R.SMPS™), the high-efciency Intercooler® copper-nned cooling system, and a full suite of protection features, including the Breaker Emulation Limiter (BEL). Signal inputs are analog, AES digital, and Dante digital audio network.

2.2.2. Ampliﬁer DSP (Digital Signal Processor)

Various features of PLM+ Series devices are controlled by the on-board DSP, some of which are summarized in this section.

2.2.2.1. Input Gain (Sensitivity)

Input gain (sensitivity) is set in the digital domain for PLM+ Series devices, and may be controlled via the Lake Controller software or front-panel interface.

PLM+ SERIES Operation Manual rev 1.0.0

2. Introduction

2.2.2.2. ISVPL™

The Inter-Sample Voltage Peak Limiter (ISVPL) tailors each power output to the characteristics of the connected load. Please refer to section 5.3.1 for further information.

2.2.2.3. Load Veriﬁcation & Performance Monitoring

A comprehensive set of proprietary DSP-based tools are provided for load verication and real-time performance monitoring. These functions utilize LoadLibrary, a comprehensive database for each loudspeaker component of the connected load (usually one or more band-limited drivers in a multi-way system).

Using this data and a brief test signal, LoadSmart compares actual response to predicted response, identifying any malfunctioning components or connection errors. During the performance, PLM+ monitors real-time voltage, current draw, and temperatures of the PLM+ amplier stages as well as the power supply. This allows operators to avoid power compression and identify potential problems.

Please refer to the Lake Controller Operation Manual for detailed information on PLM+ Series load verication and real-time performance monitoring functionality.

2.2.3. Lake Processing and Controller

PLM+ Series devices integrate seamlessly into the Lake Processing environment and are accessible via the Lake Controller software. Processing modules offer precise settings for gain, delay, crossover settings, equalization and limiting. Lake processing features incorporated in each module include Raised Cosine Equalization™, linear phase crossovers, and LimiterMax™ loudspeaker protection. Please refer to the Lake Controller Operation Manual for further information.

2.2.4. Analyzer Plug-in

Lake Controller software provides integration with third-party real-time analyzers, providing simultaneous measurement display and EQ adjustment via the Lake Controller. Approved analyzers include Rational Acoustics Smaart 7, SysTune from AMFG, and WaveCapture Live-Capture Light or Live-Capture Pro; additional third-party analyzers may be approved in the future.

Please refer to the Lake Controller Operation Manual for further information regarding the Analyzer plug-in and associated functionality.

2.2.5. Dante™ Audio Network

PLM+ Series devices include Dante digital audio networking as standard. Utilizing the latest advances in Ethernet technology, Dante offers simplied system conguration and extremely low latency while delivering very high quality uncompressed digital audio across the Lake network. The Zen™ automatic conguration feature enables plugand-play setup without third-party DHCP or DNS servers. Dante is compatible with high-bandwidth networks, allowing large numbers of audio channels to be distributed alongside control and analyzer data.

PLM+ SERIES Operation Manual rev 1.0.0

3. Installation

2.3. Additional Documentation

This document, the PLM+ Operation Manual, serves as the primary reference source for detailed information on the installation and operation of PLM+ Series Powered Loudspeaker Management systems. It also provides detailed information on set-up and conguration using the front-panel interface.

If you intend to use the device as part of a networked system, or access features via the Lake Controller, please refer to the various supporting documents which can be located via these methods:

• Start > Programs > Lake Controller > Documentation (after installing Lake Controller software)

• On the included installer USB key, or via the downloaded software installer

• Online at: http://labgruppen.com/products/documentation/

3. Installation

3.1. Unpacking

Carefully open the shipping carton and check for any damage to the device or the supplied accessories. Every Lab.gruppen product is tested and inspected before leaving the factory and should arrive in perfect condition. If any damage is discovered, please notify the shipping company immediately. Only the consignee may initiate a claim with the carrier or their insurers for damage incurred during shipping. Save the carton and packing materials for the carrier’s inspection.

In addition to the PLM+ Series device, the shipping carton includes the following items:

• PLM+ Series Quick Start & Field Reference Guide

• AC mains lead (power cable) with Neutrik® powerCON® connector

• Rear brackets for additional rack support (pair) along with associated mounting hardware

• Software Installer and Documentation USB key

Please keep the original carton and associated packaging to facilitate shipping of the device should the need arise.

3.2. Mounting

Airow for cooling the device is from front panel (intake) to rear panel (exit). Please ensure that no objects, such as rack doors or lids, are placed at the front or rear of the rack to ensure that airow is maximized. This device has no top or bottom vents and therefore PLM+ units may be stacked directly on top of each other.

Sufcient space should be available at the front of the rack to accommodate the handles, and at the rear to accommodate connectors and cables; allowance must be made for cable or loom bends within a rack.

PLM+ SERIES Operation Manual rev 1.0.0

3. Installation

3.2.1. Rear Mounting

Two rear support brackets along with associated mounting hardware are included with the PLM+, as shown in Figure 3.1; it is recommended that these are used wherever possible. Fit the brackets to the vertical rails at the rear of the rack. Figure 3.2 and Figure 3.3 show the tting options for xed and removable installation.

The support brackets are reversible and may be tted to point either to the front or rear of the rack; the orientation used depends on the rack depth and position of the rear rack rails.

Two mounting methods are possible; note that the method shown in Figure 3.2 additionally provides extra security against unauthorized removal. For situations where rapid removal and replacement is required, the method shown in Figure 3.3 should be used.

Fig 3.1: Rear support bracket with mounting hardware

Fig 3.2: Rear support bracket mounted for Fig 3.3: Rear support bracket mounted for xed installation and bracket pointing forward removable installation and bracket pointing back

PLM+ SERIES Operation Manual rev 1.0.0

3. Installation

3.3. Cooling

3.3.1. Overview

The PLM+ Series devices use a forced-air cooling system with airow from front to rear, allowing high continuous power levels without thermal problems. Front-to-rear airow is preferable as air at the front of a rack is cooler than that at the rear in nearly all situations; never attempt to reverse the airow. The operation of the PLM+’s cooling system is dependent on front-to-rear airow; it will not function effectively with external airow in the opposite direction.

Make sure an adequate air supply is provided in front of the PLM+, and that the rear of the PLM+ has sufcient space to allow air to escape. If the PLM+ is rack-mounted, never operate the unit with any front or rear rack doors or covers in position. It is recommended to keep the ambient temperature around the PLM+ as cool as possible. An increased temperature can have a signicant negative impact on the expected lifetime on the components inside the PLM+.

Note: Fit solid blanks (not ventilation blanks) to unused rack spaces to ensure effective air circulation. Leaving gaps in between items of equipment degrades the effectiveness of forced-air cooling.

If installing one or more PLM+ Series devices in a rack with other fan-cooled equipment, be sure that all the other equipment also uses front-to-rear airow for cooling. If this precaution is not observed, there is a risk of overheating, as units with the reverse airow will be drawing in air which has already been heated by the PLM+s.

3.3.2. Temperature Sensing and Protection

The PLM+ is equipped with a sophisticated temperature sensing system which protects it from any overheating which may occur as a result of inadequate ventilation.

Note: Always ensure the dust lters behind the detachable front panel are clean to ensure maximum possible airow.

3.4. Operating Voltage

The label adjacent to the mains (AC) input connector indicates the AC mains voltage for which the device is wired and approved. Both PLM+ models incorporate a universal power supply operating from 80 to 265 V. Only connect the mains cable (AC cord) to an AC source of the voltage shown on the label.

The PLM+ uses primary switching, which means the mains power is rectied on the primary side of the transformer. This makes the power supply insensitive to mains frequency variation, and it will operate normally on line frequencies from 45 to 75 Hz.

PLM+ SERIES Operation Manual rev 1.0.0

3. Installation

powerCON pin

L Brown

N Blue

Green/Yellow

If the mains plug (AC plug) tted to the mains cable (AC cord) is not appropriate for your country, it can be removed and a locally-sourced one tted instead, observing the color coding in the table below:

Table 3.1: AC Plug Conguration

If you are not 100% condent of your competence to replace the mains plug (AC plug), the task should be carried out by qualied personnel.

Once a suitable AC power supply is connected, the device can be turned on using the front panel power button. When the device is turned on, the power button LED changes from red (Standby) to green (Active).

Note: In-rush current is controlled and limited during the soft-start sequence. This enables multiple PLM+ units on the same AC mains circuit to be turned on simultaneously

3.5. Grounding

Analog inputs feature Iso-Float™ ground isolation, a technology which combines the benets of transformer coupled isolation with the advantages of clean, direct-coupled inputs.

The audio converters are galvanically isolated, and not connected to mains ground. High-speed transformers and opto-isolators create a barrier between the device and the outside electrical environment.

Note: The Iso-Float feature is activated by default, but may be disabled via the Lake Controller software, or via the front panel menu.

Use correctly-shielded balanced audio input connections to minimise hum and interference. Please refer to section

8.2.4 for further information.

NEVER disconnect the earth (ground) pin on the mains cable (AC power cord).

PLM+ SERIES Operation Manual rev 1.0.0

4. Product Overview

4.1. Front Panel Overview

The front panel presents the following amplier status indicators:

1 2 4

7 8 9 12

10 2 1

The front panel controls are clustered around a daylight readable LCD 3 , allowing adjustment and monitoring of the majority parameters and meters. The two clusters of controls on either side of the LCD include ve dedicated function buttons

4 5 6 7

, eight dynamic function buttons with embedded LEDs

8 9

and a rotary data

encoder 11 .

Handles – Two sturdy cast aluminium handles are integrated into the front panel. The handles should be used

when carrying the device, and when tting into or removing from a rack. Ensure that any door or removable rack front cover has sufcient depth to clear the handles.

Dust Filters – Two dust lters are tted behind metal covers. To remove the covers, loosen the thumbscrews

located behind the handles. Once detached, the dust lter elements can be removed for cleaning; please refer to section 9.2 for further information.

Note: NEVER operate this device without the dust lters in place.

Display – The display illuminates when the device is on. The LCD, function buttons, and the rotary encoder

provide real-time control and monitoring of most parameters. The LEDs embedded in the function buttons indicate available menu options, provide conrmation of Controller communication, and indicate various faults and warnings.

The brightness and contrast of the display and front panel LEDs can be adjusted via the front panel menu. A screensaver will turn off the display when the unit is left without any action or signal present. It will light up again at the push of any button or when signal reaches above 20 dB on any input. Please refer to section 7 for further details.

Standby – PLM+ Series devices are powered on and to standby using the top-left button, or via the

Lake Controller.

PLM+ SERIES Operation Manual rev 1.0.0

4. Product Overview

Mute Enable – Select MUTE ENABLE to allow the dynamic function buttons to operate as mute controls for

the Module inputs and power output channels. The MUTE ENABLE button ashes when the mode is selected; a subsequent press deselects this mode. If left activated, MUTE ENABLE mode will automatically disable two minutes after the last mute action.

Meter – The METER button scrolls through various meter views including the default Home View, Amplier

Meters View, Temperature Meters View, Input Meters View and Module Meters View. Pressing METER from Menu Mode returns the screen to Meter Mode with the Home View displayed. Please refer to section 7.5 for further details.

Menu – After pressing the MENU button, the LCD will display the top level menu. In Menu Mode the dynamic

function buttons enable access to various information and functionality. Please refer to section 7.6 for further details.

Dynamic Function Buttons with LEDs (Left of LCD) – The function of these buttons change according to

the currently selected view or menu.

• In Menu Mode they are used for menu navigation and for parameter selection

• In Meter Mode they provide Module input mute/unmute functionality in conjunction MUTE ENABLE

The left buttons provide Module input mute functionality, mute indication and faults and warning indications relating to the individual PLM+ inputs. All four LEDs will iluminate simultaneously when indicating global faults or warnings. Please refer to section 7 for further details.

Dynamic Function Buttons with LEDs (Right of LCD) – The function of these buttons change according to

the currently selected view or menu.

• In Menu Mode they are used for menu navigation and for parameter selection

• In Meter Mode they provide PLM+ output mute/unmute functionality in conjunction MUTE ENABLE

All LEDs provide individual mute, clip, fault and warning indications for the PLM+ power outputs channels. Please refer to section 7 for further details.

Communication LED – The high-intensity white LED illuminates white to indicate that the Module/Frame is

selected in the Lake Controller; it ashes white to indicate communication with the Lake Controller.

The brightness of the LCD and communications LED can be adjusted in the Frame page of the Main Menu on the front panel.

Rotary Encoder – The rotary encoder is used to modify various parameters (e.g. input level) via the menu.

When a menu item is selected that permits adjustment of parameter values, the ring around the rotary encoder illuminates. In Home View the encoder can be used to scroll through the Meter Views.

Exit – The EXIT button is used primarily while navigating the menu system in Menu Mode; pressing EXIT will

return the menu up one level. In Meter Mode, pressing EXIT returns the metering display to the default Home View.

PLM+ SERIES Operation Manual rev 1.0.0

4. Product Overview

SPEAKER OUTPUTS

INPUT 1 INPUT 2 INPUT 3

AES/EBU

INPUT 1-2 INPUT 3-4

SECPRIM

Must be grounded/earthed

Made in Sweden

PIN 1: SCRN 2: POS 3: NEG

ANALOG WITH ISO-FLOAT

50-60Hz

100-240V 2400-2950W

INPUT 4

SWITCHED 00/ 000 Base-TX1 1

1Gbps 1Gbps

LINK

ACT

LINK

ACT

PLM 2K44

4.2. Rear panel

CH 1

CH 2

Ser. N:o

1+/- CH 1+/-

CLASS 3

2+/- CH 2+/-

WIRING

BRIDGE CH 1 & 2:

The PLM+ is available with a choice of connectors for power outputs: binding posts or Neutrik speakON®. Both connection methods allow for Bridge Mode operation, which is activated from the Lake Controller software. Please refer to the Lake Controller Operation Manual and section 8.1.1 of this Operation Manual for further information on Bridge Mode.

Removed!

1+:+ 2- : -

SPEAKER OUTPUTS

BRIDGE

1+/- CH 1+/-

3+/- CH 3+/-

2+/- CH 2+/-

4+/- CH 4+/-

CLASS 3 WIRING

1+/- CH 3+/2+/- CH 4+/-

BRIDGE CH 3 & 4: 1+ : +, 2- : -

INPUT 1 INPUT 2 INPUT 3

CH 3

CH 4

3 4 51

ANALOG WITH ISO-FLOAT

INPUT 4

PIN 1: SCRN 2: POS 3: NEG

INPUT 1-2 INPUT 3-4

AES/EBU

1Gbps 1Gbps

ACT

LINK

SWITCHED 00/ 000 Base-TX1 1

ACT

SECPRIM

LINK

PLM 2K44

Made in Sweden

100-240V 2400-2950W

50-60Hz

Must be grounded/earthed

Binding Posts – In this version, the power outputs for loudspeaker connection are available on four separate

pairs of fully enclosed binding posts. Bridge Mode can be enabled via the Lake Controller software; please refer to the Lake Controller Operation Manual for further information.

speakON Connectors – The power outputs are simultaneously available on a single 8-pole speakON

connector, and on two 4-pole speakON connectors. The two 4-pole connectors carry the outputs of channels 1 & 2 and 3 & 4 respectively. Bridge Mode can be enabled via the Lake Controller software. Please refer to the Lake Controller Operation Manual.

Analog Inputs – Analog inputs are available on four standard XLR3F latching connectors. The inputs are

electronically balanced and feature Lake Iso-Float circuitry. The impedance is 20 kohms, and the inputs can accept a maximum input level of +26 dBu.

AES3 Inputs – Two latching XLR3F connectors are provided for AES3 digital audio signals (four audio

channels). Input impedance is 110 ohms, please ensure that 110 ohm digital audio cables are used; standard XLR microphone cables are rarely suitable for reliable digital audio transmission.

Note: The PLM+ does not provide Analog or AES loop through / Link connectors. Where needed, it is recomended to use Y-split cables or patchpanels wired to connect the Inputs with Link output connectors. The AES3 termination load shall be enabled when the PLM+ is the last unit connected within an AES3 daisy-chained system. The termination may be disabled, if desired, via the front panel menu and within the Lake Controller software.

PLM+ SERIES Operation Manual rev 1.0.0

4. Product Overview

Primary Network Connector – The primary Neutrik RJ45 etherCON® connection provides integration into

an Ethernet control network which may include other Lake Processors and the Lake Controller software. Network connection permits full control of all functions along with real-time metering from a remote position. This device supports the Dante audio networking protocol, which allows transmission of multichannel, high-denition digital audio over the same Ethernet connection.

Use the primary connector when using a star network topology, consisting of individual Cat-5e connections between the devices and an Ethernet switch. Alternatively this connection can be used to daisy chain directly to another Lake Processor. The daisy chain topology should not be used with Dante. For a technical reference to the Ethernet Port, please refer to section 8.4. Additional information is also available in the Lake Network Conguration Guide.

Note: The Ethernet ports operate at the Ethernet data rate of up to 1 Gbps and allow straight or crossed network cables. LEDs above each port indicate network activity (ACT) and Gigabit network connections (Gbps). If Gbps LED is unlit, speed is 100 Mbps.

Secondary Connector – The secondary network connector can be used to daisy-chain multiple LM,

PLM, PLM+ or D Series devices. Alternatively, a Dante dual-network topology can be created by connecting all secondary network connectors to a separate Ethernet switch, ensuring full redundancy in the event of a network component failure.

Note: Additional processor conguration is required for a dual redundant network setup. The device may be congured for Dual Redundancy from the Network menu of the front panel or via Lake Controller. See the Lake Controller Operation Manual for further details.

When the device operates in Dual Redundancy, a symbol (=) is displayed in the status bar. Dual Redundancy is not enabled by default and must be congured.

For a technical reference of the Ethernet Port, please refer to section 8.4. Additional information is also available in the Lake Network Conguration Guide.

Note: When connecting multiple devices to an Ethernet network, care must be taken NOT to create a closed loop which causes network malfunction.

PLM+ SERIES Operation Manual rev 1.0.0

5. Operation and performance

Load Impedance (ohms)

2 ohms

(per channel)

2.67 ohms

(per channel)

4 ohms

(per channel)

8 ohms

(per channel)

16 ohms

(per channel)

PLM 12K44 300 0 W 300 0 W 300 0 W 1900 W 950 W

PLM 20K44 4400 W 5000 W 4400 W 2300 W 1150 W

5. Operation and performance

This chapter provides comprehensive information on PLM+ Series connection, setup, operation and performance. The detailed information included here is essential to realizing the full functionality of the PLM+ Series devices.

5.1. Operation precautions

Make sure that the Standby button on the PLM+’s front panel is either unlit (OFF), or red (STANDBY), before making any input or output connections.

Ensure the AC voltage is within the range printed on the label adjacent to the AC mains connector.

Ensure no input signal is present when powering on the PLM+ to reduce the risk of any inadvertent bursts of high level audio.

5.2. Power Output Performance

The PLM+ uses Lab.gruppen’s patented Class TD technology (Tracking Class D) in the output stages, which couples the efciency of Class D topologies to the sonic purity of Class A/B designs.

The primary benet is that Lab.gruppen’s Class TD works perfectly under all load conditions. The output maintains its at frequency response even into complex loads with very low nominal impedances. Reliability is very high, and there is no interference with nearby RF equipment. Superior efciency allows greater power density while minimizing cooling requirements, yet sound quality matches that of the best Class A/B designs.

5.2.1. Symmetrical Power

The PLM+ models can deliver power as shown in Table 5.1 when all channels are driven equally.

Table 5.1: Symmetrical Load Power Ratings

PLM+ SERIES Operation Manual rev 1.0.0

5. Operation and performance

5.2.2. Rational Power Management™

Rational Power Management™ (RPM) is a unique Lab.gruppen feature that allows for exible allocation of power across channels of a PLM+. Power that is not used by one output channel is free for use by another output channel with greater demands. RPM allocates power up to the total limits of the specic amplier model. RPM exists in two modes. See the image below.

3000 W

LOW

PLM+ Series - Amp channels power adjusted to match the loudspeaker requirements

MIDSUB

HIGH

Figure 5.2: PLM 12K44 - Amp channels power adjusted to match the loudspeaker requirements

Auto RPM: The frame will automatically allocate power per output channel according to the ISVPL settings in the

speaker preset (per module output) in Lake Controller. If the ISVPL settings taken together allow total output higher than the capabilities of the amplier, RPM will reduce the ISVPL limiter thresholds evenly based on a proportional reduction in dB. When RPM is active, an RPM icon will be displayed next to the “Actual ISVPL” values in the Events & Control section. If actual ISVPL is above the normal platform maximum and equals speaker threshold, the RPM indicator will be green. If actual ISVPL is above normal platform maximum but below speaker threshold, the RPM indicator will be yellow.

Custom RPM: The CAFÉ software allows users to create an advanced custom power allocation scheme. Switching to Custom mode disables the Automatic mode. When RPM is active an RPM icon will be displayed next to the “Actual ISVPL” values in the Events & Control section. Please nd more information about this in documentation supplied with the CAFÉ software download.

RPM limitations: PLM 20K44 allows all four channels to deliver Channel Max output voltage of 194V. PLM 12K44 allows two channels to deliver Channel Max output voltage of 194V.

PLM+ SERIES Operation Manual rev 1.0.0

5. Operation and performance

CAFÉ with ESP: CAFÉ (Conguring Ampliers For the Environment) is a dedicated software application for Windows and OSX that provides tools for system planning, specication and commissioning. CAFÉ incorporates the Equipment Specication Predictor, a software module that examines SPL and speaker requirements for a project and generates requirements for output power on an amplier and system level. For more information on CAFÉ and ESP, please consult the documentation supplied with the CAFÉ software download.

5.3. Ampliﬁer and Load Protection Systems

The PLM+ is equipped with a comprehensive set of protection circuits. If operating conditions become sufciently extreme that any of these circuits become active, indication is provided by LEDs in one or more soft function buttons 5-8, together with adjacent warning text. In addition to this, notication is also presented within the Lake Controller software and within system log les.

5.3.1. Inter-Sample Voltage Peak Limiter (ISVPL)

The ISVPL is a high quality voltage limiter that can deliver seamless limitation to any desired level. Its ensures that the voltage at the output terminals never exceeds the dened threshold.

It operates on these principles:

• The signal is delayed slightly to allow the ISVPL to look-ahead and reduce the gain before voltage in excess of the threshold can appear at the output. This results in zero voltage overshoot at the output with a rounded limitation up to the threshold.

• The amplitude of the output signal between digital samples is predicted which permits the ISVPL to respond to analog peaks that may occur at the digital to analog converter.

• The release time of gain reduction is adaptive depending on the dynamics of the signal. It is possible to select different ISVPL proles for limiting optimization for a specic frequency band and personal preference. The proles are divided into two categories, with one category optimized for low distortion and the other focusing on producing high sound pressure level (SPL). Within each category there are proles optimized for the different frequency bands.

5.3.1.1. Low Distortion Proﬁles

• Universal – The universal prole is a soft limiter that can be used for all frequencies and is conservative in its action upon VCL and CPL.

• Sub/LF – The Sub/LF prole is tuned for frequency bands below 600 Hz. It has longer attack and release times and is less conservative when it comes to acting upon VCL and CPL.

•

5.3.1.2. High SPL Proﬁles

High SPL proles do not use the adaptive release time feature. High SPL proles optimized for high frequencies use less of the look-ahead delay peak-rounding feature; this feature is used most in the Sub prole and least the HF prole.

• Sub - The Sub prole is optimized for frequencies between 20 - 200 Hz

• LF - The LF prole is optimized for frequencies between 20 - 1200 Hz

• MF - The MF prole is optimized for frequencies between 300 - 6000 Hz

• HF - The HF prole is optimized for frequencies above 1 kHz

PLM+ SERIES Operation Manual rev 1.0.0

5. Operation and performance

Max. Sinewave Burst Power (Watts)

LLoad Impedance (ohms)

2 2.67 4 8 16

LISVPL SETTING (V peak)

194 4489 5993 4705 2352 1176

193 4489 5993 4656 2328 1164

181 4489 5993 4095 2048 1024

167 4489 5223 3486 174 3 872

153 4489 4384 2926 1463 732

121 3660 274 2 183 0 915 458

101 2550 1910 1275 638 319

83 1722 1290 861 431 215

70 1225 918 613 306 15 3

56 784 587 392 19 6 98

47 552 414 276 138 69

38 361 270 181 90 45

17.8 79 59 40 20 10

Table 5.3 shows the theoretical maximum output power for a given load impedance and ISVPL setting.

Note: An ISVPL-to-load calculator that will assist in generating the appropriate ISVPL setting for a desired power load is available at www.labgruppen.com/plm. The ratings shown in the table below are limited by the CPL (Current Peak Limiter) functions, not by ISVPL settings, due to power output channel current capacity.

Table 5.3: ISVPL-to-output examples

The ISVPL threshold may be set at any level between 17.8 V and 600 V via the PLM+’s menu system. For further details, please refer to section 7.11.2.5 of this manual, and also to the PLM+ Series chapter in the Lake Controller User Manual.

PLM+ devices that have a smaller peak output voltage can still set the ISVPL threshold up to 600 V. When a threshold is set above the maximum capability of a power output channel, the maximum ISVPL for that product will be automatically set. Therefore, the ISVPL threshold can be in at the Module for the speaker’s maximum capability, and the Module le remains cross-compatible with all PLM and PLM+ Series devices.

5.3.2. Current Peak Limiter (CPL)

The output Current Peak Limiter (CPL) ensures that the power output section will not be damaged by forcing it to deliver current levels at the outputs that exceed the maximum current ratings of the output transistors. The CPL keeps the output transistors within their Safe Operating Area (SOA). The CPL is non-adjustable.

CPL activity is indicated on the power output channel LED (embedded in the associated output channel’s function button to the right of the LCD). Activity on an affected channel results in a ashing red indication together with a CURRENT CLIP warning message displayed on the screen adjacent to the LED. A warning is also displayed on the controlling PC via the network.

PLM+ SERIES Operation Manual rev 1.0.0

5. Operation and performance

This condition indicates an attempt to draw excessive current at the output. The output is attenuated until the output current falls below the maximum current rating. Limiting is performed by the ISVPL limiter in conjunction with the selected ISVPL prole. Please refer to the Technical Specications in Section 11 for further details regarding ratings.

Note: If excessive current is indicated, check the output cables and examine the loudspeaker. If impedance appears normal, you may rectify the condition by altering the ISVPL settings or lowering input levels. CPL indication can be triggered by excessively low output impedance, possibly the result of too many loudspeaker cabinets connected in parallel.

5.3.3. Power Average Limiter (PAL)

PAL activity is indicated by all four LED’s to the left adjacent to the display ashing red, together with a PAL ACTIVE warning message displayed on the screen. A warning is also displayed on the Lake Controller software.

The Power Average Limiter Active warning (PAL Active) will be displayed when the power supply’s maximum rated design parameters are reached. When this warning is displayed, gain limiting is being applied to the signal and the ISVPL threshold is lowered accordingly.

5.3.4. Breaker Emulation Limiter (BEL™)

The PLM+ ampliers are powerful devices that can draw a considerable amount of current from the mains supply. The BEL models the temperature in the external breaker and limits the mains current to prevent it from tripping. The BEL can be congured with both a breaker prole and a current value. The current value can be set from 5 to 32 Arms.

There are three different proles available for selection:

• Conservative - The conservative prole allows no momentary current above the congured threshold.

• Fast - The fast prole models the time constant of the trip-curve corresponding to a fast breaker. It momentarily allows current above the threshold to pass for a short time, leading to an increased modeled temperature. For the limiter to disengage, the current must reduce below the threshold to enable the breaker to cool down.

• Universal - The universal prole models the time constant of the trip-curve corresponding to a slow breaker. It momentarily allows current above the threshold for a longer time, leading to an increased modeled temperature. For the limiter to disengage the current has to reduce below the congured current for the breaker to cool down.

The BEL can be congured via the PLM+ front panel and within the Lake Controller software.

PLM+ SERIES Operation Manual rev 1.0.0

5. Operation and performance

5.3.5. Under Voltage Limiter (UVL™)

PLM+ devices are equipped with an under voltage limiter. With mulitple powerful devices on a mains distribution line, heavy current loads risk the reduction of voltage below that required for devices to function. The UVL reduces the mains current draw when voltage drop below 80 V. The amount of reduction applied increases as mains voltage drops towards 65 V, then at 65 V the power supply is shut down. The mains supply is continually monitored and when sufcient voltage returns the power supply automatically restarts.

5.3.6. Current Average Limiter (CAL™)

The Current Average Limiter (CAL) monitors the RMS current drawn from each power output channel to ensure that the power output stages are not overloaded. When activated, it regulates the current to a safe level to protect the channel. The CAL should not be activated in normal usage, but if it is, its operation is indicated by an active LED and the message CAL ACTIVE. Further indication is given within the Lake Controller software.

5.3.7. Voltage Clip Limiter (VCL)

If current draw from the PLM+’s power supply is too high, the PSU’s regulation capability may be exceeded and the internal voltage rails may drop and cause clipping. If this occurs the VCL acts rapidly to prevent clipping on the subsequent peaks. Limiting is performed by the ISVPL limiter in conjunction with the selected ISVPL prole. Indication of this condition is shown on the output LEDs.

5.3.8. Temperature Protection

5.3.8.1. Overview

PLM+ Series devices are equipped with a sophisticated temperature sensing system that provides protection from overheating which may occur as a result of inadequate ventilation or excessive power output.

Thermal measurements are made at several points within each power output channel along with measurements in the power supply and DSP areas. If temperature in any area reaches a critical level then a warning is displayed and gain reduction is applied. If the temperature continues to increase and reaches a dangerous level then a fault is displayed and audio is muted. Each power output channel, the power supply and DSP area have separate indications.

For all temperature faults, temperature monitoring will continue at 0.5 second intervals, with the output remaining muted. When the area has cooled below the dangerous threshold, the fault condition is cleared and audio is restored.

PLM+ SERIES Operation Manual rev 1.0.0

5. Operation and performance

5.3.8.2. Power Output Channels

A power output channel temperature warning or fault is indicated in one of the front panels LEDs (in the right-hand soft function buttons).

• A warning is indicated by a static yellow LED and adjacent warning message: TEMP WARN:CH

• A fault is indicated with a static red LED and adjacent warning message: TEMP FLT:CH

An event report is sent to the Lake Controller software for both the warning and the fault. If a temperature fault condition arises on a power channel, the output of that channel will be muted.

5.3.8.3. Power Supply / DSP

A power supply (PSU) or DSP temperature warning or fault is indicated by the LEDs in the four left function buttons being lit at the same time.

• A warning is indicated by static yellow LEDs and adjacent warning message: TEMP WARN:PSU (or TEMP WARN:DSP)

• A fault is indicated with static red LEDs and adjacent warning message: TEMP FLT:PSU (or TEMP FLT:DSP)

At temperatures above the critical warning level and below the dangerous fault level, the ISVPL threshold is slowly reduced to decrease the output power and cool down the device. This enables the device to continue to pass audio, although with a reduced amplitude, in extreme conditions. If reducing the ISVPL threshold does not cool down the device a temp fault will still be issued when the dangerous temperature level is reached. An event report will be sent to the Lake Controller software for both the warning and the fault.

5.3.9. DC Protection

DC protection is implemented on each power output to prevent damage to connected loudspeakers or any PLM+ components. DC present at the output will cause the PLM+’s power output module breaker to blow. In this instance a red LED will illuminate and NEEDS SERVICE will display on the LCD.

Note: The power output channel modules are independent of the input voltage. This is not a userservicable fault condition and the unit should be returned for repair.

5.3.10. VHF Protection

The PLM+ includes protection circuits that detect Very High Frequency (VHF) content in the input signal. The detection is frequency-dependent, initiated from 10 kHz upwards. If continuous VHF signals are detected above the threshold, the output will mute for approximately 6 seconds before a further measurement is taken. When continuous VHF signal stops, the output unmutes and the amplier returns to normal operation.

PLM+ SERIES Operation Manual rev 1.0.0

5. Operation and performance

This protection system recognizes only continuous VHF signals at high levels that will not appear in speech or music. Any such content can therefore be considered as a fault condition. VHF protection is essential to avoid damage to HF drivers.

VHF protection is dependent on a combination of output power level and frequency. Figure 5.4 shows a decreasing power threshold, from approximately 10 kHz upwards, which illustrates increasing sensitivity of the protection system with frequency. When continuous output power above the threshold line is detected, VHF protection becomes active.

Trigger voltage

100

Voltage [Vrms]

0 5

10 15 20 25 30

Frequency [kHz]

Fig 5.4: VHF Protection Frequency Sensitivity

The attack time of the VHF protection circuitry also changes with frequency, becoming shorter at higher frequencies. This is shown in Figure 5.5.

Full output voltage

1400

1200

1000

800

600

Time [ms]

400

200

0 5

10 15 20 25 30

Frequency [kHz]

Fig 5.5: VHF Protection Attack Time Variations

The VHF protection circuit is NOT a limiter and does not alter the PLM+’s frequency response. It is implemented solely to detect continuous VHF content. HF content of normal music or speech signals at peak levels will be passed in full.

Operation of the VHF protection circuits is indicated by one (or more) of the output channel LEDs (in the right-hand soft function buttons) showing steady red. The adjacent fault message will show VHF FAULT. It is also reported as a fault via the control network.

PLM+ SERIES Operation Manual rev 1.0.0

5. Operation and performance

5.3.11. Short Circuit Protection

A low impedance or short circuit at the power output terminals is detected when the output current is high (Current Peak Limiter is active) and, simultaneously, the peak output voltage is below a predetermined threshold. When this situation occurs, the output stage is muted to protect it from damage. Operation of the short circuit protection system is indicated by an output channel LED (in the right-hand soft function buttons) showing steady red. The adjacent fault message will show SHORT CIRCUIT. It is also reported as a fault via the control network to the Lake Controller software. The presence of a short circuit (or low impedance) is re-tested every six seconds, and the output remains muted until the fault clears.

5.4. Power Supply

The R.SMPS (Regulated Switch Mode Power Supply) is designed to keep supply voltage rails at optimum levels even when the mains voltage drops. Mains voltages can drop as much as 20% below nominal before there is any effect on rail voltages. Thus the R.SMPS can deliver full rail voltage to the output stage at all times, allowing the PLM+ to exhibit consistent transient response and a clean LF response. PLM+ features a universal power supply with power factor correction (PFC). The device can accept any mains voltage, from 65 V to 265 V, allowing it to function worldwide in many different congurations. The PFC reduces current peaks on the lines and reduces the requirements placed on the mains distribution system. PLM+ units offer an unparalleled power factor extremely close to one.

5.4.1. Low Inrush Current

High power ampliers with inadequate inrush current limiting can draw considerable current from the mains at turnon, sometimes tripping a fast-acting mains breaker. The PLM+, however, has very low inrush current to prevent tripping of breakers.

Several PLM+s can, under normal conditions, be powered up simultaneously. If you do experience problems powering up multiple PLM+s simultaneously, they must either be turned on manually in an ordered manner, or sequenced remotely using the Lake Controller software’s Global Control feature. Alternatively, the capacity of the mains supply should be increased.

Note: If insufcient power is available to allow simultaneous power-up, then there is probably insufcient capacity for full power output during operation. It is recommended that additional capacity is added to the mains power distribution system.

PLM+ SERIES Operation Manual rev 1.0.0

6. Signal Flow and Lake® Processing

6.1. Signal Flow

The gures below depict the audio signal ow for a PLM+ Series device. It is worth noting that this sophisticated device provides seven points in the signal chain where the signal level can be adjusted, muted or disconnected. The blue sections represent Frame data, and the red sections represent Module data - please refer to the Lake Controller Operation Manual for further information.

Important information regarding correct setting of the gain structure can be found in section 10.3.

Module Data stored in Module FIles (Speaker Presets)

Frame Data stored in System Files and Frame Presets

Attenuator

INPUTS

Dante Receivers 1-8

AES 1-4

Analog 1-4

AES/Analog

pass through

to Dante

OUTPUTS

Dante 1-8

(no mutes)

Input

Routers

1-4

WITH

INPUT

MUTES

Input

Mixer A

Input

Mixer B

Input

Mixer C

Input

Mixer D

Lake Contour

Module A

Lake Contour

Module B

Lake Contour

Module C*

Lake Contour

Module D*

Phase Rev

Custom RPM

Attenuator

Phase Rev

Custom RPM

Attenuator

Output Routing

Phase Rev

Custom RPM

Attenuator

Phase Rev

Custom RPM

Mute

ISVPL

Auto RPM

ISVPL

Auto RPM

ISVPL

Auto RPM

ISVPL

Auto RPM

Amp Gain LoadSmart LoadPilot AMP

1 2 43 5

Figure 6.1: PLM+ Signal Flow Diagram

6.2. Level Adjustments & Mute Points

Input Router Stage Input selection and MUTE

Input Mixer Stage Router on /off connection to mixer and gain settings

Module Input Stage Mute (N/A for LM Series Mesa Mode) and gain settings

Module Output Stage Mute and gain settings

Output Router Stage Output on /off routing connections

Attenuation Stage Power output channel mute and attenuation settings

Amp Gain Stage Amplier gain control

Note: If the required audio signal is not passing correctly, verify the connection, mute and gain settings at all seven stages.

PLM+ SERIES Operation Manual rev 1.0.0

6. Signal Flow and Lake® Processing

Input Sensitivity

LISVPL SETTING

194 V 17.8 V

LGAIN (dB)

+44 +1.0 0.87 -19.8 0.08

+41 +4.0 1.22 -16. 8 0.11

+38 +7.0 1.73 -13 .8 0.16

+35 +10. 0 2.44 -10.8 0.22

+32 +13. 0 3.45 -7. 8 0.32

+29 +16 .0 4.87 -4.8 0.45

+26 +19 .0 6.88 -1. 8 0.63

+22 +23.0 10 .90 +2 .2 1.00

6.2.1. Power Output Section: Limiting and Sensitivity

The Current Peak Limiter (CPL) dynamically limits the drive to the power stage based on three parameters: sensed output current level, feedback from the output stage, and sensed voltage clip from the ISVPL. This ensures that power output is maintained within the design limits of the PLM+.

The adjustable Inter-Sample Voltage Peak Limiter (ISVPL) sets the PLM+’s maximum output voltage and therefore also the maximum output power. The ISVPL setting is made via MENU > MODULE > LIMITERS > ISVPL, and can also be set from the Lake Controller software.

The sophisticated output section monitors faults and generates warnings when appropriate; warnings are displayed on the front panel of the PLM+ and also sent as messages over the control network. In the rare event that maximum ratings are signicantly exceeded, the PLM+ will mute until the condition has been rectied or the incorrect setting has been readjusted. Sensing circuits also transmit local output power stage temperature, processor card temperature, and PSU temperature to the appropriate protection circuits. Please refer to section

5.3 further details.

Table 6.2 lists PLM+ Series analog input sensitivity in dBu and Vrms for various Amp Gain settings and maximum/ minimum ISVPL settings, assuming an analog input headroom of 26 dBu.

Table 6.2: Analog Input Sensitivity in dBu and Vrms

6.3. Lake Processing and Control

As outlined in section 2.2.3, this device integrates seamlessly into the Lake Processing environment, providing all features, functionality and connectivity associated with all Lake Processors. The internal Lake Processing includes programmable crossovers, EQ, dynamics and other functions, and can be fully controlled via the Lake Controller software with a version number of 6.3 or later. Additionally, many functions can be controlled or accessed directly via the front panel.

The Lake Controller Operation Manual and Lake Network Conguration Guide are supplied on the accompanying USB key and additional documentation is available from the Start Menu after software installation.

Visit http://labgruppen.com to download the latest software, rmware and documentation for your devices.

PLM+ SERIES Operation Manual rev 1.0.0

6. Signal Flow and Lake® Processing

6.4. Modules and Frames

6.4.1. Overview

A Frame represents one physical Lake Processor device (e.g. PLM 12K44). A maximum of four Modules are contained within each Frame; these are referred to as Module A, B, C and D. The number of Modules shown in a given Frame is dependent upon the signal processing conguration of that Frame.

Each Module can be congured as a Classic Crossover (Bessel, Butterworth, Linkwitz-Riley), as a Linear Phase Crossover, or as multiple full bandwidth Auxiliary Outputs. The default conguration for the PLM+ is 4 x Contour Classic 1 Way (CL1-Way) Output Modules, providing a total of twelve Module outputs that can be routed to any of the four power outputs.

Please refer to the Lake Controller Operation Manual for further information.

6.4.2. LoadLibrary™ and Fingerprints

Notes

In addition to the standard loudspeaker presets (Module les), the Lake Controller also includes a set of enhanced Module les specically for use with the PLM and PLM+ Series.

These supplementary PLM+ Module les, known as the LoadLibrary, incorporate both Lake DSP parameters along with PLM+ specic data; LoadLibrary Module les include parameter settings for the Amplier Gain and ISVPL limiter. Additionally, LoadLibrary loudspeaker types may also include data relating to the electrical characteristics of a particular loudspeaker.

Electrical characteristic data is used to enable load verication (LoadSmart) to be performed on the PLM+. This data set is termed a Fingerprint. When a PLM+-specic loudspeaker type is loaded, its Fingerprint load characteristics are included. These load characteristics are stored in a le with a “.mdl” sufx and are loaded simultaneously with the module le.

6.5. Loudspeaker Processor Overview

The Lake Processing system within PLM+ Series devices may be congured with up to four processing Modules containing a total of up to twelve processing Module outputs, that can be routed to any of the four power output channels.

Each set of processing elements is referred to as a Module and can be congured as crossovers, full bandwidth auxiliary outputs, or a combination of the two. The relationship between inputs and outputs is dened via the Lake Controller or via the front panel Input Cong Menu.

The Lake Processing system provides two distinct categories of crossovers:

• Innite Impulse Response lters (IIR) such as the classic Bessel, Butterworth or Linkwitz-Riley types; these are available with slopes ranging from 6 dB/octave to 48 dB/octave.

• Finite Impulse Response lters (FIR) providing zero phase shift with steep transition slopes at the crossover frequencies. These are also referred to as Linear Phase Crossovers.

PLM+ SERIES Operation Manual rev 1.0.0

6. Signal Flow and Lake® Processing

6.6. Files and Presets

The Lake system provides various methods for storing and recalling Module, Frame, or system-wide data. An overview is provided below; for further information please refer to the Lake Controller Operation Manual.

6.6.1. Module, System and Sub-System Conﬁguration Files

Module, System and Sub-System Conguration les are stored on the Lake Controller PC, and data is passed across the network when recalling or storing these type of les.

• A Module le is the smallest set of data that can be stored and recalled; it contains crossover, gain, delay, and limiter information for an individual loudspeaker (see Figure 6.1). A Module le may be recalled into other Lake devices. It is not possible to store a Module File directly on the hardware device.

• A System or Sub-System Conguration File contains a set of Module le information in addition to Frame related information such Group data and I/O conguration (see Figure 6.1).

6.6.2. Frame and System Presets

The entire processor conguration can be stored as a Frame Preset on this hardware device. Presets can be recalled via the front panel (refer to section 7.11.7) or via the Lake Controller software or Preset Manager utility; presets can be stored using the Lake Controller software or Preset Manager utility.

A maximum of 100 Frame Presets can be stored on this device. The data within a Frame Preset includes the congurations of all Modules in the Frame, including levels, crossover, EQ, input mixer, routing, and all other parameters. As Frame Presets are stored in the hardware device, recall is available without using a PC.

Using the System Presets function in the Lake Controller, entire system congurations can be stored and recalled across a network of LM, PLM and PLM+ Series devices. This enables fast retrieval and switching of entire system congurations as minimal data is being sent between the Controller and Processors.

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7. Front Panel Interface

An overview of the front panel interface is provided in section 4.1. This chapter describes each cluster of controls as shown in the diagram below.

1 2 4

7 8 9 12

10 2 1

7.1. Overview

The front panel interface is framed by two sturdy cast aluminium handles 1 and metal grill protecting the air intake and dust lters 2 . The majority of PLM+ functions can be controlled and/or monitored via the frontpanel LCD

display screen 3 , power button 4 , function buttons

5 6 7

7.1.1. Operating Modes

The front panel has two basic modes: Meter Mode and Menu Mode.

8 9

and rotary encoder 11 .

• Meter Mode provides the following views: Home view, Amplier Meters view / LoadPilot view, Temperature Meters view, Input Meters view and Module Meters view. To navigate through these views, press the METER button or turn the rotary encoder button. Please refer to section 7.10 for further information on Meter Mode.

• Menu Mode provides various menus for viewing and editing parameters and is selected by pressing the MENU button. Select the required submenu by pressing the associated button.

7.1.2. Warning, Fault and Mute Indications

Fault or warning conditions are indicated via the LEDs embedded in the dynamic function buttons; a simultaneous description is shown adjacent to the button, on the LCD. The LEDs to the left of the LCD indicate problems with the PLM+ or its inputs, while those to the right indicate problems with the power output channels.

Please note that the same LEDs also indicate the mute status of inputs (left) and outputs (right). Further information on faults and warnings is provided in section 7.8.5 and section 9.1.

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7. Front Panel Interface

7.1.3. Selecting a Module in the Lake Controller software via the Front Panel

It is sometimes useful to identify which Module icon/s in the Lake Controller software are associated with a particular hardware Frame. To highlight the module in the Lake Controller software:

1. Ensure Meter Mode is selected and in Module view.

2. Press the button adjacent to the Module description on the left LCD. The corresponding module will show highlighted text on the Lake Controller screen.

If the Frame is online, but the Module is not in the work area, the selected Module will be centered on the Module scroll bar (assuming the Modules Menu is selected in the Lake Controller).

7.2. Front Panel Key Lock

It is possible to lock the front panel buttons for security purposes. When this function is active, all front panel controls (except power state) are disabled and all adjustment must be made via the network. To lock controls, press and hold button A then simultaneously press button B as shown in Figure 7.2; repeat this process to unlock.

2. Press

Figure 7.2: Locking / Unlocking Front Panel Controls

Note: A key icon will appear at the top of the display when the Front Panel is locked.

7.3. Power Button

The unit is powered on by pressing the top-left button on the front panel, labelled 4 in Figure 7.1. It has a bi-color power symbol which illuminates red when connected to the AC mains and the unit is in standby mode. It turns green when the button is pressed to turn the unit on. A subsequent press of this button returns the unit to standby mode.

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7. Front Panel Interface

7.4. Mute Enable Button

The dynamic function buttons to the immediate left and right of the LCD are used as MUTE buttons only when the MUTE ENABLE button 5 is activated (ashing).

When MUTE ENABLE is activated the MUTE ENABLE button will ash and the four buttons on the left act as Module or Input Router mute controls (depending on active view) and the four buttons on the right enable muting/unmuting of the Amplier Channel (power outputs).

In Meter Mode > Home View with MUTE ENABLE activated, text on the LCD adjacent to each button indicates when a Module input or Amplier Channel power output has been muted. Meter Mode must be selected for MUTE ENABLE to be activated; MUTE ENABLE is not available in Menu Mode.

To exit MUTE ENABLE mode, press the ashing MUTE ENABLE button. If no mute activity occurs for two minutes, MUTE ENABLE mode will automatically be disabled.

7.5. Meter Button

The front panel display has two main operating modes, Meter Mode (default) and Menu Mode. In normal operation, the display will be in Meter Mode.

The following views are available in Meter Mode: Home View (default), Amplier View / LoadPilot View, Temperature View, Input View and Module View. Pressing the METER 6 button scrolls through these views. Pressing the METER button when in Menu Mode will return the system to Meter Mode, with the Home View displayed.

7.6. Menu Button

Menu Mode is selected by pressing the MENU button 7 . The screen displays the top level menu with various submenu options. Press the button adjacent to the required submenu to select it.

Pressing the MENU button while in Menu Mode will display the previous menu level.

Menu Mode is used for processor conguration, or for editing a parameter. Please refer to section 7.11 for further details.

7.7. Exit Button

In Menu Mode, pressing the EXIT button 12 returns back one menu level. In Meter Mode, pressing EXIT returns the display to the Home View.

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7. Front Panel Interface

7.8. Dynamic Buttons, Controls and LEDs

B A

Figure 7.3: LCD with Dynamic Buttons, Controls and LEDs

7.8.1. Communication LED A

This bright white LED signies selection in the Lake Controller, or Controller communication providing visual conrmation of:

1. Network communication between the Lake Controller and the Lake Processor (Flashing LED).

2. Selection of the Lake Processor in the Lake Controller software (Steady LED).

Note: The Communication LED can be dimmed via the front panel by selecting Frame menu, and then Front > Dimming. Dimming affects all LEDs as well as the backlight of the display.

7.8.2. Frame Faults and Warnings LED

All four LEDs on the left ash/off red to indicate a Frame fault and ash yellow/mute state to indicate a Frame warning. Additional clarication of the current fault or warning is displayed in the bar of the LCD. All mute, fault and warning states displayed on the front panel are summarized in section 9.1.

Additional faults and warnings are reported in the Event Log of the Lake Controller only. All faults and warnings recorded in the Event Log are listed in section 9.1 along with scenarios that may have arisen to cause them.

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7. Front Panel Interface

7.8.3. Rotary Encoder

The rotary encoder is used to adjust parameters in conjunction with the selection made via the dynamic function buttons and LCD menus. The ring around the rotary encoder illuminates when a selected parameter is available for adjustment.

Turn the encoder clockwise to increase the selected parameter, or counter-clockwise to decrease the value. Parameters with only two states (e.g. ON, OFF) are toggled by turning clockwise or counter-clockwise. Some parameters enable simultaneous adjustment of a combination of input and output channels.

To select which channels are adjusted:

1. Press the associated soft button/s to select the parameter/s for editing. A selected parameter is indicated by inverse text and background color.

2. Use the rotary encoder to change the value.

It is possible to select multiple parameters for simultaneous editing even if the values are different on each channel. Turning the rotary encoder will adjust each parameter by the same increment. When in Meter Mode, the rotary encoder allows the user to change between the available meter views.

Note: Some menus permit parameters to be adjusted across multiple channels simultaneously by default.

7.8.4. Dynamic Function Buttons

The buttons surrounding the display are unlabeled because their functions change according to the currently selected menu or display.

In Meter Mode with MUTE ENABLE activated, these dynamic function buttons are used to mute or unmute the Module Inputs and power output channels.

In Menu Mode these buttons are used to navigate the menu structure. This is indicated by a thin line on the display closest to the button used. During menu navigation, the color of the embedded LEDs continues to indicate the mute status, clips, or faults and warnings relevant to the associated input or output channel on the PLM+.

Note: Each button contains a tricolor LED which conveys fault and warning indications in addition to the mute status. The LED color does not necessarily correspond to the currently selected function.

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7. Front Panel Interface

7.8.4.1. Mute Functions

The PLM+ provides mute functions at several different points in its audio chain. Please refer to section 6.1 for further information. The four types of mute are:

1. PLM+ Input Router Mute

2. Module Input Mute

3. Module Output Mute

4. Power Output Mute

With the exception of Module output mutes, all types may be controlled from the PLM+ front panel in Meter Mode by activating MUTE ENABLE and selecting the associated input or output Meter View using the METER button. Module Ouput Mute is available in Menu mode Module > Mute.

Note: Module input and output mutes can be controlled in Menu Mode via the MENU button. All mutes can also be controlled from the Lake Controller.

7.8.4.2. PLM+ Input Router Mute

The PLM+ Input Router mute provides the ability to simultaneously mute/unmute all modules or outputs that are sourced from the PLM+ input. To mute or unmute the PLM+ inputs:

1. Press METER until the Input Meter View is displayed

2. Press MUTE ENABLE

3. Use the associated dynamic function buttons to mute / unmute the PLM+ input router to the left.

Note: The PLM+ Input Router Mute is within the Lake Processing system, post input type selection, and pre input mixing and routing.

Please refer to the Lake Controller User Manual for details of mute selection via the software.

7.8.4.3. Module Input Mute

The Module input mute provides the ability to mute/unmute the audio signal at the module level. Therefore, the PLM+ Input Router (described in section 7.8.4.2) remains unmuted and can be used by another module. To mute or unmute a Module input:

1. Press METER until Home View is displayed

2. Press MUTE ENABLE

3. Use the associated dynamic function buttons to mute / unmute the Module inputs

Once the Module input is muted, the LED turns red and MOD. IN MUTE is displayed on the LCD. When unmuted, the LED turns green (unless any other output warning conditions are active).

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7. Front Panel Interface

Note: Fault condition LED indications take priority over mute status indications. If a fault condition occurs, the LED will indicate the fault by ashing and will note the mute status. When a Frame fault is active the audio on all channels is muted.

Module Input Mutes may also be controlled in Menu Mode.

Please refer to the Lake Controller User Manual for details of mute selection via the software.

7.8.4.4. Module Output Mute

Module Output Mute is part of the Lake Processing system, at the crossover outputs. It is post Module output EQ and level adjustment, pre PLM+’s protection circuitry.

Muting of the Module outputs is available via MUTE ENABLE in Module Meters view, as the PLM+ power output mutes are assigned in this mode (see section 7.8.4.5). However, Module output mute status and control are also available in Menu Mode and may also be viewed and controlled from the Lake Controller software.

Please refer to section 7.11.2.7 for details of selecting Module Output Mute in Menu Mode.

Refer to the Lake Controller User Manual for details of mute selection via the software.

7.8.4.5. Power Output Mute

The four dynamic function buttons to the right of the LCD control the Power Output Mutes of output channels 1-4. These mutes are located within the PLM+’s power output stage.

When a PLM+ power output is muted, the LED turns red and the text AMP CH. MUTE is displayed on the LCD. When unmuted, the LED turns green (unless any other output warning conditions are active).

Note: Fault condition LED indications take priority over mute status indications. If a fault condition occurs, the LED will indicate the fault and not the mute status.

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7. Front Panel Interface

LED Color Indication

Green Status Good / Unmuted

Yello w Warning

Red Fault / Muted

Flashing Red Clip

7.8.5. LED Fault, Warning and Clip Indication B

A tricolor LED is embedded inside each of the eight dynamic function buttons. These convey a variety of status indications including faults and warnings, signal clip indications, Module input mute, Module output mute and Power Output mute. Table 7.4 summarizes the meaning of the LED indications.

Table 7.4: LED Fault and Warning Indications

Note: An unlit output LED indicates either the channel is not available for the model in use, or that the power output channel is not routed to a Module output channel.

7.8.5.1. Clip Indication

The front panel LEDs also indicate input and output clip or pre-clip conditions that can occur within the PLM+.

Input Clip

Input clipping is monitored at two stages in the signal path:

• Analog Input Stage: If the input signal exceeds either +26 dBu, a clip indication is displayed.

• A warning is displayed at +24 dBu (i.e. 2 dB from Clip)

• Module Input Stage: If the signal level at this point exceeds +21 dBu, a clip indication is displayed.

Input clipping is indicated by the affected Module LED ashing red and INPUT CLIP displayed on the LCD. If a subsequent input clip within 400 ms is detected, the LED remains lit for a longer period.

Output Clip

All output channels are monitored by a suite of protection circuits that include a Current Peak Limiter (CPL) and an Inter-Sample Voltage Peak Limiter (ISVPL).

The ISVPL will indicate clip only when exceeding the amplier’s maximum output voltage. If the ISVPL is set so as to limit the output below maximum voltage, then clip indication will not occur when reaching the ISVPL threshold. Please refer to section 5.3 for further information.

If CPL protection is active, or a voltage clip occurs, then the associated Power Output Channel LED will ash red and a text warning will be displayed on the screen.

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7. Front Panel Interface

Warning Type LED No.

On Screen

Warning Text

Event Log Text

Amp Temp Limit Frame 1 ATL ACTIVE N/A

AES Clock Slipping Module 1 CLOCK SLIPPING AES Clock Slipping

Amp Temp Warning Channel 5-8 TEMP WARN:CH Temp Warning: Amp Channel

BEL Active Frame 1 BEL ACTIVE N/A

Controller Ofine Frame 1 CTRL OFFLINE N/A

Devic e Name Conict Frame 1 NAME CONFLICT Dante Device Name Conict

Frame O fine - 1 OFFLINE Frame O fine

Load Not Veri ed Module Channel

2+3

5-8

LOAD NOT VER LoadSmart: Load Not Verie d

Load Uncer tain Channel 5-8 UNCERTAIN LOA D Uncertain About Load Type

PSU Mains Glitch Frame 1 MA INS GLITCH Glitch on Mains Voltage Detected

PSU Power Limit Frame 1 PAL ACTIVE N/A

PSU Temp Limit Frame 1 PTL ACTIVE N/A

PSU Temp War ning Frame 1 TEMP WARN:PSU Temp Warning: Power Supply Unit

Sense Fault Frame 1 SENSE FAULT Frame Warning: Sense Fault

Speaker / Cable Shorted Channel 5-8 SPKR SHORTED Speaker / Cable Shorted

Speaker Over Count Channel 5-8 OVER SPKR CNT Over Speaker Count

Speaker Under Count Channel 5-8 UNDER SPKR CNT Under Speaker Count

Speaker Damaged Channel 5-8 SPKR DAMAGED Speaker Component Damaged

SpeakerSafe Not Star ted Channel 5-8 SPKSAFE INACT SpeakerS afe Not Started

SpeakerSafe Precision Low Channel 5-8 LM PREC. LOW Speaker Precision Low

Under Voltage Limit Frame 1 UVL ACTIVE N/A

7.8.5.2. Warning or Fault Indications

If certain parameters within the PLM+ approach or exceed preset limits, a warning condition or fault condition may arise. One or more LEDs provide a visual indication of the problem, along with an on-screen description of the condition displayed adjacent to the LED/s.

• A green LED conrms inputs or outputs are unmuted and operating normally

• A yellow LED signies a warning of potential problems in the PLM+ amplier stages

• A red LED indicates a fault, clip or mute

An Event Log le lists all warnings with date and time stamps; please refer to the Lake Controller Operation Manual for further information the Event Log.

Please refer to Table 7.5 and Table 7.6 below, and to Table 9.1 for a detailed description of faults and warnings.

7.9. Warning and Fault Indications

Table 7.5 lists the warning conditions signied by a yellow LED; Table 7.6 lists the fault conditions signied by a red LED.

Table 7.5: Warning Conditions (Yellow LED)

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7. Front Panel Interface

Warning Type LED No.

On Screen

Warning Text

Event Log Text

Amp Ch Mute Channel 5-8 AMP CH. MUTE Amp Channel Mute

Amp Temp Fault Channel 5-8 TEMP FLT:CH Temp Fault: Amp Cha nnel

Analog Input Fault Frame 1 ANALOG IN FAULT Frame Fault : Analog Input

Check AC Mains Frame 1 CHECK AC MAINS Frame Fault: Check AC Mains

Current Average Limiter Channel 5-8 CAL ACTIVE N/A

Current Protection Limiter Channel 5-8 CURRENT CLIP N/A

DSP Area Temp Fault Frame 1 TEMP FLT:DSP Temp Fault: DSP Area

Input Channel Mute Inp.Mix 2+3 INPUT MUTE Input Mute

Internal Audio Inter fac e Fault Frame 1 AUDIO FAULT Frame Fault: Audio Interface

Module Input Mute Module 2+3 MOD. IN MUTE Modu le Input Mute

Module Output Clip Module 2+3 MOD. CLIP N/A

Module Output Mute Channel 5-8 MOD. OUT MUTE Module Output Mute

No Input Source Ava ilable Module 2+3 NO INPUT No Input Source

No Load Detec ted at Output Channel 5-8 NO LOAD Channel Fault: No Load Detected

Physical In put Clip Module 2+3 INPUT CLIP N/A

Power Average Limiter Frame 1 PAL ACTIVE N/A

Power Channel Failure Channel 5-8 SERVICE CH. Channel Fault: Unit Need s Ser vice

PSU Area Temp Fault Frame 1 TEMP FLT:PSU Temp Fault: Power Supply Unit

PSU Fault / Undervoltage Frame 1 PSU FAULT Fram e Fault: PSU Under voltage

PSU Mains Over Voltage Peak Frame 1 MAINS > 400 V PK Fram e Fault: PSU Mains > 4 00 VPK

PSU Mains Over Voltage RMS Frame 1 MAINS > 270 V Frame Fault: PSU Mains > 270 V

PSU Mains Under Voltage Frame 1 MAIN S < 65 V Frame Fault: PSU Mains < 65 V

PSU Needs Service 1 Frame 1 NEEDS SERVICE: 1 Frame Fault: Needs Ser vice: 1

PSU Needs Service: 2 Frame 1 NEEDS SERVICE: 2 Frame Fault: Needs Ser vice: 2

PSU Needs Service 3 Frame 1 NEEDS SERVICE: 3 Frame Fault: Need s Ser vice: 3

PSU Needs Service: 4 Frame 1 NEEDS SERVICE: 4 Frame Fault: Needs Ser vice: 4

PSU Needs Service 5 Frame 1 NEEDS SERVICE: 5 Frame Fault: Need s Ser vice: 5

PSU Needs Service: 6 Frame 1 NEEDS SERVICE: 6 Frame Fault: Needs Ser vice: 6

PSU Needs Service 7 Frame 1 NEEDS SERVICE: 7 Frame Fault: Need s Ser vice: 7

PSU Needs Service: 8 Frame 1 NEEDS SERVICE: 8 Frame Fault: Needs Ser vice: 8

PSU Rail Protect Frame 1 PSU POWER PROT Frame Fault: PSU Power Protect

Shor t Circuit Protection Channel 5-8 SHORT CIRCUIT Channel Fault: Short Circuit Protection

Speaker Magnet Temp Fault Channel 5-8 TEMP FLT: MAG Temp Fault: Speaker Magnet

Speaker VC Temp Fault Channel 5-8 TEMP FLT: VC Temp Fault: Speake r Voice Coil

VHF Protection Channel 5-8 VHF FAULT Cha nnel Fault: Very High Frequency

Voltage Protection Limiter Channel 5-8 VOLTAGE CLIP N/A

Wrong Type of Speaker Channel 5-8 WRONG LOAD Load Type / Routin g Mismatch

Table 7.6: Fault Conditions (Red LED)

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7.10. Meter Mode

7.10.1. Home View

The default view when powering on the device is Meter Mode > Home View as shown in Figure 7.7.

Figure 7.7: Meter Mode > Home View

Home View provides a summary of Module I/O gain level and limiter gain reduction, along with frame, module and channel labeling information. The example in Figure 7.7 shows a mono 2-way, with Module A feeding power output channels 1 & 2, and Module B congured as CL1-way feeding a subwoofer on power output channel 3. Module C is congured for driving a full-range loudspeaker on power output 4. Module D is unused in this example.

Module A label, input gain meter, faults, warnings, clips & mutes.

Module B label, input gain meter, faults, warnings, clips & mutes.

Module A label, input gain meter, faults, warnings, clips & mutes.

Module D label, input gain meter, faults, warnings, clips & mutes.

Module output label for Power channel 1, gain & sum of Lake MAX-Peak, MAX-RMS and ISVPL gain reduction

faults, warnings, clips & mutes.

Module output label for Power channel 2, gain & sum of Lake MAX-Peak, MAX-RMS and ISVPL gain reduction

faults, warnings, clips & mutes.

Module output label for Power channel 3, gain & sum of Lake MAX-Peak, MAX-RMS and ISVPL gain reduction

faults, warnings, clips & mutes.

Module output label for Power channel 4, gain & sum of Lake MAX-Peak, MAX-RMS and ISVPL gain reduction

faults, warnings, clips & mutes.

Menu Bar: Current View title & Frame label, Frame faults and warnings. The menu bar is located by default at the top of the display, but can be congured in the front panel menu for placement at the bottom. The following indications, as active or applicable, also are shown on the menu bar.

Ω - AES3 Input Terminated (no icon = Unterminated)

- Analog Inputs Iso-Float Grounded (no icon = Floating)

- Dante Clock Master (no icon = Dante Slave or Dante Disabled)

- Dante Slave Only (no icon = device may be used as Dante Clock Master)

REDUNDANT - Dual Redundancy networking enabled. (No icon = congured for switch mode)

Please refer to Table 7.5 and Table 7.6 for full details on the faults and warnings that could be displayed in any of the above locations.

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7. Front Panel Interface

Note: Output limiter (gain reduction) meters take into account the sum of PLM+ ISVPL and Lake LimiterMax.

The icons in the center of the LCD indicate the amplier channel to which each module output is routed. When two amplier channels are Bridged, both channels will be displayed.

The type of icon used in the center of the screen conrms whether the PLM+ outputs are congured in Standard mode or Bridge Mode, as shown in Figure 7.8 For further information on Bridge Mode, please refer to section

8.1.1.

Figure 7.8: Standard and Bridge Mode Front Panel Icons

Bridge Mode is visible via this icon notation on the PLM+ Front Panel in Home View, however, the Lake Controller must be used to congure Bridge Mode; please refer to the Lake Controller Operation Manual for further information.

Home View looks similar for most congurations, with slight variations dependant on the PLM+ model and processor conguration.

7.10.2. Ampliﬁer Meters View

Amplier Meters View provides further signal level information in the form of additional power output meters as shown in Figure 7.9.

Figure 7.9: Meter Mode > Amplier Meters View

Output 1: V - Voltage Meter I - Current Meter P - Power Meter L - Gain Reduction Meter

Output 2: V - Voltage Meter I - Current Meter P - Power Meter L - Gain Reduction Meter

Output 3: V - Voltage Meter I - Current Meter P - Power Meter L - Gain Reduction Meter

Output 4: V - Voltage Meter I - Current Meter P - Power Meter L - Gain Reduction Meter

LoadPilot Status: 1. High Freq Pilot tone Enabled/Disabled, 2. Low Freq Pilot tone Enabled/Disabled, Status

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LoadPilot Status: 1. High Freq Pilot tone Enabled/Disabled, 2. Low Freq Pilot tone Enabled/Disabled, Status

Current View title & Frame label, Frame faults and warnings

• The Voltage Meter (V) indicates the power output stage voltage relative to its clip level

• The Current Meter (I) indicates the current the power output stage is driving into its load, relative to the maximum permissible current the xed CPL allows

• The Power Meter (P) indicates the instantaneous output power being developed in the load relative to the PLM+s maximum output power capability.

• The Gain Reduction Meter (L) indicates the degree of limiting being applied by the PLM+ ISVPL and/or the Lake LimiterMax.

7.10.3. Temperature View

Temperature View provides information about the current operating temperatures within the PLM+. Selected fuse type, as well as Mains Voltage and Current draw.

Figure 7.10: Meter Mode > Temperature View

Current View title. Power supply temp (PSU) & Lake processor temp (DSP) as percentage of maximum

Unused in Temperature View

Breaker Emulation Limiter; selected Fuse type - Mains Voltage - Mains Current Draw

Output 1: AMP - Temp of power output as percentage of maximum

Output 2: AMP - Temp of power output as percentage of maximum

Output 3: AMP - Temp of power output as percentage of maximum

Output 4: AMP - Temp of power output as percentage of maximum

Current View title & Frame label, Frame faults and warnings

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7. Front Panel Interface

7.10.4. Input Meters View

Input View enables inspection of the source selected to each input router; input signal level before the input mixer (i.e. prior to the Home View Module input meters); Module Input Mixer Routing; as well as Input Connection status.

Figure 7.11: Meter Mode > Input Meters View

Input Router 1: Selected input type, input gain level (relative to clip), router fault/warning/clip

Input Router 2: Selected input type, input gain level (relative to clip), router fault/warning/clip

Input Router 3: Selected input type, input gain level (relative to clip), router fault/warning/clip

Input Router 4: Selected input type, input gain level (relative to clip), router fault/warning/clip

Module A Input Mixer, Module A input level meter, Input 1 Connection Status

Module B Input Mixer, Module A input level meter, Input 1 Connection Status

Module C Input Mixer, Module A input level meter, Input 1 Connection Status

Module D Input Mixer, Module A input level meter, Input 1 Connection Status

Current View title & Frame label, Frame faults and warnings

7.10.5. Module Meters View

Module View provides further signal level information in the form of additional power output meters as shown in Figure 7.12.

Figure 7.12: Meter Mode > Module Meters View

Module A label and input gain meter

Module B label and input gain meter

Module C label and input gain meter

Module D label and input gain meter

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Output 1: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction

Output 2: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction

Output 3: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction

Output 4: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction

Current View title & Frame label, Frame faults and warnings

7.11. Menu Mode

7.11.1. Overview

The majority of functions can be accessed via Menu Mode on the front panel. These functions include the adjustment of gain, delay, limiters, input and output routing, and the ability to recall Frame Presets. Menu Mode can be accessed at any time by pressing the MENU button.

After pressing the MENU button, various submenu options are displayed as shown in the gure below.

Figure 7.13: Menu Mode > Main Menu

Press the illuminated button adjacent to the required option to display an associated submenu. When parameter level is reached, individual parameters may be selected for adjustment by pressing the adjacent button. The selected parameter value/s are highlighted, and are adjustable using the rotary encoder.

A parameter may be adjusted simultaneously across multiple channels by selecting all values to be adjusted; any current value offsets are retained. Some parameters default to multiple selections, with all inputs or outputs adjusted simultaneously. Changes are effected in real-time and are stored without further conrmation. Pressing EXIT returns to the previous menu level, automatically retaining any parameter changes.

Note: All parameters are also editable via the Lake Controller unless specied otherwise.

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7. Front Panel Interface

7.11.1.1. Parameters with Individual Values and Group Totals

The following parameters display two values:

• MODULE > GAIN

• MODULE > DELAY

• MODULE > LIMITERS > MAXRMS LEVEL

• MODULE > LIMITERS > MAXPEAK LEVEL

The Module parameter can be adjusted using the rotary encoder. The Group total (shown in brackets) is only adjustable using the Groups function in the Lake Controller.

The Group total is the sum of the individual Module value plus any values for this parameter on all Groups to which the Module is assigned. Please refer to the Lake Controller Operation Manual for further information on Groups.

7.11.1.2. Menu Structure Overview

From the Main Menu, the following submenus are available, as shown in Figure 7.13 and described in the following sections.

• MODULE (See section 7.11.2)

• Input Mixer

• Gain

• Delay

• Polarity

• Amp Gain

• Limiters

• Mute

• INPUT/OUTPUT CONFIGURATION (See section 7.11.3)

• Input Router 1 - 4

• AES Termination

• Iso-Float

• Output Router

• ATTENUATION (See section 7.11.4)

• FRAME (See section 7.11.5)

• Frame Information

• Frame Reset

• BEL Conguration

• Network

• Latency Match

• Front Panel

• FRAME PRESETS (See section 7.11.7)

• Preset Recall

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7. Front Panel Interface

• LOAD MONITOR (See section 7.11.8)

• Congure No. of Cabinets in Parallel

• LoadSmart Verication

• Estimated No. of Cabinets

7.11.2. Module Submenu

Only module output channels for routed Power channels are displayed. This applies to all module output congurations described below.

MENU > MODULE

After selecting the Module Menu, the screen shown in Figure 7.14 is displayed. Press the illuminated button adjacent to the required option to view or edit the associated parameters.

Figure 7.14: Module Submenu

7.11.2.1. Input Mixer

MENU > MODULE > INPUT MIXER

Press the illuminated button next to Input Mixers A – D. Selected mixer will show four Routers (1-4) adjacent to the right-hand buttons. Use buttons to select Router(s) and use the rotary encoder to change level values within dened limits to congure the mixer. Multiple Routers may be selected simultaneously.

Figure 7.15: Input Mixer

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

7.11.2.2. Gain

MENU > MODULE > GAIN

Figure 7.16: Module Gain Edit Screen

Press the illuminated button next to the module input/s and/or output/s for adjustment, and use the rotary encoder to change the value(s). Multiple gain values may be adjusted simultaneously in 0.1 dB increments, subject to dened level limits.

7.11.2.3 Delay

MENU > MODULE > DELAY

Press the illuminated button next to the input/s and/or output/s for adjustment, and use the rotary encoder to change the value/s. Multiple delay values may be adjusted simultaneously in 0.1 ms increments, subject to dened level limits.

The audio signal may be delayed (typically for reasons of driver or delay subsystem alignment) at either the Module inputs or on individual outputs. Delay added at the inputs affects all outputs equally, and will be generally be introduced to time-align arrays of loudspeakers at different locations. Delaying individual outputs may be desirable to time-align drivers in the same cabinet or array.

7.11.2.4. Phase (Polarity)

MENU > MODULE > PHASE

Press the illuminated button next to the input/s and/or output/s to be adjusted, and use the rotary encoder to change the value/s. Phase may be changed on one input or output at a time.

Audio phase reversal is available at the inputs to Modules A - D, and also individually on the four output channels. The LCD displays ‘Positive’ for normal operation and ‘Negative’ when the phase is inverted.

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

7.11.2.5. Amp Gain

MENU > MODULE > AMP GAIN

By default, all outputs are selected; use the rotary encoder to change the gain of all power outputs or press the associated output button to deselect one or more outputs.

Amp Gain adjusts the gain of the PLM+’s power output stage for each output channel. The default setting is 35 dB, variable in 0.1 dB increments from 22 dB to 44 dB. Care should be taken in altering Amp Gain, which should be adjusted in conjunction with the Gain controls and limiter thresholds.

7.11.2.6. Limiters

MENU > MODULE > LIMITERS

Various parameters of the PLM+’s Inter-Sample Voltage Peak Limiter (ISVPL) and the Lake LimiterMax can be adjusted via this submenu. By default, simultaneous adjustment of most limiter parameters across all output channels is selected, although channels may be adjusted individually if required. Attack and Release times must be adjusted individually per module DSP channel.

Inter-Sample Voltage Peak Limiter Threshold (ISVPL Threshold)

The ISVPL prevents the voltage of the PLM+ outputs from exceeding a pre-determined value. The ISVPL Threshold can be adjusted between 17.8 V to 600 V, which represents the instantaneous peak voltage, not the RMS value of the output signal. The actual value is displayed in brackets and can be limited by the maximum voltage a particular PLM+ Series model can produce and/or by the RPM Power allocation algorithm. If RPM is active, “RPM” will be displayed next to the Actual ISVPL values.

Inter-Sample Voltage Peak Limiter Prole (ISVPL Prole)

Selecting the ISVPL Prole will optimize the ISVPL limiting for the specic frequency band. ISVPL Prole permits individual adjustments per channel between six proles, providing appropriate attack and release times for the ISVPL Limiter and Voltage Clip feedback to either minimize distortion or maximize SPL as described below.

1. Universal – Inter Sample, Optimized for low distortion, usable for all frequencies

2. Sub/LF – Inter Sample, Optimized for higher SPL below 600 Hz, usable for all frequencies

3. Sub – Optimized for high SPL, 20 - 200 Hz

4. LF – Optimized for high SPL, 20 - 1200 Hz

5. MF – Optimized for high SPL, 300 - 6000 Hz

6. HF – Optimized for high SPL, > 1 kHz

The default ISVPL Prole is UNIVERSAL.

MaxPeak Level (MaxPeakLvl)

This sets the maximum peak signal level at the Module outputs. It is adjustable from -30 dBu to +30 dBu in 0.1 dB increments, subject to user-dened level limits. The Group total is displayed (in brackets) for each channel.

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

MaxRMS Level (MaxRMSLvl)

This sets the maximum RMS signal level at the Module outputs. It is adjustable from -30 dBu to +30 dBu in 0.1 dB increments, subject to user-dened level limits. The Group total is displayed (in brackets) for each channel.

MaxRMS Corner (MaxRMSCor)

A soft-knee or hard-knee corner may be applied to the RMS Limiter. A soft-knee corner gently increases limiting as the signal approaches the threshold; a hard-knee corner applies full limiting to any signal exceeding the threshold by any amount, but none to signals below the threshold.

The Corner parameter is adjustable in 0.1 dB increments, subject to dened level limits. This gure represents the level below the limiter threshold at which compression commences; the larger this negative value, the softer the knee. A setting of 0 dB implies a hard-knee characteristic.

Note: LimiterMax provides peak and RMS limiting features, referred to as MaxPeak and MaxRMS respectively. Full details regarding LimiterMax can be found in the Lake Controller Operation Manual.

MaxRMS Attack

The attack time may be set for the RMS Limiter. Limiter release values are set separately for each of the four outputs in 0.10 ms increments.

MaxRMS Release

The release time may be set for the RMS Limiter. Limiter release values are set separately for each of the four outputs in 0.10 ms increments.

7.11.2.7. Mutes

MENU > MODULE > MUTES

In Meter Mode, Module inputs and PLM+ power output channels can be muted using the MUTE ENABLE function. The MUTE menu also provides mute status and control of the Module input mutes, but instead of the PLM+ power output channel mutes, it provides the ability to mute the Lake Module outputs.

Press the associated dynamic function button/s to select the Module input/s and/or Module output/s to be adjusted. Use the rotary encoder to toggle between the MUTED and UNMUTED states.

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

7.11.3. I/O Conﬁguration

MENU > I/O CONFIG

Figure 7.17: I/O Conguration Sub Menu

This menu provides conguration options for input routing, along with settings for AES Termination and Iso-Float as described in the following sections.

7.11.3.1. Input Router Conﬁguration

MENU > I/O CONFIG > ROUTER

Figure 7.18: Input Router 1

The signal ow diagrams in chapter 6 highlight that there are four Input Routers available on PLM+ Series devices. The input that is selected within the router can be used by the Input Mixer for any of the modules.

Each router has four priority levels allowing any input to be placed in a sequence providing automatic input signal fail over. Dante and AES3 inputs have priority over analog inputs.

Note: Only one analog input is allowed in each router, and the analog input must be at the lowest priority level in relation to any other inputs.

Two modes of input selection are available, Auto Select and Forced Selection. The selected setting is also visible from the I/O STATUS screen on the front panel, and via the Lake Controller.

In Auto Select mode, Priority 1 is checked for a valid input signal; if no signal is found, Priority 2 is checked, and so on until a valid signal is located; this process occurs if the currently selected input fails. In Forced Selection mode, one of the four priorities is xed regardless of whether a valid signal is present.

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

With a router selected on the front panel, press the middle button on the left of the LCD to activate this parameter for editing. Use the illuminated rotary encoder to scroll through the following options:

• Auto Select (default)

• Force Priority 1

• Force Priority 2

• Force Priority 3

• Force Priority 4

Assignment of Input Priority

Factory default settings assign Dante 1-4 to Priority 1, Dante 5-8 to Priority 2, AES3 1-4 to Priority 3 and Analog 1-4 to Priority 4. For example, for Input Router 1 Dante 1 on Prio1, Dante 5 on Prio2, AES3 ch1 on Prio 3 and Analog 1 on Prio 4

To change these settings via the front panel, select Priority slot number to be changed and use the rotary encoder to scroll through the available options. Due to the signal hierarchy it is not possible to assign an analog source to a higher priority than a digital source.

Analog Input Sensitivity and Digital Gain Offset

Press a dynamic function to the right of the LCD to toggle the selection of input source and input sensitivity/digital gain offset then use the rotary encoder to change the parameter.

The maximum input level accepted by the analog input pre-ampliers without clipping is 26 dBu. Digital gain offset may be applied to Dante or AES3 digital input signals in 0.1 dB increments from -100 dB to +15 dB.

7.11.3.2. AES3 Input Termination

MENU > I/O CONFIG > AES TERM

Figure 7.19: AES Termination

To adjust the AES3 Input Termination, select AES TERM from the Input Cong menu then use the rotary encoder to toggle the value. An icon is displayed in the bottom left of the display in Meter Mode when AES is set to ‘Terminated’.

For fault-free operation when using AES3 digital audio as an input source, inputs must be correctly terminated with the characteristic impedance of 110 ohm. The Input Termination setting is determined by the method used to distribute the AES3 signals.

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

The PLM+ device at the end of a distribution line should be set to TERMINATED; all other PLM+ devices should be set to UNTERMINATED. If an AES3 distribution amplier (DA) is being used to distribute the digital audio signals, with one DA output per processor, then all terminations should be on. However, if the AES3 is daisy-chained, only terminate the last PLM+ device in the chain.

7.11.3.3. Iso-Float

MENU > I/O CONFIG > ISO-FLOAT

Figure 7.20: Iso-Float

To change the Iso-Float setting, adjust the value using the rotary encoder. The current settings are also displayed on the front panel I/O STATUS screen.

The analog inputs utilize Iso-Float transformerless electronic balancing circuitry. This provides electrical isolation from an analog source comparable to that achieved with transformer-based designs. However, pin 1 of the XLR input connector may be connected to ground within the device if desired. This option is selected by using the rotary encoder to toggle between FLOATING and GROUNDED.

It may be necessary to change this setting to resolve ground loop problems when using analog inputs.

7.11.3.4. Output Router

MENU > I/O CONFIG > OUTPUT RTR

With PLM+ Series, Module output routing to Power outputs as well as AES or Analog to Dante output routing is accessible through the Front panel interface.

Figure 7.21: Output Router

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

Toggle the Source from which you want to route the channels (Module, Analog, AES)

Toggle up among the available source channels

Toggle down among the available source channels

Unused

Toggle left among the available outputs

Toggle right among the available outputs

Disconnect all Dante assignments

Turn Right to Route / Turn Left to Un-route

Use the arrows visible on the display (2-3, 6-7) to toggle between available sources and outputs. Use the rotary encoder to select the output you want to connect to (power outputs or Dante). Selected output is marked with an “X” when routed and “O” when not routed.

Selecting 8 brings up a warning screen.

7.11.4. Attenuation Submenu

MENU > ATTENUATION

The default setting of 0.00 dB (i.e. no attenuation) is adjustable in 0.25 dB increments down to -100 dB. Adjustment of attenuation at the input to the PLM+ power stage is available on a per-channel basis. This adjustment is the PLM+ equivalent of a conventional amplier level control. The power output channels may be turned down using these parameters before powering on or off. Please refer to the signal ow diagram in Figure 6.2.

By default, all channels are deselected. Press the SEL ALL button to select/deselect all channel, or, press a single button on the right to adjust a channel individually.

Note: Only ONE channel or ALL channels may be adjusted. It is not possible to adjust only two or three channels.

7.11.5. Frame Submenu

MENU > FRAME

The Frame Menu provides information and options relating to the device PLM+ as a physical unit. It is referred to as a Frame for consistency with Lake Controller terminology.

The Frame Label as dened in the Lake Controller is displayed in this menu. It is also displayed at the top-left of the screen in Meter Mode, Home View.

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

7.11.5.1. Frame Info

MENU > FRAME > FRAME INFO

Frame Info provides information about the device settings and conguration. All data in this front panel menu is read-only; some parameters are xed, and some can be changed only via the Lake Controller software.

Firmware Version (FW Version)

The rmware version numbers are displayed on left side of screen. This information can be used to verify that the latest rmware is installed and is useful if a technical issue arises.

Further internal version numbers are displayed on right side of screen; Bundle, DSP, FPGA and Safe Image version.

Serial Number (Serial No.)

The printed serial number on the back panel of the PLM+ is also electronically embedded in the hardware, and therefore cannot be removed or altered if stolen.

Max Output Voltage (MaxOutVolt)

Displays the maximum output voltage per channel that can exist across the PLM+’s output terminals. This is the absolute maximum, not the voltage dened by the ISVPL setting.

Note: When Bridge Mode is activated, double the channel output voltage is available.

Max Output Current (MaxOutCurr)

Displays the maximum output current that can be delivered by the PLM+, summed across all output channels.

7.11.5.2. Frame Reset and Conﬁguration

MENU > FRAME > RESET

Use this option to display a further menu with options to reset all parameters back to their original factory default values. See section 9.3 for a full list of the default factory reset parameter values. Two types of reset are provided: Factory Reset and Soft Reset.

Factory Reset

A Factory Reset will reset all settings and parameters to the original factory-dened default values. This includes the deletion of any Frame Presets stored within the device. It also resets the IP Address and all network related settings including the Dual Redundancy setting; a hard power cycle is required to complete this reset.

Soft Reset

A Soft Reset will reset all settings and parameters to the original factory-dened default values, but retains Frame Preset information and IP / Network conguration. A power cycle is not required to complete this type of reset.

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

7.11.5.3. Breaker Emulation Limiter

MENU > FRAME > BEL CONF

The Breaker Emulation Limiter (BEL) provides Ampere selection (5-32 A) and breaker type selection (CONSERVATIVE, FAST and UNIVERSAL). Select by pressing the adjacent button then use the rotary encoder to change the parameter.

The maximum RMS input current varies between the 12K44 and 20K44; therefore, a desired value is congured and the actual value is displayed within brackets.

7.11.5.4. Network

MENU > FRAME > NETWORK

Pressing the NETWORK button displays a further screen containing network conguration information. All parameters (except Redundancy) are view-only on the front panel and are either not editable, or can only be adjusted via the Lake Controller.

A summary at the top right of the screen conrms whether a valid connection is present for both Ethernet ports, and whether the Lake Controller is online.

• IP Addr: Displays the Internet Protocol address for the selected unit and can only be changed via the Lake Controller software. Please refer to the Lake Controller Operation Manual for further details.

• MAC: Displays the unique Media Access Control Ethernet address for the processor. This value cannot be changed.

• Frame ID: Displays the Frame ID, a unique Lake product identier that cannot be changed.

• Primary and Secondary network connection status as well as Lake Controller connection status

• Mask: Displays the IP address subnet mask for the selected unit and can only be changed via the Lake Controller software. Please refer to the Lake Controller Operation Manual for further details.

• IP Cong: Displays the IP conguration of the device (Auto - Zero Conf, Auto - DHCP or Fixed IP)

• Redundancy: Displays the dual redundancy status for the Frame (ON/OFF) This mode can be changed by pressing the adjacent button and conrming on the following dialog screen. Changing redundancy mode requires a power cycle to activate.

7.11.5.5. Latency Match

To turn Latency Match on or off, select the parameter using the adjacent button then change the status using the rotary encoder.

By default, PLM+ products exhibit the exact same input-to-output latency as the PLM and D Series products. However, the PLM+, PLM and D Series products have a greater latency compared to the Lake processors of LM Series. By enabling the Latency Match feature, the LM Series will add delay to match overall processing delay of the PLM, PLM+, and D Series. This regards Analog and AES only. Dante is not part of Latency match.

Exception: Latency match will not function correctly when running 48k based AES input using the primary clock domain.

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

7.11.6. Front Panel Display Controls

MENU > FRAME > FRONT

Contrast

To adjust the front panel LCD contrast, select this option then use the rotary encoder to change the value.

Dimming

To adjust the front panel LCD & LED brightness, select this option then use the rotary encoder to change the value.

Channel Order

To adjust the order in which both inputs and outputs are displayed on the front panel in all views, select this option then use the rotary encoder to change the value between TOP-DOWN (default) and BOTTOM-UP.

7.11.7. Frame Preset Menu

MENU > FRAME PRST

To recall an existing Frame Preset, use the rotary encoder to select the required Preset then press the RECALL button to overwrite the current conguration.

Note: Frame Presets must initially be created in the Lake Controller, and stored as a Preset using the Lake Controller or the PLM+ Series Preset Manager.

Up to 100 Frame Presets can be stored in the device. The data within a Frame Preset includes the conguration of all Modules in the Frame including levels, crossovers, EQ, input mixer, and output routing. (Note that Network settings and the Dual Redundancy setting are not part of Frame Presets.)

As Frame Presets are stored within the device, complete processor congurations can be recalled without connecting the device to a PC.

7.11.8. Load Monitor Menu (LoadSmart)

MENU > LOAD MON

Figure 7.22: LoadSmart Verication Results Screen

PLM+ SERIES Operation Manual rev 1.0.0

7. Front Panel Interface

7.11.8.1. Conﬁgure # of Cabinets in Parallel

This option allows selection of the number of speaker cabinets connected to each PLM+ output channel. Select individual or multiple outputs and use the rotary encoder to set the value from 1 to 4. This value is used by LoadSmart to conrm the correct connection and status of the speakers connected to each PLM+ channel.

7.11.8.2. LoadSmart Veriﬁcation

Select this option to initiate LoadSmart verication, then select YES to continue. LoadSmart performs a rapid test of all output channels, and displays the results on the LCD a few seconds later.

Figure 7.23: LoadSmart Verication Results Screen

The Load Results page provides three items of information per output channel:

• Conrmation that the speaker connected matches the speaker ngerprint assigned to the channel. If no Fingerprint is assigned, NO MODEL will be displayed. If the wrong speaker is connected; “Wrong Speaker” will be displayed

• Result of speaker cabinet count; this will either be OK or WRONG.

• Estimated number of speakers connected to the channel.

PLM+ SERIES Operation Manual rev 1.0.0

8. Back Panel Interface

SPEAKER OUTPUTS

INPUT 1 INPUT 2 INPUT 3

AES/EBU

INPUT 1-2 INPUT 3-4

SECPRIM

Must be grounded/earthed

Made in Sweden

PIN 1: SCRN 2: POS 3: NEG

ANALOG WITH ISO-FLOAT

50-60Hz

100-240V 2400-2950W

INPUT 4

SWITCHED 00/ 000 Base-TX1 1

1Gbps 1Gbps

LINK

ACT

LINK

ACT

PLM 2K44

8. Back Panel Interface

An overview of the back panel interface is provided in section 4.2. This chapter describes each cluster of connections as shown in Figure 8.1.

3 4 51

1Gbps 1Gbps

ACT

INPUT 4

INPUT 1-2 INPUT 3-4

AES/EBU

SWITCHED 00/ 000 Base-TX1 1

CH 3

CH 4

CLASS 3 WIRING

INPUT 1 INPUT 2 INPUT 3

ANALOG WITH ISO-FLOAT

PIN 1: SCRN 2: POS 3: NEG

SPEAKER OUTPUTS

CH 1

CH 2

Ser. N:o

BRIDGE

Removed!

SECPRIM

LINK

PLM 2K44

Made in Sweden

100-240V 2400-2950W

Must be grounded/earthed

CLASS 3 WIRING

1+/- CH 1+/2+/- CH 2+/-

BRIDGE CH 1 & 2:

1+/- CH 1+/-

3+/- CH 3+/-

1+:+

2+/- CH 2+/-

4+/- CH 4+/-

2- : -

1+/- CH 3+/2+/- CH 4+/-

BRIDGE CH 3 & 4: 1+ : +, 2- : -

Figure 8.1: Back Panel Interface

8.1. Speaker Outputs

The PLM+ is available with either 4 mm binding posts or Neutrik speakON connectors for the outputs.

50-60Hz

The outputs of the PLM+ can produce a high voltage. Do not connect or disconnect loudspeaker/s while the PLM+ is powered on. Never operate the PLM+ with any portion of bare loudspeaker wire exposed.

For speakON connector versions, do not use mating plugs without the rear covers in place.

8.1.1. Bridge Mode

Power outputs may be bridged on all PLM+ models by following the conguration instructions in the Lake Controller Operation Manual (I/O CONFIG > OUTPUT CONFIGURATION) and the wiring instructions in this chapter. Bridge Mode can only be activated/deactivated using the Lake Controller software.

Note: When Bridge Mode is activated, CLASS 3 wiring is required.

PLM+ SERIES Operation Manual rev 1.0.0

8. Back Panel Interface

Channels 1 - 4

8.1.2. speakON Connectors

On both PLM+ models, the power outputs are simultaneously available on a single 8-pole speakON connector, and on two 4-pole speakON connectors. The two 4-pole connectors carry the outputs of channels 1 & 2 and 3 & 4 respectively.

SPEAKER OUTPUTS

CLASS 3 WIRING

1+/- CH 1+/2+/- CH 2+/-

BRIDGE CH 1 & 2:

1+/- CH 1+/2+/- CH 2+/-

3+/- CH 3+/4+/- CH 4+/-

1+:+ 2- : -

1+/- CH 3+/2+/- CH 4+/-

BRIDGE CH 3 & 4: 1+ : +, 2- : -

Figure 8.2: speakON Connections

NL4 PLM+ Output

Channels 1 & 2

NL4 PLM+ Output Channels 2 & 1

BRIDGE MODE

NL4 PLM+ Output

Channels 1 & 2

Figure 8.3: speakON wiring and pinouts (Bridge Mode)

NL4 PLM+ Output Channels 1 & 2

NL8 PLM+ Output

NL4 PLM+ Output Channels 3 & 4

Figure 8.4: speakON NL4/NL8 Conguration

PLM+ SERIES Operation Manual rev 1.0.0

8. Back Panel Interface

2 -

4 -

NL4 PLM+ Output Channels 1 & 2

NL8 PLM+ Output Channels 1 - 4

NL4 PLM+ Output Channels 3 & 4

Figure 8.5: speakON NL4/NL8 Conguration

8.1.3. Binding Post Connectors

Binding post versions of the PLM+ are tted with four pairs of black and red 4 mm binding posts.

SPEAKER OUTPUTS

CH 1

BRIDGE

CH 2

Figure 8.6: Binding Post Conguration

CH 3

CH 4

CLASS 3 WIRING

SPEAKER OUTPUTS

CH 1

BRIDGE

CH 2

CLASS 3 WIRING

Figure 8.7: Binding Post Conguration (Bridge Mode)

CH 3

CH 4

PLM+ SERIES Operation Manual rev 1.0.0

8. Back Panel Interface

Connect the ‘+’ loudspeaker terminals to the red binding posts and the ‘ – ‘ terminals to the black binding posts. There are three methods of connecting speaker cables to the binding posts.

1. Solder 4 mm banana-plugs to the ends of the speaker wires and plug into the center of the turrets.

2. Thread the stripped ends of the wires through the holes in the posts. Enter the wires for output channels 1 and 3 from above and for channels 2 and 4 from below. Tighten the plastic turrets by nger only, being careful not to overtighten.

3. Crimp 4 mm insulated spade terminals onto the ends of the wires and push into the binding post assembly from above (Ch. 1 & 3) or below (Ch. 2 & 4). The hole in the post is ignored. Hand tighten plastic turrets, being careful not to overtighten.

8.2. Analog Inputs

8.2.1. Analog Input XLR Connections

Four electronically balanced analog inputs are provided via latching XLR3F connectors.

INPUT 1 INPUT 2 INPUT 3

ANALOG WITH ISO-FLOAT

INPUT 4

PIN 1: SCRN 2: POS 3: NEG

Figure 8.8: Analog Input XLR Connections

8.2.2. Analog & AES3 XLR Wiring and Pin Out

All XLR connections are wired to IEC268 as shown in Figure 8.9.

Figure 8.9: IEC268 XLR Wiring and Pin Out

Pin 1: Ground / Shield Pin 2: Hot (+) Pin 3: Cold (-)

PLM+ SERIES Operation Manual rev 1.0.0

8. Back Panel Interface

8.2.3. Unbalanced Operation

Balanced connections are recommended where possible. However, if it is necessary to drive the device from equipment with an unbalanced output, wire the inputs as shown in Figure 8.10.

HOT

COLD

SCRN

Unbalanced Output (Typically phono)

Figure 8.10: Balanced to Unbalanced Analog Wiring and Pin Out

The method shown in Figure 8.10 uses twin-and-screen (balanced) cable and standard XLR pin connections at the PLM+ Series device end, with the cold wire and the cable screen connected to the signal ground of the equipment at the source end.

HOT

COLD

SCRN

Balanced Input (XLR)

This usually provides better noise and hum rejection than the more common method of joining pins 1 and 3 together in the XLR. However, if only a single-core (unbalanced) cable is available, the method shown in Figure 8.15 may be used.

HOT

SCRN

Unbalanced Output (Typically phono)

Figure 8.11: Unbalanced Analog Wiring and Pin Out

HOT

SCRN

Balanced Input (XLR)

8.2.4. Iso-Float Electronic Balancing

The analog input electronic balancing circuits use the Lake Iso-Float system.

The Iso-Float technology combines the benets of transformer-coupled isolation with the advantages of clean, direct-coupled inputs. The audio converters are galvanically isolated, and not connected to the main ground. Highquality transformers and opto-isolators create a barrier between the device and possible grounding aberrations from the outside electrical environment.

Iso-Float settings are adjustable via the front panel menu or the Lake Controller software.

PLM+ SERIES Operation Manual rev 1.0.0

8. Back Panel Interface

8.3. AES3 Digital I/O

8.3.1. AES3 XLR Connector

AES3 digital audio input is via two XLR3F connectors. Connectors are provided for Inputs 1 & 2 and Inputs 3 & 4. Wiring of this connector follows the same standard as for analog XLR connections as shown section 8.2.2.

The AES3 signal format carries two channels of audio and associated data on a single cable/connector. Selection of input channels is performed within the digital processing section of the PLM+ and is controlled from the menu system. Please refer to section 7.11.3.1 for further details.

INPUT 1-2 INPUT 3-4

AES/EBU

Figure 8.12: AES Inputs

8.4. RJ45 etherCON Network Connections

Two RJ45 etherCON style network connections are provided as shown in Figure 8.13.

1Gbps 1Gbps

ACT

LINK

SWITCHED 00/ 000 Base-TX1 1

Figure 8.13: etherCON Network Connectors

The switched 100/1000 Base-T network connections auto-sense whether standard or crossover Cat-5e cables are in use. The green ACT LED illuminates (ashes) to show network activity, and when a 100 Mbps connection is present; the orange LED illuminates (static) to indicate a 1000 Mbps connection.

Pre-made cables with moulded RJ45 plugs are recommended. If it is necessary to make up custom Cat-5e network cables, use pinout described in Table 8.14.

SECPRIM

ACT

LINK

PLM+ SERIES Operation Manual rev 1.0.0

Table 8.14: RJ45 Wiring & Pin Out Description

Pin No. Color

1 Brown

2 Brown + White

3 Green

4 Blue + White

5 Blue

6 Green + White

7 Orange

8 Or ange + White

8. Back Panel Interface

Figure 8.15: RJ45 Wiring & Pin Out Diagram

When the device is connected to an active network, the yellow LINK LED illuminates above the connector in use. Data activity on the network is indicated by illumination of the green ACT LED. It is normal for the ACT LED to icker either sporadically or continuously.

8.4.1. Primary Network Connection

The Primary Network connection is used for Lake Controller connectivity and Dante digital audio. Please refer to section 4.2 for additional information.

8.4.2. Secondary Network Connection

The Secondary Network connection may be used for a redundant Dante digital audio network. Please refer to section 4.2 for additional information.

PLM+ SERIES Operation Manual rev 1.0.0

8. Back Panel Interface

powerCON pin 230 V Version 115 V Version

L Brown Black

N Blue White

Green/Yellow Green

8.5. Power Inlet

8.5.1 Power Connector

A Neutrik NAC3 Series powerCON connector rated at 32 A is tted to the rear of the PLM+ for AC mains input. The power cable (AC cord) supplied with the PLM+ has the mating connector ready-tted, but may require a mains (AC) plug specic to your country to be tted to the other end. The wiring an pinout details are shown in Table 8.2.

Table 8.16: powerCON Connector Wiring and Pinout

PLM+ SERIES Operation Manual rev 1.0.0

9. Appendix

Category/Type Name On screen text Description Action

FRAME

Warning

Lake Controller ofine CTRL OFFLINE

Frame unable to  nd Lake controller

on the network

Check network cabling/

network if controller

expected on the network

Warning

AES clock slipping CLOCK SLIPPING

Frame not able to lock to

incoming A ES stream

Check AES sender and

clock conguration

Warning

Dante device na me conict NAME CONFLICT

Two or more devices on the network

with the same Dante name

Review Dante

conguration

Warning

Dante module not detected

DANTE NEEDS

SERVICE

Lake cannot detect a functioning

Dante module

Restart device; if not

cleared it needs service

to operate Dante

Warning

Dante module with

incompatible rmware

DANTE FW INVALID

Dante module not loaded

with correct FW

Retry updating the rmware

with LakeUpdate

Fault

Audio Fault AUDIO FAULT

Internal audio interface

not functioning

Restart device; if not

cleared it needs service

Fault

Sense fault D SP SENS FLT:DSP

Voltage and current sensing on amplier

output fault y. Audio continues but

protection might be compromised.

No load monitoring

Restart device; if not

cleared it needs service

Fault

A/D converter power

supply fault

A/D P SU FAULT

Voltage supply to the analog input

converters faulty

Restart device; if not

cleared it needs service for

analog input to work

TEMP

Warning

Temperature warning

power supply

TEMP WARN:PSU

Power supply temperature

approaching critical levels

Improve cooling or reduce

output power to avoid

temperature becoming

critical

Warning

Temperature warning

DSP area

TEMP WARN:DSP

DSP area temperature approaching

critical levels

Improve cooling or reduce

output power to avoid

temperature becoming

critical

Warning

Power supply

Temperature Limit

PTL ACTIVE

Amplier is reducing output power

to avoid power supply temp

fault protection

Improve cooling or reduce

output power to avoid

limiting

Warning

Amp channel

Temperature Limit

ATL ACTI VE

Amplier channel is reducing output

power to avoid amplier channel

temp fault protection

Improve cooling or reduce

output power to avoid

limiting

Fault

Temperature fault

power supply

TE MP F LT: P S U

Power supply temperature reached

internal protection limit

Automatically restarts

when cooled down

Fault

Temperature fault

DSP area

TE MP F LT: D S P

DSP area reached

critical temperature

Improve cooling or

reduce power

9.1. Faults and Warnings Overview

9. Appendix

PLM+ SERIES Operation Manual rev 1.0.0

9. Appendix

Category/Type Name On screen text Description Action

PSU

Warning

Under Voltage Limit UVL ACTIVE

The Under Volt age limiter is active as the

mains supply is approaching the lower

end of the device´s operational voltage.

Output power is decreased to ensure

mains distribution does not collapse

Increase mains distribution

stiffness or reduce output

power to avoid limiting

Warning

Power Average Limit PAL A CTIVE

Amplier is reducing output power due

to average power or mains current

draw is above safe operating levels

Reduce output power

to avoid limiting

Warning

Breaker Emulation Limit BEL ACTIVE

Power supply is reducing mains current

draw to stay within B EL congured

nominal current and prole

Improve mains distribution

and update BEL

conguration or reduce

output power to avoid

limiting

Warning

Mains supply glitch MAINS GLITCH

Mains glitch (missing cycles) was

detected on the mains inlet

Check mains distribution/

connection

Warning

Upgrade power supply rmware

UPGRADE PSU

Power supply rmware version not

compatible with amplier

Upgrade amplier

rmware

Fault

Need service NEED SERVICE:1-8 Power supply internal error

Restart device; if not

cleared it needs service

Fault

Mains voltage above

400 volt peak

MAINS>400 VPK

Power supply detects mains voltage above 40 0 volt peak. Protective shut

down, auto restart attempt

Check mains distribution/

connection

Fault

Mains voltage above

270 V

MAINS>270 V

Power supply detects mains voltage

above operation voltage. Protective

shut down, auto restart attempt

Check mains distribution/

connection

Fault

Mains voltage below

65 V

Mains<65 V

Power supply detects mains voltage

below operation voltage. Protective

shut down, auto restart attempt

Check mains distribution/

connection

Fault

Power supply fault PS U FA ULT Internal power supply fault

Check mains distribution/

connection. Restart

device; if not cleared

it needs ser vice

Fault

Check mains CHECK MAINS

Power supply detects unstable mains

supply. Protective shut down, auto

restart at tempt

Check mains distribution/

connection

Fault

Power supply power protect PSU P OWER PROT

Too high output power for too low mains

supply voltage. Protective shut down,

auto restart attempt

Improve mains supply

voltage or reduce

output power

LOAD

Warning

Speaker short SPKR SHORT Both LoadPilot tones below thresholds Check load or calibration

Warning

Speaker damaged SPKR DAMAGED

One LoadPilot tone is above

or below threshold

Check load or calibration

Warning

Under speaker count UNDER SPKR CNT

Both LoadPilot tones above thresholds

or LoadSmart detected fewer

speakers than expected

Check load and

cabling alibration

PLM+ SERIES Operation Manual rev 1.0.0

Category/Type Name On screen text Description Action

Warning

More speakers OVR SPKR COUNT

LoadSmart detected more speakers

than expected

Check load and

cabling or ngerprint

Warning

Uncertain about load UNCERTAIN LOAD LoadSmart uncertain about load

Check load and

cabling or ngerprint

Warning

Load not veried LOAD NOT V ER LoadSmart not veried

Perform LoadSmart

verication

Fault

No load NO LOAD

At least one LoadPilot tone above

measurable area or signicantly

above thresholds

Check load or calibration

Fault

Wrong load W RONG LOAD

LoadSmart detected impedance

response output model

Check load and

cabling or ngerprint

Fault

Short circuit SHORT CIRCUIT

LoadPilot or full frequency analysis

below shor t threshold or hardware

short protection

Check load and cabling

AMP

Warning

Temp warning ampli er

channel

TEMP WARN

Amplier channel is approaching

critical temperature

Improve cooling or reduce

output power to avoid

temperature becoming

critical

Fault

Temp Fault amplier channel T E MP FAULT

Amplier channel has reached

internal protection limit

Automatically unmutes

when cooled down

Fault

Service channel SERVICE CH. Amplier channel is damaged

Restart device; if not

cleared it needs service

Fault

Very high frequency fault V HF FAULT Amplier channel protection Check input signal

Clip

Current average limiter CAL ACTIV E

Average current on amplier

above safe operating level

Reduce output power

to avoid limiting

Clip

Current clip CURRENT CLIP

Amplier channel reached

current limit

Reduce output power

to avoid limiting

Clip

Voltage clip VOLTAGE CLIP Amplier reached voltage limit

Reduce output power

to avoid limiting

Clip

Module clip MOD. CLIP Module output signal clipped

Review gain structure.

Module gain vs AmpGain

SIGNAL

Fault

No input source NO INPUT

Input router has no valid

input source

Review input router

settings/connections

Clip

Analog/AES input clip INPUT CLIP

The signal on the analog/AES input

is above inputs capability

Lower the signal on the

feed to the amplier

9. Appendix

Table 9.1: Warning, Fault and Mute Indications (alphabetical by LCD Text / Event Log Text)

PLM+ SERIES Operation Manual rev 1.0.0

9. Appendix

9.2. Maintenance

During normal operation this devices provides trouble-free service. If the LCD or front panel display requires cleaning, use a soft cloth only; do not use solvent cleaners. The dust lters on both sides of the front panel, behind the grilles, should occasionally be removed and cleaned to ensure maximum airow through the device.

Disconnect the unit from mains power prior to removing dust the lter, and ensure the dust lter is replace prior to turning the unit back on.

Do not use sharp or metal objects to remove the dust lter, and be careful that the implement used to remove the lter does not enter the device.

In extreme cases it may be necessary to clean the inside of the device. This procedure should only be carried out by qualied service personnel. This may be necessary if the device has had prolonged operation in an extreme environment such as one where cracked oil smoke machines are in use. If the device is used in extreme conditions, it is recommended to have it serviced every three years as a preventative measure.

9.3. Factory Default Settings

9.3.1. Module Defaults

Module Type: 4 x CL1-Way Mod Input Mute: On Mod Output Mutes: Off Gain: 0 dB (unity) Delay: 0 ms Polarity: Positive (In phase) MaxRMS: 20 dB MaxPeak: 21 dB

Amp Gain: 35 dB

ISVPL: 194 V

Input & Output EQ: Flat

PLM+ SERIES Operation Manual rev 1.0.0

9.3.2. Input and Router Defaults

Autoselect: On Input sensitivity: +26 dBu Dante: Disabled AES3: Terminated Iso-Float: Enabled

Router 1: Priority 1 = Dante Receiver (Ch.1) Priority 2 = Dante Receiver (Ch.5) Priority 3 = AES1 (Ch.1) Priority 4 = Analog 1

Router 2: Priority 1 = Dante Receiver (Ch.2) Priority 2 = Dante Receiver (Ch.6) Priority 3 = AES1 (Ch.2) Priority 4 = Analog 2

Router 3: Priority 1 = Dante Receiver (Ch.3) Priority 2 = Dante Receiver (Ch.7) Priority 3 = AES1 (Ch.3) Priority 4 = Analog 3

9. Appendix

Router 4: Priority 1 = Dante Receiver (Ch.4) Priority 2 = Dante Receiver (Ch.8) Priority 3 = AES1 (Ch.4) Priority 4 = Analog 4

9.3.3. Ampliﬁer and Device Defaults

Attenuation: 0 dB Polarity: Positive (In phase) Mutes: Unmuted Load Model: No Load Model Breaker Emulation Limiter: PLM 20K44 - 32A PLM 12K44 - 25A IP Conguration: Auto Zero Conf. (Auto IP) Dual Redundancy: Disabled Dante Slave Only: Enabled

PLM+ SERIES Operation Manual rev 1.0.0

9. Appendix

PLM 12K44

Level L oad

Rated power

per channel

Line Cu rren t

Power Factor

Meas ured Po wer (W) Thermal Dissipation

(A) (%) In Out D issipated BTU/hr kCal/hr

Main s Voltag e 100 VAC, 30 A

Standby 0 0 0 0

Power on , Idli ng 0 0 0 0

Pink Ps eudo Noise

16 Ω / Ch. 950 10.82 8 98.8 1 05 9.18 474.79 5 584.385 1994 502.817

8 Ω / Ch. 1900 19.184 5 98.9 1868.46 949.486 9 18. 974 3135.67 7 90.7 04

4 Ω / Ch. 3000 24. 607 98.8 2389.08 12 00.1 9 118 8.8 94 4056.68 1022.95

2.67 Ω / Ch. 3000 2 5.74 8 98.9 2550.96 115 1. 38 1399. 581 4775.57 12 04 .23

2 Ω / Ch. 3000 2 5.75 4 98.9 2576.04 1112. 9 6 146 3.076 49 92.22 125 8. 86

Sine 20 kHz 8 Ω / Ch. 2.40 3 97. 5 23 1.3 6 0.05 231. 355 78 9.416 199 .0 63

Main s Voltag e 120 VAC, 30 A

Standby 0 0 0 0

Power on , Idli ng 0 0 0 0

Pink Ps eudo Noise

16 Ω / Ch. 950 8.802 99 103 4.5 2 474.7 95 559 .725 1909.86 48 1.5 99

8 Ω / Ch. 1900 15 .0 67 99 17 64.9 6 949.486 8 15. 474 2 782 .51 701. 65

4 Ω / Ch. 3000 24.0 34 99.2 2 816.6 4 150 1.7 13 14.9 38 44 86.7 6 11 31.4

2.67 Ω / Ch. 3000 24.5 22 9 9.1 2893. 56 1437.43 1456.128 49 68. 51 125 2. 88

2 Ω / Ch. 3000 25.1 02 99. 2 2980.02 13 61.2 1618 .8 21 5523.65 139 2.8 7

Sine 20 kHz 8 Ω / Ch. 1.9 64 9 7.4 226.44 0.005 226.435 772.628 194. 829

Main s Voltag e 208 VAC, 17.3 A

Standby 0 0 0 0

Power on , Idli ng 0 0 0 0

Pink Ps eudo Noise

16 Ω / Ch. 950 4 .947 98.6 1 00 1.16 475.0 12 5 26.14 8 179 5. 29 4 52.70 8

8 Ω / Ch. 1900 8 .717 9 9.2 176 5.86 949.486 8 16. 374 2785.58 702.425

4 Ω / Ch. 3000 13 .26 8 99.2 2686.62 15 00 .9 4 118 5.6 80 40 45.71 102 0.18

2.67 Ω / Ch. 3000 13. 987 9 9.1 284 6.52 15 00.29 1346.231 459 3.53 1158.33

2 Ω / Ch. 3000 14.780 99.2 3046.2 1499 .9 8 1546.220 5275.92 1330 .4

Sine 20 kHz 8 Ω / Ch. 1.171 92.8 2 21.1 0.00 5 221.0 95 754.407 190.2 35

Main s Voltag e 230 VAC, 16 A

Standby 0 0 0 0

Power on , Idli ng 0 0 0 0

Pink Ps eudo Noise

16 Ω / Ch. 950 4.65 4 9 8.5 100 3.3 2 474 .79 5 528 .525 1803 .4 454.754

8 Ω / Ch. 1900 7.7 29 99 173 3.76 949.486 78 4.2 74 2676. 05 674. 80 5

4 Ω / Ch. 3000 11.4 07 9 9.1 25 62 15 00.9 4 1061.060 36 20.49 912.9 58

2.67 Ω / Ch. 3000 12.816 99.2 2873.22 149 9.37 137 3.8 52 46 87.7 8 118 2. 09

2 Ω / Ch. 3000 13 .091 9 9.1 29 93.04 1499 .9 8 1493 .060 5094.53 1284.66

Sine 20 kHz 8 Ω / Ch. 1.0 49 90.2 214. 02 0.005 2 14.0 15 73 0.25 184.143

9.4. Current Draw and Thermal Dissipation Speciﬁcations

The tables in this section provide measured current consumption and calculated heat dissipation for ve different operating conditions for each PLM+ Series device.

1. Standby Mode

2. Power On (Idle - No Signal)

3. Power On (Normal Operation - Pink Noise 1/8 of Rated Power)

4. Power On (Heavy Duty Operation - Pink Noise Max Power) - Not available for PLM 20000Q

5. Power On (Pilot Tone Operation - 20 kHz Sine Wave)

Table 9.2: PLM12K44 Current Draw and Dissipation Specications

PLM+ SERIES Operation Manual rev 1.0.0

9. Appendix

PLM 20K44

Level L oad

Rated power

per channel

Line Cu rren t

Power Factor

Meas ured Po wer (W) Thermal Dissipation

(A) (%) In Out D issipated BTU/hr kCal/hr

Main s Voltag e 100 VAC, 30 A

Standby 0.33 51.8 17 0 17 58.006 14. 627

Power on , Idli ng 2.43 9 6.8 235 0 235 80 1.8 53 20 2.199

Pink Ps eudo Noise

16 Ω / Ch. 117 5 12.126 8 98.6 119 1. 6 587.596 604.004 2060.946 519.69 7

8 Ω / Ch. 2350 22.349 98.9 2197.714 1173 .9 27 10 23.7 88 3493.309 880.888

4 Ω / Ch. 4400 29 .18 9 98 .9 285 2.76 14 77. 842 1374 .918 46 91.41 3 118 3.0 07

2.67 Ω / Ch. 5000 29.250 98.9 28 62.12 1399.309 14 62. 811 49 91. 32 1258.633

2 Ω / Ch. 29 .134 98.8 2826 .48 135 4.76 9 1471.711 5 021. 688 126 6. 29 1

Sine 20 kHz 8 Ω / Ch. 2.49 0 96.9 236.425 0.005 236.420 80 6.698 203.420

Main s Voltag e 120 VAC, 30 A

Standby 0.3 47. 5 17 0 17 58.006 14.6 27

Power on , Idli ng 2 96.7 2 27 0 227 774.5 56 19 5.315

Pink Ps eudo Noise

16 Ω / Ch. 117 5 11. 974 98.6 118 0.3 8 587.596 5 92.78 4 2022. 66 510.0 43

8 Ω / Ch. 2350 18.3 63 99 214 4 117 3. 93 970.073 3 310.03 834 .671

4 Ω / Ch. 4400 30.787 9 9.2 35 47.8 1949 .5 159 8. 295 5 453.61 137 5.21

2.67 Ω / Ch. 5000 29.548 98.9 3438.6 1751.75 1686 .85 4 5 755 .78 1451. 4

2 Ω / Ch. 4400 29.8 84 99 3495 1664.66 18 30. 337 6 245.37 15 74.8 6

Sine 20 kHz 8 Ω / Ch. 2.03 4 96.6 231. 649 0.005 23 1.6 44 790.402 19 9. 311

Main s Voltag e 208 VAC, 17.3 A

Standby 26.9 17.5 0 17. 5 5 9.713 15.057

Power on , Idli ng 92.2 222 0 222 757. 49 5 191.013

Pink Ps eudo Noise

16 Ω / Ch. 117 5 5.7 22 98.5 1151.16 587.596 56 3.564 192 2.9 6 484.902

8 Ω / Ch. 2350 10 .169 98.8 2054 .61 117 3. 93 880.6 79 3005 757.754

4 Ω / Ch. 16 .20 8 99 3285.6 1 947.7 7 1 337. 828 4563.86 1151. 0 9

2.67 Ω / Ch. 15.598 99 3171 1751.75 1419 .2 54 4842.7 1 22 1.16

2 Ω / Ch. 15 .9 89 99 3253 .2 1664.66 1588. 537 5420. 31 1366 .81

Sine 20 kHz 8 Ω / Ch. 1. 20 8 9 2.1 2 28 .611 0.005 228.6 06 78 0.035 196.6 97

Main s Voltag e 230 VAC, 16 A

Standby 23.3 18 0 18 6 1.419 15.4 88

Power on , Idli ng 1.2 91. 5 222 0 222 7 57. 49 5 191.013

Pink Ps eudo Noise

16 Ω / Ch. 117 5 5 .106 9 8.2 113 3.7 587.596 54 6.10 4 186 3.3 8 469.879

8 Ω / Ch. 2350 9.1 79 98.9 2052.85 117 3.9 3 878.924 2999.01 75 6.244

4 Ω / Ch. 15.9 15 3 528.6 2108 .58 142 0.016 4845.29 122 1.81

2.67 Ω / Ch. 16.232 99 3616 .2 1964 .63 1651. 569 5635.3 9 1421.0 4

2 Ω / Ch. 16.080 99 359 5.2 1865. 44 172 9.7 62 5 9 02 .19 14 88.3 2

Sine 20 kHz 8 Ω / Ch. 1.117 90.3 2 27.6 89 0.00 5 22 7.6 84 776 .891 195. 90 4

Table 9.3: PLM20K44 Current Draw and Dissipation Specications

PLM+ SERIES Operation Manual rev 1.0.0

9. Appendix

Term Description

Floating

An analo g balanced inpu t or output is said to b e oating when ful l electrical is olation exists b etween that inpu t or output and the e quipment conne cted to it.

Transforme r-coupled inpu ts and outputs are i nherently oat ing. Electroni cally balance d inputs and outp uts can never be trul y oating, thoug h better design s –

such as tha t found in the PLM+ - do mim ic the character istics of trans former-couple d designs to a high d egree.

Frame

Lake term inology for a physi cal unit contai ning a Lake proce ssing system, i.e. a si ngle LM 26, PLM, PLM+ or le gacy Lake Proce ssor.

Frame ID

An elect ronic identi cation ‘label’ wh ich can be given to ea ch Frame in an ampli cation system. Na ming Frames in a lar ge system is desir able as it simpli es

identi cation in the Lake C ontroller.

Frame Pr eset

Frame Pres ets are a class of Pre sets within the L ake processing s ystem. Up to 100 can be sto red in the hardwar e device, and each ho lds the complete

congur ation of all Modul es and the Module s’ internal setti ngs.

Gigabit Ethernet

Descri bes the speed of Eth ernet data tran sfer for devices t hat transmit Ethe rnet frames at a r ate of a gigabit per se cond, as dened by t he

IEEE 802.3 -2008 standar d.

Hub

A type of ne twork interfac e device with multi ple Ethernet po rts. Data arri ving at any port is s ent to all others. H ubs have been larg ely replaced by Sw itches.

In-Rush Current

When powe r is applied to a piec e of electronic e quipment, the in itial current ta ken by the PSU can be ver y high as the vario us capacitors in t he circuitry ch arge up;

this is cal led the in-rus h current. In the ca se of power amplie rs, which conta in numerous ver y large capacit ors, the in-rus h current can be en ough to blow mains

breaker s. The PLM+’s PSU contain s circuitry to co ntrol the in-rus h current to preven t this.

Input Level

The ampli tude of an audio sig nal at the point whe re it is applied to th e input of the device , or at the input of an int ermediate stag e within it. An anal og input signal

level will b e expressed in dBu ’s, while a digital in put signal level in d BfS (dBs below digi tal clip level; fS = ful l-scale)

IP Address

Every ite m of equipment con nected to an Ether net network has a un ique address ca lled the IP addre ss, so that data get s to the correct pla ce. IP addresse s are

writte n as four groups of thr ee decimal numb ers between 0 an d 255. In a system consi sting of Lake Proce ssors and a Lake C ontroller they a re assigned and

detected autom atically.

IP Subn et Mask

IP subnet m asks are require d in all IP networks . The subnet is dete rmined by the size a nd type of network b eing used. For sm all networks (le ss than 254 addres ses)

a subnet ma sk of 255.255.255.0 c an be used. (A Clas s C network).

Iso-Float

Iso-Fl oat is Lake’s propri etary method of e lectronic bal ancing, which pr ovides a partic ularly high leve l of isolation and i mmunity from gro und loops.

ISVPL

ISVPL is an ab breviation for In ter-Sample Voltag e Peak Limiter, a propr ietary Lab.gr uppen techniq ue for ensuring th at voltage at the out put terminals of a PL M+

does not exc eed a pre-dete rmined level. Eig ht ISVPL proles pro vide the ability to c ongure for low di stortion or hig h SPL specic to cer tain frequen cy ranges,

or for unive rsal use.

Lake Con troller

The Lake Co ntroller is the s oftware appli cation used to con trol LM 26 Processo rs, PLM+ Series a nd other Lake devic es. This softw are applicatio n provides

additio nal functiona lity and allows var ious grouping f unctions for sim ultaneous con trol of multiple L ake Processing e nabled devices .

Latency

The smal l but nite delay inc urred by audio sig nals when they are t ransformed int o the digital doma in, processed d igitally and the n converted bac k into analog

signal s. In the Lake system, l atency is assure d to be constant.

Legac y Lake Dev ice

This term r efers to older La ke audio equipme nt which may form par t of an audio syste m (i.e. Lake Contour Pr o 26, Lake Mesa Qua d EQ and the Dolby Lake

Proces sor). The Lake Cont roller has the ca pability to cont rol all Lake legac y products.

LimiterMax

Limiter Max is the name give n to Lake’s propriet ary package of dy namics control w hich forms par t of the Lake Proces sing system.

Line Driver

An analo g audio amplie r, usually w ith zero gain, havi ng very low output i mpedance and hi gh drive capabil ity. They are used fo r transmittin g balanced anal og audio

over very l ong cables.

Linea r Phase Crossover

See FIR Filt ers.

Load Librar y

The Lake Co ntroller inclu des LoadLibra ry, a set of Module le s specic to the PLM+ Se ries. These Mo dules include a da tabase of the ele ctrical chara cteristics of

various p opular loudsp eakers in additi on to the standard M odule data. The PL M+ uses the load dat a when verifyin g and monitoring a mplier loads.

See Finge rprint, LoadS mart and Speake rSafe.

Load, equal/unequal

The PLM+ dra ws different cur rent levels from t he AC supply, and thus ha s different powe r ratings accord ing to whether all c hannels of the amp lier are drivin g into

the same lo ad impedance, o r if there are diff erent impedan ces on differen t channels.

LoadSmart

LoadSma rt is a load veri cation procedu re within the PLM+ whi ch allows the oper ator to conrm that e ach PLM+ output has t he correct quan tity and type of

speaker c onnected to it. It i s intended to be use d pre-perfor mance prior to ru nning SpeakerS afe.

Loop -Thru

This term r efers to the Link co nnectors provi ded on the PLM+ for dai sy-chaining fu rther amplie rs or other equip ment. The use of th ese to connect fur ther devices

is terme d a loop-thru.

MAC Address

In additi on to an IP address, ev ery device on an Et hernet network h as a MAC address. T his address is xe d at the time of manufa cture, and is eff ectively the

perman ent identier of t he physical unit . MAC stands for Medi a Access Contro l

MaxPeak

Lake’s Limit erMax provide s independent d ynamics contro l over signal peaks ( MaxPeak) and th e average signal l evel (MaxRMS).

Module

The term us ed in the Lake Contr oller to describ e the virtual set o f signal proces sing that routes a n audio input to the var ious frequen cy weighted output s of a

crossove r. The processing s ystem within the dev ice allows for two Mo dules, each of whi ch may be assigne d a range of crossove r conguration s, input source s, etc.

Module Preset

A class of Pr eset within the La ke processing sy stem. A Module Pres et (Module le) co ntains all the con guration data a nd settings for o ne Module, and is s aved in

the Lake Co ntroller soft ware, not in the hard ware device.

9.5. Glossary of Terms, Acronyms and Abbreviations

The explanations given in Table 9.4 below are based on the specic use of each term in this manual. The denitions are not intended to be exhaustive and many of these terms have wider meanings.

PLM+ SERIES Operation Manual rev 1.0.0

Term Description

Ofine

A device on a n Ethernet netwo rk which is not comm unicating with th e rest of the networ k either due to a faul t or intentionall y is said to be ofin e.

Online

A device on a n Ethernet netwo rk which is fully op erational and c ommunicating w ith the rest of the net work is said to be on line.

PAL

An abbrev iation for Power Aver age Limiter, PAL is prop rietary Lab.g ruppen circuit w hich provides ad ditional ampli er protection . The PAL ensures tha t the power

drawn by the P SU from the AC mains do es not exceed the mai ns breaker ratin gs.

Parallel

Two or more e.g. inp uts which are wire d together so that a ll inputs are conn ected to the same so urce are said to be p aralleled. Si gnal levels will be re duced if too

many inpu ts are parallel ed; in the case of AES3 , this may result in a co mplete loss of aud io.

Parameter

Any contr ol function whic h can be adjusted by th e user to one of severa l different val ues is termed a par ameter. For example, i nput level, gain, de lay, and limiter

thresho ld are all parame ters.

Pass-Through Cable

See Stra ight network cab le.

PFC

Power Factor C orrection. PFC r educes curren t peaks on the lines a nd reduces the re quirements pl aced on the mains di stribution sys tem.

Ping

Ping is a ter m coined by the IT indu stry to the proce dure of sending a c ommand over a netwo rk to a particula r Ethernet devic e asking it to conr m its identity an d

possib ly reply with addi tional informat ion. Thus an Lake d evice on the networ k can be pinged fro m the Lake Control ler; on receipt of t he ‘ping’, the hi-inten sity

white LED on t he front panel ill uminates. Rever se pinging is als o possible, wher eby the ping is inst igated from Lake h ardware device an d a visual identi cation of

the proce ssor register s in the Lake Contr oller softwar e.

Preset

A complet e frame congura tion that is store d in the device hard ware.

Prima ry Etherne t Port

The Prima ry Ethernet po rt on the is the mea ns of connecting t he device to a networ k. See also Secon dary Etherne t Port.

PSU

Abbrevi ation of Power Suppl y Unit. The PSU in any ite m of electronic e quipment conve rts the AC mains into a s et of internal DC vol tages which run t he electronic

assemblies themselves.

RJ45

RJ45 conn ections are the in dustry-sta ndard connecto rs for Ethernet p orts.

Router

As far as ne tworks of the type d iscussed in thi s manual are conc erned, see Switc h.

Secon dary Ether net Port

The Seco ndary Ethern et port can be use d either as a daisy- chain output, r epeating the net work connecti on at the Primary p ort, or for the con nection of a sepa rate

second n etwork for full re dundancy.

Shor t Circuit Protecti on

A Lab.gru ppen propriet ary protective c ircuit design ed to mute a channel wh en a short circu it is detected at its o utput terminal s to prevent damage to t he device.

SpeakerSafe

Once act ivated, SpeakerS afe constantly m onitors the volt age and current at t he PLM+’s outputs. Using F ingerprint da ta, the softwar e then calculate s parameters

such as voi ce coil and magnet t emperatures, p roviding the ope rator with real-t ime performa nce monitoring. S ee LoadLibrar y.

speakON

An indust rial-qualit y loudspeaker co nnector manufac tured by Neutrik. 4 -pole (2 speakers) a nd 8-pole (4 speaker s) versions are tt ed to various versio ns of the PLM+.

Star Topo logy

A network t opology which us es a network switc h to connect to indiv idual Lake devic es. Each device co nnects to one por t on the switch with it s own cable, thus the

network l ooks like a star whe n drawn as a diagram w ith the switch at the ce ntre.

Stra ight Ne twork Cable

A Cat-5/6 net work cable with fu ll pin-to-pin co nnections is ca lled a straight n etwork cable. L ake devices can con nect to a network u sing either stra ight or crossed

network c ables.

Subsystem

It is poss ible when workin g with large netwo rked systems to stor e selected comp onents of the system i nto a Subsystem. Th is is useful if work ing on a tour that

encomp asses both larg e and mid-sized ve nues. The same co re Lake Controll er data can then be u sed for a reduced n umber of Lake devic es.

Super Module

A Super Mo dule is a virtual c onstruct that c an be realized with in the Lake Contro ller, allowing a set of Mo dules in differ ent Frames to be tre ated as a single Modu le.

Switch (Ethernet)

An Ethern et switch allows seve ral Ethernet dev ices to be connec ted to a network usin g a star topology. Mo re intelligent th an the earlier hub s which they now lar gely

replace , they route packets o f data only to the unit s for which they are in tended, and also p erform other sy stem housekeep ing and control fu nctions.

Syste m Preset

A class of Pr eset within the La ke Processing sy stem, System Pres ets allow Module or Fr ame congurat ions and settin gs to be stored for the e ntire network of

LM 26 Proce ssors, PLM Seri es, PLM+ Series an d other legacy La ke devices.

Tablet PC

A compact P C which uses a touch screen instea d of keyboard and mou se. The Lake Contr oller has been op timized for use on Table t PCs.

Termination

AES3 digi tal audio interc onnections mu st be correctly te rminated for rel iable operatio n. The 110 ohm termination s must be set ‘on’ at the be ginning and end o f a

set of dais y-chained digi tal audio equipm ent, and ‘off’ at a ny intermediate o nes.

Topology

A mathema tical word for “ar rangement” or “ conguration”. The t opology of a netwo rk is a means of visua lizing the overal l conguration o f the network.

Unive rsal Power Sup ply

A power supp ly that operates i n all countries , without the need f or manual adjust ment, as long as th e voltage falls wit hin the specied r ange for the devic e.

VHF Pro tecti on

VHF prote ction is another a mplier safet y circuit develop ed by Lab.gruppe n. The presence of c ontinuous HF aud io can easily dam age loudspeake rs, so the

protect ion circuit moni tors the output thi s, muting the power o utput channel i f necessary

V peak

Indicate s the peak voltage o f an audio signal. F or a sinusoidal si gnal, the peak vol tage = 1.414 x the RMS vol tage, Vrms. Not to be co nfused with pea k-to-peak

voltage (w ritten V pk-pk), whi ch = V peak x 2.

Vrms

The RMS vol tage of a signal. Se e RMS.

Wirel ess Access Point

A device us ed to connect a com puter to an Etherne t network withou t cables; a radio tr ansmitter/rec eiver for data.

Wireless Network

An Ethern et network wher e some or all cable d connections a re replaced by wir eless links.

9. Appendix

Table 9.4: Glossary of Terms, Acronyms and Abbreviations

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10. Application Guide

This chapter describes the practical application and use of PLM+ Series devices.

10.1. Rack I/O Panels

For fast and simple system connection, pre-wired racks using connection panels can be used. With an I/O connector panel tted to the front of the rack, all audio, loudspeaker, network and power cables can be plugged in at one position, without requiring rear panel access.

10.2. Power Distribution

For professional applications it is recommended that the sum of the available mains power is above 3000 W per PLM+ (e.g. 230 V x 16 A, 120 V x 32 A). As PLM+ devices are equipped with BEL, the current draw of the device can be congured to perfectly match the power distribution.

Safety approved equipment is not required to have a mains breaker, as long as this does not pose any re hazard under fault conditions, as is the case with the PLM+. Please see the following examples suggesting power distribution methods across multiple PLM+ devices. All of the examples given will work, although the rst examples for both 230 V and 115 V operation have a slight advantage due to their “power sharing” ability.

10.2.1. Six PLM+ Series Devices with 230-240 V Mains Supply

If the mains supply is 230 V and the system requirement is six PLM+s, then the mains capacity would need to be able to provide 3 x 32 A. There are two methods of achieving this:

1. Three racks, each with two PLM+s and a 32 A single-phase mains supply. The 32 A capacity is shared between the two PLM+s within the rack. This is benecial as the two PLM+s don’t have to draw the same current. The only limitation is that in combination they don’t draw over 32 A.

2. Three racks, each with two PLM+s and a 16 A three-phase mains supply. This requires central power distribution to be congured as two 3 x 16 A circuits from 3 x 32 A. One phase is used for each PLM+ within the rack. This has the benet that each PLM+ has its own breaker, but they all have to operate within the same limit of 16 A; therefore, more care must be taken to ensure that no breaker blows if different loads are used. Note: The 230 V version of the PLM+ is equipped with a slow-blow 30 A ceramic breaker.

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10. Application Guide

10.2.2. Six PLM+ Series Devices with 100-120 V Mains Supply

If the mains supply is 115 V and the system requirement is 6 PLM+s, then the mains capacity would need to be able to supply two 3 x 30 A circuits. There are two methods of achieving this:

1. Two racks, each with three 230 V version PLM+s and a 30 A three-phase mains supply. In the rack the PLM+s are connected between the phases, i.e. one between phase 1 and 2, one between phase 2 and 3 and the last between phase 3 and 1. Each 30 A mains breaker is shared between two PLM+s and the mains current is to some extent canceled. This has the benet that the three PLM+s don’t have to draw the same current; one can be allowed to draw a little more than the other two. The only limitation is that in combination they don’t draw over 30 A.

2. Two racks, each with three 115 V version PLM+s and a 30 A three-phase mains supply. One phase is used for each PLM+ within the rack. This has the benet that each PLM+ has its own breaker, but they all have to operate within the same limit of 30 A; therefore, more care must be taken to ensure that no breaker blows if different loads are used.

10.3. Gain Structure

The PLM+ Series architecture provides gain adjustments at various points in the signal path and therefore enabling various places for muting and level adjustment. Each mute or gain adjustment point serves a different purpose. The signal ow diagrams in chapter 6 provide a useful reference for the signal path. The following sections describe the various adjustment points, all of which are available via the Lake Controller software.

10.3.1. Input Headroom (Analog Inputs Only)

Input Headroom should be set to 12 dBu if the source can be limited to 12 dBu; otherwise it should be set to 26 dBu. This setting does not affect the other gain stages, or the overall noise oor; it allows control of the appropriate headroom at the input stage only.

To adjust, navigate to I/O CONFIG > INPUT CONFIGURATION in the Lake Controller. Please refer to the Lake Controller Operation Manual for further details.

10.3.2. Input Mixer

Input Mixer gains can remain at 0.00 dB for most congurations; if only one input channel is used per Module, the other can be set to -INF.

To adjust, navigate to I/O CONFIG and tap the Input Mixer blocks for the Module in the Lake Controller. Please refer to the Lake Controller Operation Manual for further details.

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10. Application Guide

10.3.3. Module Input Gain

Input Gain is used to adjust the level between different speaker cabinets in the system. This gain can remain at

0.00 dB unless a lower level is required for the cabinet/s driven by this Module.

To adjust, navigate to MODULES > EQ/LEVELS > LEVELS in the Lake Controller. Please refer to the Lake Controller Operation Manual for further details.

10.3.4. Module Output Gain

Factory and User Gain are provided for each Module output. These two stages provide a level of security and control for the system designer (Factory) and a further level of adjustment for the user (User), both of which combine to balance the level between frequency bands in a multi-way crossover (Contour conguration) or the Module output level (Mesa conguration).

1. Factory Gain is set by the system designer and can be hidden within the Module le. The Factory Gain parameter is only accessible when the Module is unlocked and the Lake Controller is in Designer Mode. Adjust via MODULES > LEVELS > METER OPTIONS > ADJUST FACTORY.

2. User Gain is editable by a user unless the system designer has locked away the parameter; adjust via MODULES > LEVELS.

Generally, output gain values are congured within a Module / loudspeaker preset le and should not need to be adjusted further.

10.3.5. Attenuator

An attenuator gain adjustment is provided for each power output channel in the PLM+. This control replaces the traditional volume control found on conventional ampliers and should typically be left at 0 dB during use.

To adjust, navigate to I/O CONFIG > EVENTS & CONTROL > STATUS in the Lake Controller. Please refer to the Lake Controller Operation Manual for further details.

10.3.6. Amp Gain

The Amp Gain corresponds to the gain adjustment in a conventional separate loudspeaker processor and amplier system. When using a pre-dened Module loudspeaker preset le, the Amp Gain settings will normally remain as dened in the le. The limiter and output gain settings of the Module were congured with this gain setting and will not be automatically compensated if changes are made. This conguration scheme, though unusual, allows for compatibility with other Lake products, assuming the amplier gain is set as specied in the speaker preset.

When creating a loudspeaker preset Module le, adjust by navigating to I/O CONFIG > EVENTS & CONTROL > CONTROL in the Lake Controller. Please refer to the Lake Controller Operation Manual for further details.

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10. Application Guide

10.4. Gain / Level Optimization

10.4.1. Maximize Volume Capability

To maximize the volume capability of the device, ensure there is sufcient headroom in the signal path to avoid clipping before the limiters engage. It must be possible to achieve enough gain through the device to engage the limiters and realize a high average SPL. As an optimal setting, allow for a headroom of 10 dB or more for all channels; the simplest way to accomplish this is to increase the Module input gain.

10.4.2. Minimize Noise

To help provide the best volume to noise ratio, use an AES or Dante digital input signal wherever possible. If using analog inputs, ensure that unused or unnecessarily high headroom is not introduced at the input to the device. If full or high average power is not required, the Module input gain may be reduced.

10.4.3. Gain Optimization Examples

This section provides examples on performance effects resulting from changes to the PLM+ gain structure

10.4.3.1. Digital Input Gain Structure Examples

Figure 10.2 illustrates the recommended conguration of the PLM+ when using an AES or Dante digital input.

• Input Clip: 0 dBFS

• Amp Gain: 35 dB

• SNR: 114.2 dB

• Absolute Noise Floor: -71.3 dBu

100,0

50,0

0,0

-50,0

-100,0

dB/dBu

-150,0 Analog AES Input Input Mixer Module In Module Out A mp Attenuation Analog Ref Amp Gain ISVPL Output

-200,0

-250,0

Table 10.2: Digital Input: Low Noise with Good Headroom (High Input / High SPL)

Clip

Nominal

Noise

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10. Application Guide

Figure 10.3 illustrates how to achieve the lowest possible output noise, although this is not a recommended conguration.

• Input Clip: 0 dBFS

• Amp Gain: 22 dB

• SNR: 114.8 dB

• Absolute Noise Floor: -71.9 dBu

100,0

50,0

0,0

-50,0

-100,0

dB/dBu

-150,0 Analog AES Input Input Mixer Module In Module Out Amp Attenuation Analog Ref Amp Gain ISVPL Output

-200,0

-250,0

Table 10.3: Digital Input Optimized for Minimum Noise - Not Recommended

Clip

Nominal

Noise

The improvement in noise performance (at the cost of losing headroom and compression features) is only 0.6 dB; it is therefore not recommended to optimize performance in this manner.

10.4.3.2. Analog Input Gain Structure Examples

Figure 10.4 illustrates how to minimize absolute noise while limiting the available SPL. Input Clip: 12 dBu

• Amp Gain: 22 dB

• SNR: 105.5 dB

• Absolute Noise Floor: -71.5 dBu

• SPL is limited to -8.9 dB relative to clip in this minimum absolute noise level example

60,0

40,0

20,0

0,0

-20,0

-40,0

dB/dBu

-60,0

-80,0

-100,0

-120,0

-140,0 Analog AES Input Input Mixer Module In Module Out Amp Attenuation Analog Ref Amp Gain ISVPL Output

Clip

Nominal

Noise

Table 10.4: Analog: Low Noise with Limited Output (Low Input / Low SPL)

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10. Application Guide

Figure 10.5 illustrates how to minimize absolute noise while achieving full power. In this illustration it can be seen that there is no available headroom.

• Input Clip: 12 dBu

• Amp Gain: 30.9 dB

• SNR: 111.3 dB

• Absolute Noise Floor: -68.4 dBu

80,0

60,0

40,0

20,0

0,0

-20,0

-40,0

dB/dBu

-60,0

-80,0

-100,0

-120,0

-140,0 Analog AES Input Input Mixer Module In Module Out A mp Attenuation Analog Ref A mp Gain ISVPL Output

Table 10.5: Analog: Low Noise with Full Output Power (Low Input / High SPL)

Clip

Nominal

Noise

Figure 10.6 illustrates how moderate noise with extreme SPL can be achieved. SPL is extremely high in this example as maximum headroom is available at the input and within the processing stage. This makes it possible to increase the average SPL by utilizing internal compression capabilities.

• Input Clip: 0 dBFS

• Amp Gain: 35 dB

• SNR: 114.2 dB

• Absolute Noise Floor: -71.3 dBu

60.0

40.0

20.0

0.0

-20.0

-40.0

dB/dBu

-60.0

-80.0

-100.0

-120.0

-140.0

Analog A ES Input Input Mixer Module In Module Out Amp Attenuation Analog Ref Amp Gain ISVPL Output

Clip

Nominal

Noise

Table 10.6: Analog Input: Moderate Noise with Very High Output (Very High SPL)

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10. Application Guide

10.5. Speaker Conﬁgurations

Connecting two speakers in parallel to a PLM+ power output presents a load to the amplier which is half the impedance of that presented by one speaker. Therefore, the current that two speakers will attempt to draw from the output stage is double that for one speaker, and this higher current may be sufcient to cause the Current Peak Limiter to become active. The more speakers connected to an output in parallel, the lower the impedance and the higher the current draw.

Multiple loudspeakers may be driven by a PLM+ power output more satisfactorily if a series-parallel wiring conguration is adopted. Please ensure care is taken to match polarity correctly.

When using series-parallel wiring, the nominal impedance is the same as with one speaker; however, the principle of power sharing still applies, and it is not possible to get the amplier section to deliver more than its rated power.

Note: Nominal loads as low as 2 ohms are supported by the PLM+. However, a 2 ohm nominal load has impedance dips at its resonances below 2 ohms; in such cases it is likely that the resulting higher current will cause CPL to activate.

10.6. Digital Audio Connections

Whenever possible, it is preferable to connect a digital rather that analog input signal to the device. This is particularly relevant if the source signal is already in the digital domain, such as the source from a digital mixing console or digital distribution system. The primary cause of signal distortion and signal delay (latency) is the digitalto-analog and analog-to-digital conversion process. Therefore, using digital inputs normally provides higher quality audio with lower latency.

Two types of digital audio inputs are available: Dante networked multi-channel digital audio, and 2-channel digital audio via the AES3. Dante-based system congurations and interconnections are explained in a separate document, the Lake Network Conguration Guide.

The information in this section is supplied for users unfamiliar with AES3. Users already familiar with AES3 will nd that the device conforms to established conventions.

10.6.1. AES3 Digital Audio

The original AES/EBU digital audio interface standard was developed by the Audio Engineering Society in conjunction with the European Broadcast Union. Originally published in 1985, it was revised in 1992 and 2003, and in its current iteration it is properly designated the AES3 standard.

AES3 is a serial transmission format for linearly represented (uncompressed) digital audio data. It describes a method for carrying two channels of periodically sampled and uniformly quantized audio signals on a single twisted-pair cable.

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10. Application Guide

The data format allows for auxiliary data which can be used for information on signal characteristics as well as the sampled audio data. The physical interconnection, as dened by IEC 60958 Type I, species three-conductor 110-ohm twisted pair cabling terminated by an XLR connector. Please refer to section 8.3 for wiring details. AES3 provides for multiple sampling rates and resolutions of up to 24 bits; this device accepts sample rates from

44.1 to 192 kHz.

10.6.2. System Latency and Delay Compensation

All types of digital audio processing inherently involves a small processing delay referred to as latency. If the processing chain does not involve analog-to-digital or digital-to-analog conversion, the amount of latency is usually very small and often may be disregarded.

However, in complex systems involving multiple digital audio components and connections, enough delay may be generated to cause audio phasing problems. Therefore, the lowest latency is always preferred, and it is always important to consider system latency delays when calculating and adjusting overall delay for time-aligning multiple loudspeaker systems.

10.6.3. Connections and Cabling

10.6.3.1. AES Input Connectors

Two AES-3 input signals (each carrying two audio channels) are connected to the XLR3F connectors labelled INPUT 1-2 and INPUT 3-4 in the AES/EBU (AES-3) input section on the rear panel. Note that the Input connector types are identical for the analog and digital inputs, so care must be taken when connecting audio, particularly when analog inputs are used as a backup signal source. Connectors should be clearly labeled to prevent any confusion.

Note: Never connect a digital signal source to an analog input or an analog signal source to a digital input.

10.6.3.2. Interconnection of Multiple Units

The AES implementation in PLM+ is designed to be able to daisy-chain AES signals using passive Y-Split cables. The PLM+ device at the end of a distribution line should be set to TERMINATED; all other PLM+ devices should be set to UNTERMINATED. If an AES3 distribution amplier (DA) is being used to distribute the digital audio signals, with one DA output per processor, then all terminations should be on. However, if the AES3 is daisy-chained, only terminate the last processor in the chain.

Please refer to section 10.6.4 for further information.

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10. Application Guide

10.6.3.3. Cable Types and Distance Limitations

All digital connections should be made with 100 ohm balanced cables wired according to the AES3 standard (see Section 8.2.2). Although standard analog microphone cabling may function in limited circumstances, the potential for problems is greatly increased. AES3 contains a high-speed data stream, and requires an effective bandwidth of up to 12 MHz, far beyond the 20 kHz required for analog audio.

The distance allowed between a signal source and the PLM+ is dependent on both cable quality and the sampling rate used. At a 96 kHz sampling rate, any good quality AES3 cable should allow a cable run of 100 meters with no data losses beyond the capability of internal error correction. The best cables may allow longer cable runs, though careful trials are recommended before use in the eld. Sampling rate also governs allowed cable length; a 100 meter length at 96 kHz might extend to 200 meters at 48 kHz, but be cut to 50 meters at 192 kHz.

10.6.3.4. Signal Degradation and Loss

A weak or degraded AES3 signal will exhibit no audible loss of quality as long as the robustness of the data stream remains above the threshold required for internal error correction. As degradation approaches the threshold, audible artifacts may be heard, including pops, clicks and momentary dropouts. Any such indications require immediate attention, as often the window of acceptable data loss between artifacts and complete audio loss can be very narrow.

As a precautionary measure four touring applications, it is advisable to congure all digital audio wiring prior to use. It is recommended that all cables be tested for error-free performance at lengths 20% to 25% greater than lengths to be used in the eld in order to provide a comfortable margin of safety.

10.6.4. External Signal Distribution Hardware

10.6.4.1. Distribution Ampliﬁers

Dedicated distribution ampliers for AES3 signals are available from several manufacturers. The most common format is one input and six outputs. Digital distribution ampliers are designed to refresh or reconstruct the signal as well making up for line losses.

One type of distribution amplier is a simple repeater, which restores the waveform shape and brings the signal amplitude back up the required level. Some distribution ampliers also offer a re-clocking feature, which also retimes the signal to prevent signal degradation from clocking errors known as jitter.

Distribution ampliers that offer re-clocking often make the feature optional as using re-clocking can introduce small additional amounts of latency, so should not be used unless necessary.

10.6.4.2. Passive splitters

One single AES3 input may be split into more signals using a simple passive splitter. Splitters provide a convenient and low cost solution when only a few additional signals are required, and in situations where cable lengths are short. Attenuation is minimal, but there is no refreshing of the signal.

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10. Application Guide

10.6.5. Additional Reference Material

Complete technical information on the AES/EBU (AES3) standard can be downloaded from the AES web site at http://www.aes.org/publications/standards/.

10.7. Digital Clock Conﬁguration

10.7.1. Digital Clock Overview

In order to provide a exible and robust audio processing system, the device is equipped with a congurable digital clocking system. The digital clock can generate various independent internal sample rates, or can sync to an incoming AES3 signal. Figure 10.7 shows the various sample rates and options available.

INPUTS

AES1

AES2

DANTE

AES1

AES2

INTERNAL

48 kHz

PRIMARY

CLOCK

INTERNAL

48 kHz

AUTO /

MANUAL 48

SAMPLE RATE

CONVERTER

CLOCK

AUTO /

MANUAL 44

INTERNAL

44.1 kHz

48 kHz

96 kHz

192 kHz

48 kHz

96 kHz

192 kHz

44.1 kHz

88.2 kHz

176.4 kHz

OUTPUTS

Pwr 1

Pwr 2

Pwr 3

Pwr 4

Dante

Channel 1-8

48 / 96 kHz

Table 10.7: Digital Clocking System

In Figure 10.7, each circled C represents a choice point. A choice point is a user-interface control that can be congured using the Lake Controller software. Please refer to the Lake Controller Operation Manual for further information.

Note: Figure 10.7 indicates internally generated clocks with base-rate multiples of 44.1 kHz or 48 kHz. This should not be confused with the internal DSP sample rate of 96 kHz.

The PLM+ digital clocking system can either generate its own internal clock, or synchronize to an incoming external clock source via the AES3 digital input.

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10. Application Guide

10.7.2. Clock Source Priorities

There are two options for clock source conguration: Manual Conguration or Automatic Detection.

For Manual Conguration, the selected internal or external clock source remains xed regardless of whether a compatible clock signal is preset.

For Automatic Detection, the most appropriate clock matching the selected base-rate is automatically selected according to the following priorities.

1. AES1 (Input 1+2)

2. Internal Clock

When using automatic detection, the AES3 digital input is monitored and will switch the clock source back and forth depending on the availability of an AES3 signal. Please refer to the Lake Controller Operation Manual for additional information.

10.7.3. Dante Clock Conﬁguration

Dante uses its own digital clocking technology across the Ethernet network to ensure that all Dante devices are synchronized. As part of this logic, an order of priority is dened to identify which device becomes the Dante Master. A Dante-capable device set as Preferred Clock Master is chosen as the highest priority, followed by a device with a valid AES3 signal, then an internally generated clock.

Dante only operates at 48 kHz or 96 kHz, with the PLM+ digital clock on all Dante Slaves being overridden by the Dante Clock.

The front panel Input View indicates if that device is selected as Dante Clock Master. Conrmation of Dante Master / Slave status is also displayed in the Lake Controller. The Dante Preferred Master setting can be set from the Lake Controller I/O Conguration screen, or via the Dante Controller. For further information on Digital Clock conguration and the Lake Controller user interface, please refer to the Lake Controller Operation Manual.

PLM+ SERIES Operation Manual rev 1.0.0

11. Technical Speciﬁcations

General

Processing / Net work Lake / Da nte Lake / Dante Numbers of amplier channels 4 4 Total burst power all channel s (share among cha nnels w ith RPM) 12000 W 20000 W

Max. O utpu t Power (a ll ch.’s driven)

2 ohms 3000 W 4400 W

2.67 ohms 3000 W 5000 W 4 ohms 3000 W 4400 W 8 ohms 1900 W 2300 W 16 ohms 950 W 1150 W Hi-Z 70 V 3000 W 3300 W Hi-Z 100 V 3000 W 4700 W

Max output power single channel

2 ohms 4400 W 4400 W

2.67 ohms 5900 W 5900 W 4 ohms 4600 W 4600 W 8 ohms 2300 W 2300 W 16 ohms 1150 W 1150 W Hi-Z 70 V 3300 W 3300 W Hi-Z 100 V 4700 W 4700 W

Amplier output modul es (all models, all channels)

Peak output voltage 194 V 194 V Max output current 67 A 67 A Rational Power Management (RPM) Any channel has potential to deliver the max singl e

Default voltage limitation (can be lifted with RPM congu ration) 175 V 194 V Protection features Current Average Limiter (CAL), Very Hi gh Freq uency

Audio Perfo rman ce (Ampli er pla tform with digital input)

THD + N 20 Hz - 20 kHz for 1 W < 0.05 % < 0.05 % THD + N at 1 kHz and 1 dB below clipping < 0.04 % < 0.04 % Dynamic range > 114 dB > 114 dB Channel separation (Crosstalk) at 1 kHz > 70 dB > 70 dB Frequency response (1 W into 8 oh m, 20 Hz - 20 kHz) +/- 0.05 dB +/- 0.05 dB Interna l sampl e rate / Data p ath 96 kHz / 32 bit oating poi nt 96 kHz / 32 bit oating point Product propagation delay AES 96 kHz / analog input 1.61 / 1.68 ms 1.61 / 1.68 ms

Lake pr ocessing

Loudspeaker processing Up to 4 modules of Classic/li near-phase/FIR cro ss

System tuning

Input redundancy / Matrix Automati c 4 level in put redundancy / 4 input mixers Automatic 4 level input redundancy / 4 input mi xers System integrati on

Measu reme nt & Ana lysi s

Pilot tone generation and analys is Yes Yes Load impedance analysis Yes Yes Real Time Analyzer (RTA), 3rd party integration Yes Yes

Dante A udio Network

Dante I/O 8 x 8 8 x 8 Networ k topolo gy / redundancy Sample rates / transpor t 48, 96 kHz / Uni + Multicast 48, 96 kHz / Uni + Multicast Networ k latency 0.25, 0.5, 1.0, 2.0, 5.0 ms 0.25, 0.5, 1.0, 2.0, 5.0 ms

Devic e Presets

Local me mory l ocations for the settings of the pro duct 100 100

AES Inputs

Inputs 4 AES inputs 4 AES inputs Suppor ted sample rates / resolution 44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bits 44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bits Sample rate conversion THD + N 20 Hz - 20 kHz unweighte d 0.00003 % 0.00003 %

Analog Inputs

Inputs 4 high quality inputs with Iso-Float™ ground isolation 4 h igh qua lity inputs with Iso-Float™ ground isolation Maximum input / digital refere nce + 26 dB u / + 21 dBu + 26 dBu / + 21 dBu Sampli ng rate / res olution 96 kHz / 24 bit 96 kHz / 24 bit Input impedance balanced / unbalanced 20 k / 10 k ohm 20 k / 10 k ohm THD + N (typical at 1 k Hz unweighted) 0.0 0022 % 0.00022 % THD + N (typical at 20 Hz and 20 kHz u nweighted) 0.00033 % 0.00033 %

Limiters

Adjustable Inte r-Sample Voltage Peak Limiter (ISVPL) 17.8 - 194 V, step size 0.1 V 17.8 - 194 V, step size 0.1 V Current Peak Lim iter < 300 ms 67 A peak 67 A peak Current Average Limiter (CAL) > 300 ms 33 Arm 33 Arm LimiterMax (rms and peak limiters) MaxRMS (rms voltage lim iter) MaxPeak (pea k voltag e limite r)

PLM 12K44 PLM 20K44

channel output power

Pr ot ectio n (VH F), Dir ect Cur ren t Prot ect ion (DC ), Sho rt Circuit Protection, Current-Clip Limiter, Voltage Clip Limiter, Temperature protection

ov er, EQ, de la y, Lim iterM ax™ - pe ak an d RMS lim ite rs Group control with Raise d Cosine™ MESA EG™ asymmetric lters

Compre hensive 3rd party protocol over UDP Ethernet

Flexible topology / Supports Dual redundant networks

Yes Yes

Any chan nel has p otential to deliver the ma x single channel output power

Current Average Limiter (CAL), Very Hi gh Frequency Protection (VHF), Direct Curre nt Protection (DC), Short Circuit Protection, Current-Clip Limiter, Voltage Clip Limiter, Temperature protection

Up to 4 modul es of Classic/linear-phase/FIR crossover, EQ, delay, Lim iterMa x™ - peak and RMS limiters Group co ntrol with Raise d Cosine™ MESA EG™ asymmetric lters

Compre hensi ve 3rd par ty protocol over UDP Ethern et

Flexible topology / Supports D ual redundant n etworks

Yes Yes

PLM+ SERIES Operation Manual rev 1.0.0

11. Technical Speciﬁcations

Gain

Amplier gain 22 - 44 dB, step size 0.1 dB 22 - 44 dB, step size 0.1 dB Analog attenuator - Inf to 0 dB, step size 0.25 dB - Inf to 0 dB, step size 0.25 dB

Rear-panel interface

Analog inputs 4 x 3 pin XLR, el ectronically balanced 4 x 3 pin XLR, electronically balanced AES inputs 2 x 3 pin XLR 2 x 3 pin XLR Output connectors Auto 100/1000, Auto Uplink 2 x RJ45 etherCON 2 x RJ45 etherCON Control and monitoring interface

Detachable mains cord Neutrik powe rCON 32 A Neutrik powerCON 32 A Cooling Three fans front-to-rear airow, temperature controlled speed Three fans front-to-re ar airow, temperature contro lled speed

Front-panel interface

Display 2.5 inch, Black / white, daylight readable LCD 2.5 inch, Black / white, daylight readable LCD Fault / Warning / Limit / Clip indicators RGD LED’s and detailed fault description on display RGD LED’s and detail ed fault description on display Mute and soft function buttons 8 provide d 8 provided Standby Power but ton On / Standby On / Standby Mute Enable button Enables muting of outputs and inputs via soft-button key pad Enables muting of outputs and inputs via soft-button keypad Meter button Toggles through meter views Toggles through meter views Menu button Provides a menu driven interface for full function front panel

Rotary Encoder Yes Yes Exit button Provides a “back” function Provides a “back” function

Mains power

Nominal voltage 100 - 240 V AC 45- 66 Hz 100 - 240 V AC 45- 66 Hz Operating voltage 70 - 265 V AC 70 - 265 V AC Mains wall plug NEMA L5 -30 “Twist lock” 125 V / 30 A, and CEE 7/7

Power su pply featu res

Soft start / Inrush power Yes / Ma x 8 Ampere Yes / Max 8 Ampere Power Factor Correction (PFC) 0.98 0.98 Regulated switc h mode power supply Ye s Yes Breaker Emulation Limiter (BEL) Congurable current threshold and breaker prole Congurable current threshold and breaker prole BEL max current threshold 25 A 32 A Power Average Limi ter (PAL) Yes Yes Under Voltage Limiter (UVL) Ye s Yes Mains under voltage and overvoltage protection

and mains glitch tolerance

Dimensions

Rack rail to rear panel W: 483 mm (19”), H: 88 mm (2 U), D: 424 mm (16.7”) W: 483 mm (19”), H: 88 mm (2 U), D: 424 mm (16.7”) Overall depth including handles and rear support D: 498 mm (19.6”) D: 498 mm (19.6”)

Weight Finish

PLM 12K44 PLM 20K4 4

Ne utr ik spea kON (1 x NLT 8, 2 x NLT4) or 4 bin din g pos ts (p ai rs)

Via Ethernet for Lake Controller software, or DLM (the 3rd part y protocol)

control

“Schuko” 230 V / 16 A

Yes Yes

16.5 kg (36 lbs) 17 kg (37 lbs) Black painted steel chassis with black painted steel / aluminium

front

Ne utr ik spea kON (1 x NLT 8, 2 x NLT4) or 4 bin din g pos ts (p ai rs)

Via Ethernet for Lake Controller software, or DLM (the 3rd part y protocol)

Provides a menu driven interface for full function front panel control

NEMA L5-30 “Twist lock” 125 V / 30 A, and CEE 7/7 “Schuko” 230 V / 16 A

Bl ack pai nte d st eel chas sis wit h bla ck pain ted ste el / al um ini um front

Approvals

Note 1): Lab.grupp en burst power (1 kHz, 25 ms burst power @ 150 BPM, 12 dB Crest factor)

All specifications are subject to change without notice.

Intercooler, Class TD and Lake are national and/or international registered trademarks of Lab.gruppen AB. PLM, Powered Loudspeaker Management, R.SMPS, LoadLibrary, LoadSmart, SpeakerSafe, BEL, UVL and ISVPL are trademarks of Lab.gruppen AB. Dolby and the double-D symbol are registered trademarks of Dolby Laboratories. Contour, Mesa Quad EQ, Mesa Parametric EQ, Raised Cosine Equalization, LimiterMax and Iso-Float are trademarks of Dolby Laboratories. Audinate is a registered trademark of Audinate Pty Ltd. Dante and Zen are trademarks of Audinate Pty Ltd. All other trademarks remain the property of their respective owners.

PLM+ SERIES Operation Manual rev 1.0.0

CE, ANSI / UL 60065 (ETL), CSA C22.2 NO. 60065, FCC, PSE, RCM, BIS India

12. Warranty and Support

12.1. General

This product is manufactured by Lab.gruppen, and it is warranted to be free from any defects caused by components or factory workmanship, under normal use and service, for a period of six (6) years from date of purchase from an authorized Lab.gruppen dealer.

If the product fails to perform as specied during the warranty period, Lab.gruppen will undertake to repair, or at its option, replace this product at no charge to its owner, provided the unit is returned undamaged, shipping prepaid, to an authorized service facility or to the factory.

This warranty shall be null and void if the product is subjected to: repair work or alteration by a person other than those authorized by us; mechanical damage including shipping accidents; war, civil insurrection, misuse, abuse, operation with incorrect AC voltage; incorrect connections or accessories; operation with faulty associated equipment; or exposure to inclement weather conditions. Damage due to normal wear and tear is not covered by the warranty. Units on which the serial number has been removed or defaced will not be eligible for warranty service.

Lab.gruppen shall not be responsible for any incidental or consequential damages. Lab.gruppen’s responsibility is limited to the product itself. Lab.gruppen takes no responsibility for any loss due to cancellation of any events, or rent of replacement equipment or costs due to a third party’s or customer’s loss of prot, or any other indirect cost or losses however incurred.

Lab.gruppen reserves the right to make changes or improvements in design or manufacturing without assuming any obligation to change or improve products previously manufactured.

This warranty is exclusive, and no other warranty is expressed or implied. This warranty does not affect the customer’s statutory rights.

12.2. International Warranties

Please contact your supplier or distributor for this information, as rights and disclaimers may vary from country to country.

12.3. Technical Assistance and Service

12.3.1. International Service

If your Lab.gruppen product requires repair, contact your Lab.gruppen dealer or distributor, visit http://labgruppen.com/support/nd_service_centre/ or contact Lab.gruppen by fax or email to obtain details for the nearest authorized service centre.

PLM+ SERIES Operation Manual rev 1.0.0

12. Warranty and Support

12.3.2. Factory Service

In the event a Lab.gruppen product requires factory service, you may contact Lab.gruppen’s service department for return instructions and a Return Authorization number.

Please note for product return:

1. Use the original packing.

2. Include a copy of the sales receipt, your name, return address, phone and fax number, email address and description of the defect.

3. Mark the Return Authorization number on the outside of the packing.

4. Ship the product prepaid to:

Lab.gruppen Faktorvägen 1 SE-434 37 Kungsbacka SWEDEN

Phone: +46 300 56 28 00 Fax: +46 300 56 28 99

service@labgruppen.com www.labgruppen.com

PLM+ SERIES Operation Manual rev 1.0.0

Notes

PLM+ SERIES Operation Manual rev 1.0.0

Notes

PLM+ SERIES Operation Manual rev 1.0.0

Notes

PLM+ SERIES Operation Manual rev 1.0.0

labgruppen.com

Intercooler, Class TD and Lake are national and/or international registered trademarks of Lab.gruppen AB. PLM+, Powered Loudspeaker

Management, R.SMPS, LoadLibrary, LoadSmart, SpeakerSafe, ISVPL, BEL, UVL and CAL are trademarks of Lab.gruppen AB. Dolby is a

registered trademark of Dolby Laboratories. Raised Cosine Equalization, LimiterMax and Iso-Float are trademarks of Dolby Laboratories.

Audinate is a registered trademark of Audinate Pty Ltd. Dante and Zen are trademarks of Audinate Pty Ltd. All other trademarks remain the

property of their respective owners.

Item no. OM-PLM+

Lab.gruppen PLM 20K44 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual