Crown CTs User Manual

Operation Manual

CTs Multi-Channel USP/CN Series

CTs 4200USP/CN

CTs 8200USP/CN

Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.

This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance.

The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.

Trademark Notice: Crown, Crown Audio, Amcron, Com-Tech, IQ System, and Multi-Mode are registered trademarks of Crown Inter national. HiQnet and System Architect are trademarks of Harman Pro Group. Other trademarks are the property of their respective own ers.

Some models may be exported under the name Amcron.

139309-4

10/10

CTs Multi-Channel Power Ampliﬁers

Important Safety Instructions

Importantes Instructions de Sécurité

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 reg isters, stoves, or other apparatus (including ampliﬁers) 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 ﬁt into your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched,

par ticularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11. Only use attachments/accessories speciﬁed by the manufac-

turer.

12. Use only with a cart, stand, tripod, bracket, or table speciﬁed

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 qualiﬁed 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 nor mally, or has been dropped.

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

mains.

16. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC

SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.

17. DO NOT EXPOSE THIS EQUIPMENT TO DRIPPING OR

SPASHING AND ENSURE THAT NO OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, ARE PLACED ON THE EQUIPMENT.

18. THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL

REMAIN READILY OPERABLE.

Wichtige Sicherheitsinstruktionen

Instrucciones de Seguridad Importantes

TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR BOTTOM COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

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 QUALIFIÉ SEULMENT.

PARA PREVENIR UN CHOQUE ELÉCTRICO, NO RETIRE LAS CUBIERTAS SUPERIOR O INFERIOR. NO EXISTEN PARTES QUE PUEDAN SER REPARADAS POR EL USUARIO AL INTE RIOR. REMITA EL SERVICICO AL PERSONAL TÉCHNICAL CALIFICADO.

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.

POUR DÉMONTER COMPLÈTEMENT L’ÉQUIPEMENT DE L’ALIMENTATION GÉNÉRALE, DÉMONTER LE CÂBLE D’ALIMENTATION DE SON RÉCEPTACLE. LA PRISE D’ALIMEN TATION RESTERA AISÉMENT FONCTIONNELLE.

PARA DESCONECTAR COMPLETAMENTE EL EQUIPO DEL SUMINSTRO ELECTRICO, DESCONECTE EL CABLE DE ALIMENTACION DE LA TOMA DE CA. LAS PATAS DEL CONEC TOR DEL CABLE DE ALIMENTACIÓN DEBERAN MANTENERSE EN BUEN ESTADO.

WATCH FOR THESE SYMBOLS:

The lightning bolt triangle is used to alert the user to the risk of electric shock.

The exclamation point triangle is used to alert the user to important operating or maintenance instructions.

REGARDEZ CES SYMBOLES:

La triangle avec le sigle ‘’foudre’’ est employée pour alerter l’utilisateur au risque de décharge électrique. Le triangle avec un point d’exclamation est employée pour alerter l’utilisateur d’instruction importantes pour lors opérations de mainte nance.

ATENCION CON ESTOS SÍMBOLOS:

El triángulo con el símbolo de rayo eléctrico es usado para alertar al usuario de el riesgo de un choque eléctrico.

El triángulo con el signo de admiración es usado para alertar al usuario de instrucciones importantes de operación o mantenimiento.

IMPORTANT

CTs Series ampliﬁers require Class 2 output wiring. Les ampliﬁcateurs de série de CTs exigent des câbles de sortie de classe 2. CTs-Reihe-Verstärker verlangen Klasse die 2 Produktionsverdrah tung. Los ampliﬁcadores de la Serie CTs requieren de un cableado de sal ida Clase 2.

MAGNETIC FIELD

CAUTION! Do not locate sensitive high-gain equipment such as preampliﬁers directly above or below the unit. Because this ampliﬁer has a high power density, it has a strong magnetic ﬁeld which can induce hum into unshielded devices that are located nearby. The ﬁeld is strongest just above and below the unit.

If an equipment rack is used, we recommend locating the ampliﬁer(s) in the bottom of the rack and the preampliﬁer or other sensitive equipment at the top.

FCC COMPLIANCE NOTICE

This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

CAUTION: Changes or modiﬁcations not expressly approved by the party responsible for complicance could void the user’s authority to operate the euqipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. 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 off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the

receiver is connected.

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

Crown International, Inc.

Issued By: Crown International, Inc.

European Representative’s Name and Address:

David J. Budge 10 Harvest Close Yateley GU46 6YS United Kingdom

Equipment Type: Commercial Audio Power Ampliﬁers Family Name: CTs Family Model Names: CTs 4200USP/CN, CTs 8200USP/CN

EMC Standards:

EN 55103-1:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions

EN 55103-1:1997 Magnetic Field Emissions-Annex A @ 10 cm and 20 cm EN 61000-3-2:2001 Limits for Harmonic Current Emissions (equipment input current less than or equal to 16 A per phase) EN 61000-3-3:2002 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current less than or equal to16A EN 55022:2003 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class A EN 55103-2:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity EN 61000-4-2:2001 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge) EN 61000-4-3:2001 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A) EN 61000-4-4:2001 Electrical Fast Transient/Burst Immunity (Criteria B) EN 61000-4-5:2001 Surge Immunity (Criteria B) EN 61000-4-6:2003 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A)

EN 61000-4-11:2001 Voltage Dips, Short Interruptions and Voltage Variation Safety Standard: IEC 60065: 2001 7th Ed. Safety Requirements - Audio Video and Similar Electronic Apparatus

I certify that the product identiﬁed above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended by 92/31/EEC, and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC.

Signed

1718 W. Mishawaka Road

Elkhart, Indiana 46517 U.S.A.

Andrew Stump Title: Director of Manufacturing

DECLARATION of CONFORMITY

COMPLIANCE QUESTIONS ONLY:

Sue Whitﬁeld 574-294-8289 swhitﬁeld@crownintl.com

Date of Issue: Jan 1, 2006

page 2 page 3

Operation Manual

DUE TO LINE CURRENT HARMONICS, WE RECOMMEND THAT YOU CONTACT YOUR SUPPLY AUTHORITY BEFORE CONNECTION.

Table of Contents

4-ohm (per ch.) 8-ohm (per ch.) 70V (per ch.)

1 kHz

CTs 4200USP/CN

20 Hz–20 kHz

Dual

4 Channels Driven

260W 180W 220W

215W 190W 220W

4-ohm (per ch.) 8-ohm (per ch.) 70V (per ch.)

1 kHz 20 Hz–20 kHz1 Channel Driven

270W 220W 250W

225W 210W 245W

8-ohm (per ch. pair) 16-ohm (per ch. pair) 100V (per ch. pair)

1 kHz 20 Hz–20 kHz

Bridge-Mono

2 Channel-Pairs Driven

520W 400W 220W

430W 380W 220W

8-ohm (per ch. pair) 16-ohm (per ch. pair) 100V (per ch. pair)

1 kHz 20 Hz–20 kHz1 Channel-Pair Driven

560W 440W 250W

450W 420W 245W

Maximum Average Power

in watts with 0.1% THD.

Constant Voltage full bandwidth power ratings support

100Hz - 20kHz due to automatic High-Pass Filters.

4-ohm (per ch.) 8-ohm (per ch.) 70V (per ch.)

1 kHz

CTs 8200USP/CN

20 Hz–20 kHz

Dual

8 Channels Driven

200W 160W 200W

175W 155W 185W

4-ohm (per ch.) 8-ohm (per ch.) 70V (per ch.)

1 kHz 20 Hz–20 kHz1 Channel Driven

270W 220W 250W

230W 220W 230W

8-ohm (per ch. pair) 16-ohm (per ch. pair) 100V (per ch. pair)

1 kHz 20 Hz–20 kHz

Bridge-Mono

4 Channel-Pairs Driven

400W 320W 200W

350W 310W 185W

8-ohm (per ch. pair) 16-ohm (per ch. pair) 100V (per ch. pair)

1 kHz 20 Hz–20 kHz1 Channel-Pair Driven

540W 440W 250W

460W 440W 230W

Maximum Average Power

in watts with 0.1% THD.

Constant Voltage full bandwidth power ratings support

100Hz - 20kHz due to automatic High-Pass Filters.

CTs Multi-Channel Power Ampliﬁers

Important Safety Instructions ........................................................ 2

Declaration of Conformity ............................................................. 3

1 Welcome ...................................................... 5

1.1 Features ............................................................................. 5

1.2 How to Use This Manual ..................................................... 5

2 Setup .......................................................... 6

2.1 Unpack Your Ampliﬁer ....................................................... 6

2.2 Install Your Ampliﬁer ..........................................................6

2.3 Ensure Proper Cooling ....................................................... 6

2.4 Front Panel Controls and Indicators .................................... 7

2.5 Back Panel Controls and Connectors ................................. 8

2.6 CobraNet and Control Module:

Connectors, Indicators and Controls .................................... 9

2.7 Choose Input Wire and Connectors .................................... 10

2.8 Choose Output Wire and Connectors ................................. 10

2.9 Audio Wiring ...................................................................... 11

2.9.1 Dual 8/4 Mode ........................................................... 11

2.9.2 Dual 70V Mode .......................................................... 11

2.9.3 Bridge-Mono 16/8 Mode ........................................... 12

2.9.4 Bridge-Mono 100V Mode .......................................... 12

2.10 Network Wiring Rules ....................................................... 13

2.11 Network Wiring ................................................................. 13

2.12 Audio and Aux Wiring ....................................................... 13

2.13 Connect to AC Mains ........................................................ 13

2.14 Startup Procedure ............................................................. 13

page 4 page 5

3 Operation .....................................................14

3.1 Precautions ........................................................................14

3.2 CobraNet and Control Module Features ..............................15

4 Advanced Features .........................................21

4.1 Using the Aux Connector ...................................................21

4.1.1 Aux Output .................................................................21

4.1.2 Aux Input ....................................................................21

4.1.3 Listen Bus Wiring .......................................................21

4.2 Protection Systems ........................................................... 22

4.2.1 Thermal Level Control ............................................... 22

4.2.2 Fault .......................................................................... 22

4.2.3 Fault Isolation Topology (FIT) ....................................22

4.2.4 35-Hz High-Pass Filter .............................................. 22

4.2.5 AC Under-Voltage/Over-Voltage Protection ............... 22

4.2.6 Power Fuse ............................................................... 22

4.2.7 Inrush Limiting .......................................................... 22

4.2.8 Variable-speed Fans ..................................................22

4.2.9 Switching Power Supply ........................................... 22

4.2.10 Mode Switch ........................................................... 22

4.2.11 Bridge Mode Indicator.............................................. 22

4.2.12 Channel Level Control ............................................. 23

5 Troubleshooting ............................................ 24

6 Speciﬁcations .............................................. 27

7 AC Power Draw and Thermal Dissipation ............... 31

8 Network and CobraNet Basics ............................ 33

8.1. Network Basics ................................................................ 33

8.2 A Closer Look at CobraNet ................................................ 34

8.2.1 Fast Ethernet .............................................................. 34

8.2.2 Audio Specs .............................................................. 35

8.2.3 Bundles and Audio Channels ..................................... 35

8.2.4 The Conductor ........................................................... 35

8.2.5 Repeater Networks ..................................................... 35

8.2.6 Switched Networks ..................................................... 35

9 Service ....................................................... 36

9.1. International and Canada Service ..................................... 36

9.2 US Service ........................................................................ 36

9.2.1 Service at a US Service Center ................................... 36

9.2.2 Factory Service ......................................................... 36

9.2.3 Factory Service Shipping Instructions ........................ 36

9.2.4 Packing Instructions .................................................. 36

9.2.5 Estimate Approval ...................................................... 36

9.2.6 Payment of Non-Warranty Repairs..............................36

10 Warranty ................................................... 37

Product Registration ..................................................................... 41

Crown Factory Service Information Form ..................................... 43

Operation Manual

1 Welcome

Building on the foundation of the Com-Tech® Series, Crown’s CTs Series offers new ﬂexibility and value for installed sound applications. The Com-Tech Series were the ﬁrst to offer independent selection of high- and lowimpedance operation for a speciﬁc channel, and CTs Series ampliﬁers continue that tradition, with power levels and features carefully chosen to perfectly inte grate into ﬁxed install design requirements.

Thanks to the factory-installed CobraNet and Control Module, each ampliﬁer is a network component. It con nects to the audio control/monitor network using stan dard 100Mb Ethernet hardware. With this protocol, an audio system can be interconnected using standard off-the shelf 100 Mb Ethernet components (switches, Net work Interface Cards, and cables).

The Crown CTs 4200USP/CN and CTs 8200USP/CN include SmartAmp features and 3rd-generation DSPbased components. Their SHARC DSP processor gives the user an enormous amount of digital signal process ing. Audio routing, faders, meters, polarity & mute, input compressors, ﬁlters, multimode output limiters, error reporting, and load monitoring are all available. A built-in noise generator and sine-wave generator pro vide noise masking and test capabilities.

In addition, the ampliﬁer allows the transport of realtime digital audio via CobraNet™ over the same 100Mb Ethernet network that is used for ampliﬁer control and monitoring. This provides a simple to install, singleplug solution for control, monitoring, and fullband width audio distribution. The ampliﬁer can function independently from the network control. Once the pro cessing is conﬁgured, the unit’s non-volatile memory allows the ampliﬁer to continue to function with no external control.

Please take the time to study this manual so that you can obtain the best possible service from your ampliﬁer.

1.1 Features

• Crown

Switching Power Supply for reduced weight

• High power-density, with eight channels in a 3U chassis and four channels in a 2U chassis

• Selectable constant-voltage (70V/100V) or lowimped ance (8/4 ohm) operation for each channel pair

• In the unlikely event of a channel failure, FIT (Fault Isola tion Topology) circuitry isolates faults within affected channels

• 35 Hz High-Pass Filter (70 Hz in CTs 4200) is automati cally inserted when the channel pair is set for constant-voltage operation. (corner frequency may be changed as a service option)

• Comprehensive array of indicators including Power and Data, along with Bridge, Ready, Signal, Clip, Thermal and Fault for each channel, provide accurate diagnostics

• Blue Power Indicator ﬂashes if the ampliﬁer shuts off due to an under-voltage or over-voltage condition on the AC mains

• Advanced protection circuitry guards against: shorted outputs, open circuits, DC, mismatched loads, general overheating, under-voltage or over-voltage, highfre quency overloads and internal faults

• Proven Crown AB+B Multi-Mode® output topology

• Continuously-variable-speed fans optimize cooling

efﬁ ciency

• Built-in CobraNet and Control Module connects to a CobraNet network. This allows a 100 Mbps Ethernet sin gle-plug solution for CobraNet audio, and HiQnet con trol and monitoring

• Analog audio inputs allow CobraNet network audio input, CobraNet audio backup, or a hardwire emergency override of CobraNet audio

• 24 bit digital to analog conversion with 32 bit, ﬂoating point DSP processing

• Up to 18 assignable ﬁlters per channel

• Over 2 seconds of delay available per channel

• Input compressors and output limiters for each

channel

• Noise generator for noise masking

• Sine generator

• Load supervision

• Full error reporting

• Firmware upgrades via the network

• 10 user selectable presets

• Reliable FLASH memory backup of all parameters

• Three Year, No-Fault, Fully Transferable Warranty

completely protects your investment and guaran tees its speciﬁcations

1.2 How to Use This Manual

This manual provides you with the necessary informa tion to safely and correctly setup and operate your ampliﬁer. It does not cover every aspect of installation, setup or operation that might occur under every condi tion. For additional information, please consult Crown’s Ampliﬁer Application Guide (available online at www.crownaudio.com), Crown Tech Support, your system installer or retailer.

We strongly recommend you read all instructions, warnings and cautions contained in this manual. Also, for your protection, please send in your warranty reg istration card today, or register online at www. crownaudio.com. And save your bill of sale—it’s your ofﬁcial proof of purchase.

CTs Multi-Channel Power Ampliﬁers

Power

Data

Bridge34Bridge

Fault

Thermal

Clip

Signal

Ready

CTs Multi-Channel Power Ampliﬁers

2 Setup

2.1 Unpack Your Ampliﬁer

Please unpack and inspect your ampliﬁer for any damage that may have occurred during transit. If damage is found, notify the transpor tation company immediately. Only you can ini tiate a claim for shipping damage. Crown will be happy to help as needed. Save the shipping carton as evidence of damage for the shipper’s inspection.

We also recommend that you save all packing materials so you will have them if you ever need to transport the unit. Never ship the unit

without the factory pack.

YOU WILL NEED (not supplied):

• Input wiring cables

• Output wiring cables

Rack for mounting ampliﬁer (or a stable surface for stacking)

WARNING: Before you start to set up your ampliﬁer, make sure you read and observe the Important Safety Instructions found at the beginning of this

manual.

2.2 Install Your Ampliﬁer

CAUTION: Before you begin, make sure your ampliﬁer is disconnected from the power source, with the power switch in the “off” position and all level controls turned completely down (counterclockwise).

Use a standard 19-inch (48.3-cm) equipment rack (EIA RS-310B). See Figure 2.1 for ampli ﬁer dimensions.

You may also stack amps without using a cabinet.

NOTE: When transporting, ampliﬁers should be supported at both front and back.

2.3 Ensure Proper Cooling

When using an equipment rack, mount units directly on top of each other. Close any open spaces in rack with blank panels. DO NOT block front, rear or side air vents. The side walls of the rack should be a minimum of two inches (5.1 cm) away from the ampliﬁer sides, and the back of the rack should be open.

Figure 2.2 illustrates standard ampliﬁer airﬂow.

2 Setup (continued)

2.4 Front Panel Controls and Indicators

Note: CTs 8200USP/CN is shown. Some CTs 4200 USP/CN features are in different locations.

A. Bridge Mode Indicator

Yellow LED, one per channel pair, illuminates when the channel pair’s Mode Switch is set to the “Bridge” position. If Mode switch is changed while ampliﬁer is powered up, Bridge LED will ﬂash, indicating that the ampliﬁer must be powered off and on to reset the Mode.

B. Ready Indicator

Green LED, one per channel, illuminates when the channel is initialized and ready to produce audio out put.

C. Signal Indicator

Green LED, one per channel, illuminates to indicate the presence of analog input signals above –40 dBu.

D. Clip Indicator

Red LED, one per channel, illuminates when the THD of the channel’s output signal rises to a level typically considered as the onset of audible clipping. The Clip Indicator also will illuminate during Thermal Level Control (TLC) or input overload.

E. Thermal Indicator

Red LED, one per channel, ﬂashes when the channel has shut down due to thermal stress or overload. If the power supply goes into thermal overload, all channel LEDs will ﬂash.

F. Fault Indicator

Red LED, one per channel, illuminates when the ampliﬁer output channel has stopped operating.

G. Ventilation Grille

Front-to-rear forced airﬂow.

H. Data Indicator

Yellow LED ﬂashes whenever a command addressed to the module is received. A similar LED is on the back panel, and the two LEDs ﬂash simultaneously.

I. Power Indicator

Blue LED indicates ampliﬁer has been turned on and AC power is available. Indicator also ﬂashes if the ampliﬁer shuts off due to an under/over-voltage condition on the AC mains.

J. Power Switch

Ampliﬁer is on when the switch is in the IN position.

Figure 2.2 Airﬂow

Figure 2.1 Dimensions

Left: CTs 4200USP/CN Right: CTs 8200USP/CN

Figure 2.3 CTs 8200USP/CN Front Panel

page 6 page 7

Operation Manual

CTs Multi-Channel Power Ampliﬁers

2 Setup (continued)

2.5 Back Panel Controls and Connectors

Note: CTs 8200USP/CN is shown. Some CTs 4200USP/CN features are in different loca tions.

K. AC Power Cord Connector

Standard IEC type 320 inlet. 120V models: 15-amp. 220-240V models: 10-amp. Voltage is indicated above IEC inlet.

L. Output Connectors

One four-pole terminal strip for every two chan nels with touch-proof cover. Accepts up to 10 AWG terminal forks. To connect outputs, ﬁrst remove the touch-proof cover plate covering the terminal strip by removing the screw which holds it in place.

M. USP/CN Module

Built into the ampliﬁer, this module allows con nection to a CobraNet network. Please see Sec tion 2.6 for details.

N. Channel Level Controls

One 21-position detented rotary potentiometer per channel, ranging from inﬁnity (-70 dB) to 0 dB attenuation. Refer to Section 4.2.12 for precise dB attenuation increments for each detent.

O. Input Connectors

Removable Phoenix-style barrier connectors for balanced input. Also can be used as a CobraNet input or a backup for Cobranet (see Section

3.2.6).

P. Mode Switch

Used on each consecutive pair of channels, this four-position switch is used to select the ampliﬁer’s mode of operation: Dual 8/4 ohms, Dual 70V, Bridge-Mono 16/8 ohms, and Bridge-Mono 100V.

IMPORTANT: Be sure to power off the ampliﬁer before change the Modeswitch setting. If this is not done, the Bridge

light will ﬂash to indicate that the power must be cycled off and back on to reset the mode.

Q. Cooling Vents

Front-to-rear forced airﬂow.

2 Setup (continued)

2.6 CobraNet and Control Module: Connectors, Indicators and Con trols

A. AUX Connector

AUX input, AUX output, and Foldback. See Sections 3.2.7, 3.2.8, and 4.1.

B. Preset Indicator

Signals the number of the current preset, if active, by ﬂashing a series of ﬂashes equal to the current preset number. See Section

3.2.2.

C. Reset/Preset Switch

Activated by inserting a small item, such as a paper clip, this switch is used to change presets, restore settings to factory default or restore all the presets to the factory defaults. During operations of the switch, the Data indicator ﬂashes as an aid to the user. See Section 3.2.9.

D. Data Indicator

Flashes when the ampliﬁer receives a valid command that is addressed to the ampliﬁer. See Section 3.2.1.

E. CobraNet Network Connectors

The dual RJ45 CobraNet connectors allow a Primary & Secondary connection to the 100 Mbps Ethernet network. Should the Primary connection lose link activity with the net work, the module will automatically switch to the Secondary connection to ensure uninterrupted audio and control. The indicators on the RJ45 connectors display network information concerning the Ethernet and CobraNet connections. See Sections

3.2.3, 3.2.4, and 3.2.5.

page 8 page 9

Figure 2.4 CTs 8200 USP/CN Back Panel

(Shown with Touch-proof Cover Removed)

Operation Manual

Figure 2.5 USP/CN Controls, Indicators and Connectors

(Note: Actual Product Artwork May Vary Slightly)

CTs Multi-Channel Power Ampliﬁers

CH 4

DUAL DUAL

BRIDGE

CH 3

CH 2

DUAL DUAL

BRIDGE

CH 1

CH 4

DUAL DUAL

BRIDGE

CH 3

CH 2

DUAL DUAL

BRIDGE

CH 1

70V

CTs Multi-Channel Power Ampliﬁers

2 Setup (continued)

2.7 Choose Input Wire and Connectors

If you will be connecting an analog audio signal to the CTs ampliﬁer, please read this section. Figure 2.6 shows connector pin assignments for balanced wiring, and Figure 2.7 shows connector pin assignments for unbalanced wir ing.

When possible, use balanced wiring for signal input, which provides better rejection of unwanted noise and hum. For more information, refer to the Crown Ampliﬁer Application Guide, available online at www.crownaudio.com

NOTE: Custom wiring should only be performed by qualiﬁed per sonnel.

2.8 Choose Output Wire and Connectors

Crown recommends using professionally constructed, high-quality, two- or four-conductor, heavy gauge speaker wire and connectors. You may use ter minal spade lugs or bare wire for your output connectors (see Figure 2.8). CTs ampliﬁer terminal strips accept up to 10 AWG terminal forks which ﬁt over a #8 screw. For best results, Crown recommends Panduit part #PV10-10LF-L or equivalent terminal spade lug. Screw spacing is shown in Figure 2.8.

To connect outputs, ﬁrst remove the touch-proof cover plate covering the ter minal strip by removing the screw which holds it in place.

To prevent the possibility of short-circuits, wrap or otherwise insulate exposed loudspeaker cable and connectors. Also, a touch-proof cover plate, which covers the terminal strips, is provided to help prevent short circuits. The cover plate should be reinstalled after connecting outputs.

Suggested below are guidelines to select the appropriate size of wire based on the distance from ampliﬁer to speaker. Check with local code as this may vary.

Distance Wire Size up to 25 ft. (7.6 m) 16 AWG

26-40 ft. (7.9-12.2 m) 14 AWG 41-60 ft. (12.5-18.3 m) 12 AWG Over 60 ft. (18.3 m) 10 AWG

CAUTION: Never connect the speaker return to the chassis of the ampliﬁer, or damage to the ampliﬁer may result.

CAUTION: Never use shielded cable for output wiring.

Figure 2.6 Balanced Input Connector Wiring

See the Crown Ampliﬁer Appli cation Guide, available

online at www.crownaudio.com, for pin assignments for commonly used connector types.

Figure 2.7 Unbalanced Input Connector Wiring

NOTE: CTs 8200 USP/CN is shown. Some CTs 4200 USP/CN features are in different locations.

Output panel

shown with

touch-proof

cover plate

removed.

Figure 2.8 Output Connector Wiring

(Typical of Two C hannels)

2 Setup (continued)

2.9 Audio Wiring

CAUTION: Never change the position of the Mode Switch while the ampliﬁer power is on.

2.9.1 Dual 8/4 Mode

Typical analog input and output wiring, along with level control and Mode Switch settings are shown in Figure 2.9. Make sure the Mode switch is set to the “Dual 8/4” position. Cobranet

input wiring is covered in Section 2.11.

INPUTS: Connect input wiring for each channel. OUTPUTS: Maintain proper polarity (+/–) on

output connectors. Connect the Channel 1 speaker’s positive (+) lead

to ampliﬁer Channel 1 positive terminal; repeat for negative (–). Repeat each channel wir ing as for Channel 1.

2.9.2 Dual 70V Mode

CAUTION: Never change the position of the Mode Switch while the ampliﬁer power is on.

Typical input and output wiring, along with level control and Mode Switch settings are shown in Figure 2.10. Make sure the Mode switch is set to the “Dual 70V” position.

INPUTS: Connect input wiring for each channel. OUTPUTS: Maintain proper polarity (+/–) on

output connectors. Connect Channel 1 positive (+) speaker load to

Channel 1 positive terminal of amp; repeat for negative (–). Repeat each channel wiring as for Channel 1.

See the Crown Ampliﬁer Appli cation Guide, available online at www.crownaudio.com, for pin assignments for commonly used connector types.

Output panel

shown with

touch-proof

cover plate

removed.

Figure 2.9 System Wiring and Control Settings, Dual Mode, 8/4 Ohm

Output panel

shown with

touch-proof

cover plate

removed.

Figure 2.10 System Wiring and Control Settings, Dual Mode, 70V

page 10 page 11

Operation Manual

CTs Multi-Channel Power Ampliﬁers

CH 4

DUAL DUAL

BRIDGE

CH 3

CH 2

DUAL DUAL

BRIDGE

CH 1

CH 4

DUAL DUAL

BRIDGE

CH 3

CH 2

DUAL DUAL

BRIDGE

CH 1

100V

CTs Multi-Channel Power Ampliﬁers

2 Setup (continued)

2.9.3 Bridge-Mono 16/8 Mode

CAUTION: Never change the position of the Mode Switch while the ampliﬁer power is on.

Typical analog input and output wiring, along with level control and Mode Switch settings are shown in Figure 2.11. Make sure the Mode switch is set to the “Bridge 16/8” position.

INPUTS: Connect input wiring only to the lower(odd-) numbered channel pair.

OUTPUTS: Connect the speaker across the posi tive terminals of each channel pair. Do not use the negative terminals of the channel pair when the pair is being operated in Bridge-Mono mode.

NOTE: When operating the channel pair in Bridge-Mono mode, turn down (full CCW) the level control for the higher (even)-numbered channel of the channel pair. The lower (odd)numbered level control works both channels.

2.9.4 Bridge-Mono 100V Mode

CAUTION: Never change the position of the Mode Switch while the ampliﬁer power is on.

Typical analog input and output wiring, along with level control and Mode Switch settings are shown in Figure 2.12. Make sure the Mode switch is set to the “Bridge 100V” position.

INPUTS: Connect input wiring only to the lower(odd-) numbered channel pair.

OUTPUTS: Connect the speaker across the posi tive terminals of each channel pair. Do not use the negative terminals of the channel pair when the pair is being operated in Bridge-Mono mode.

Figure 2.11 System Wiring and Control Settings, Bridge-Mono Mode, 16/8 Ohm.

Figure 2.12 System Wiring and Control Settings, Bridge-Mono Mode, 100V

See the Crown

Ampliﬁer Appli cation Guide, available

online at www. crownaudio. com, for pin assignments for commonly used connector types.

2 Setup (continued)

2.10 Network Wiring Rules

IMPORTANT: Please read the wiring rules below before installing the wiring.

Connect each device to the network through its own cable in a Star Network (Figure 2.13). Do not connect them in a serial fashion.

Make sure each device has its own Category 5 certiﬁed cable connecting it to a central concentrator, most often a switch.

2.11 Network Wiring

Use the cable to connect the Primary CobraNet connector to a 100 Mb port on the Ethernet switch that is used to form the CobraNet network. For more detail, see Section

3.2.3. We highly recommend that the CobraNet be a stan dalone or separate-network LAN.

Crown strongly recommends the use of a 100 Mb Ether net network for control and monitoring.

If network redundancy is required, use a standard CAT5 cable to connect the Secondary CobraNet connector to a 100Mb port on the auxiliary CobraNet network.

HiQnet control is available over the CobraNet network using Harman Pro System Architect software. The soft ware can set up CobraNet audio routing and addressing.

2.12 Audio and Aux Wiring

1. Connect the Audio Input Wiring. The ampliﬁer is equipped with removable barrier block connectors for each channel’s input. See Section 2.7 for more detail on audio wiring.

In System Architect, the analog balanced audio inputs can be set up to act either as CobraNet backup, an emer gency override of CobraNet audio, or as an audio input to the CobraNet network.

2. Connect the AUX wiring if used. See Section 4.1 for more information.

2.13 Connect to AC Mains

Connect your ampliﬁer to the AC mains power source (power outlet) with the supplied AC power cordset. First, connect the IEC end of the cordset to the IEC connector on the ampliﬁer; then, plug the other end of the cordset to the AC mains.

WARNING: The third prong of this connector (ground) is an important safety feature. Do not attempt to disable this ground connection by using an adapter or other methods.

Ampliﬁers don’t create energy. The AC mains voltage and current must be sufﬁcient to deliver the power you expect. If the AC line voltage varies out of an acceptable range, the ampliﬁer’s power supply turns off and the blue Power LED ﬂashes. The ampliﬁer will turn back on when the AC line voltage returns to safe operating levels. Fig ure 2.14 provides voltage limits for all ampliﬁer AC volt age

conﬁgurations. Also, the ampliﬁer must be run within the speciﬁed mains frequency requirements (indicated on the ampliﬁer’s back panel label). If you are unsure of the output voltage of your AC mains, please consult your electrician.

The various models have the following under-voltage limits and over-voltage limits:

Models

100VAC

(CTs 8200USP/

CN only)

120 VAC units 108VAC 132VAC

Under-Voltage

Limit

90VAC 110VAC

Over-Voltage

Limit

Figure 2.13 An Example of a Star Network

220V/230V/240V units 198VAC 264VAC

2.14 Startup Procedure

Use the following procedure when ﬁrst turning on your ampliﬁer:

1. Turn down the level of your audio source.

2. Turn down the level controls of the ampliﬁer.

3. Turn on the “Power” switch. The Power indicator should glow.

4. Turn up the level of your audio source to an opti mum level.

5. Turn up the Level controls on the ampliﬁer until the desired loudness or power level is achieved.

6. Turn down the level of your audio source to its nor mal range.

If you ever need to make any wiring or installation changes, don’t forget to disconnect the power cord.

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Operation Manual

CTs Multi-Channel Power Ampliﬁers

3 Operation

3.1 Precautions

Your ampliﬁer is protected from internal and external faults, but you should still take the fol lowing precautions for optimum performance and safety:

1. Before use, your ampliﬁer ﬁrst must be conﬁgured for proper operation, including input and output wiring hookup. Improper wiring can result in serious operating difﬁ culties. For information on wiring and con ﬁguration, please consult the Setup section of this manual or, for advanced setup tech niques, consult Crown’s Ampliﬁer Applica tion Guide available online at www. crownaudio.com.

2. Use care when making connections, selecting signal sources and controlling the output level. The load you save may be your own!

3. Do not short the ground lead of an output cable to the input signal ground. This may form a ground loop and cause oscillations.

4. WARNING: Never connect the output to a power supply, battery or power main. Elec trical shock may result.

5. Tampering with the circuitry, or making unauthorized circuit changes may be hazard ous and invalidates all agency listings, and may also void the product’s warranty.

6. Do not operate the ampliﬁer with the red Clip LEDs constantly ﬂashing.

7. Do not overdrive the mixer, which will cause clipped signal to be sent to the ampli ﬁer. Such signals will be reproduced with extreme accuracy, and loudspeaker damage may result.

8. Use caution when operating the ampliﬁer with a 2-ohm load impedance on 1 channel. Do not operate the ampliﬁer with less than a 2-ohm load impedance per channel when driving more than 1 channel. Due to the ampliﬁer’s output protection, such a conﬁg uration may result in premature clipping, speaker damage or a blown power fuse.

Remember: Crown is not liable for damage that results from overdriving other system compo nents.

3 Operation

3.2 CobraNet and Control Module Features

3.2.1 Data Indicator

An amber Data Indicator ﬂashes whenever a command addressed to the module is received. To assist with troubleshooting, an option that forces the Data Indicator to remain lit is available through the software. In addition, the locate feature in System Architect will cause the Data Indicator to blink rapidly to help you identify the unit. Another Data Indicator is on the ampliﬁer’s front panel, and it lights simultaneously with the module’s Data Indica tor.

3.2.2 Preset Indicator

A green Preset indicator signals the number of the current preset, if active, by continually ﬂashing a series of ﬂashes equal to the current preset number, followed by a pause. A preset is consid ered “active” if the USP/CN settings match those in the selected preset. If a change is made to any setting then the preset is con sidered “inactive,” and the indicator stops ﬂashing.

3.2.3 CobraNet Network Connectors

The Primary and Secondary CobraNet RJ-45 connectors can simultaneously interface to the 100 Mbps HiQnet network. While the Primary CobraNet connector is the main connection to the network, the Secondary connector is the “backup” or redundant connection to the network. If the Primary connection fails due to cut wire, failed network switch, etc., this port is automatically enabled and ready to receive the network data within a few sec onds.

Make connections with a standard CAT5 cable to a network switch port. Crown strongly recommends the use of switches and not hubs in the network. Hubs will limit the amount of CobraNet trafﬁc and create unnecessary limitations in the network.

If the ampliﬁer is not connected to a network, the CobraNet con nector can connect directly to a computer’s network adapter port using a crossover cable (TX and RX pairs swapped).

3.2.4 Link/Activity Indicator

The green Link/Activity indicator is provided on the network con nector to display the status of the Ethernet connection. Whenever the module is properly connected to another functioning network port, the indicator lights. When the module detects the presence of network trafﬁc, the indicator ﬂashes. The Link/Activity LED ﬂashes for all network trafﬁc, while the Data LED ﬂashes only for commands addressed to this USP/CN.

(continued)

.3.2.5 CobraNet In-Use/Conductor Indicator The indicator on the right side of each CobraNet RJ-45 connector turns ON if the port is in-use (i.e. the link is being used to trans mit or receive active CobraNet trafﬁc), and will blink if the device is also the conductor (the timing reference).

3.2.6 Balanced Audio Inputs

Located on the ampliﬁer rear panel, these removable barrier-block connectors allow line-level audio signals to be input to the USP/ CN. The ampliﬁer accepts line-level analog audio signals in addition to the digital audio from the CobraNet network. This analog audio can be used for one of three purposes:

• Backup of the CobraNet network audio: In the unlikely event of

a loss of CobraNet audio to the module, the module automati cally switches over to the balanced audio inputs.

• Emergency override: If an audio signal appears at the analog

inputs, the module switches to that signal.

• CobraNet network audio inputs: The amplier can act as a

CobraNet audio input source by converting the balanced audio input signal to CobraNet.

3.2.7 Aux Input/Output Connector

An RJ-11 connector provides three functions: AUX output, AUX input and Foldback. The AUX output is a multifunctional control output that delivers 15 VDC limited to 15 mA. It can be conﬁg ured in two modes:

• Manual mode: The output is simply controlled with a com mand from the software.

• Error reporting mode: The AUX out is active when the mod ule detects an error. Each error source (Thermal, Clip, Load, Amp Fault, and Line Voltage) can be individually enabled to activate the AUX output when the error conditions are met.

An inversion control allows the AUX output functionally to be inverted for the manual and error reporting modes. The inversion control is ignored for ﬂash preset mode.

The AUX input is a two-state input with a high state deﬁned as voltage between 4 and 15 VDC. The low state is deﬁned as volt ages between 0 and 1.6 VDC. It has a 10K input impedance. The AUX input can be conﬁgured in several modes:

• None: In this mode the module makes no changes to its operation. However, the AUX input status can be monitored through the control software and used for functions within the software.

• Mute All: This mutes the channels when the AUX input is active. Likewise, the Power Off Both function disables both channels during an active AUX input.

• AUX Input Inversion: This control allows the low state to activate the selected function. Normally, the high state activates the selected AUX input function.

The AUX port provides a power supply for the AUX input. This 15 VDC at 15 mA supply can be connected through a switch to the AUX input. This allows a simple switch closure to operate the aux input without the need of an external power supply. See Section

4.1 for details on using the AUX port.

3.2.8 Listen Bus or Foldback

The AUX port is also used for the Foldback connection. Two pins of the connector provide a balanced line-level audio output that can be selectively driven by either channel under System Architect software control.

3.2.9 Preset/Reset Switch

The Preset/Reset switch is a recessed pushbutton located between the Data and Preset indicators. It is activated by a straightened paper clip or similar object. This switch can be used to change presets, restore settings to factory default or restore all the presets to the factory defaults. During operations of the switch, the Data indicator ﬂashes as an aid to the user.

To select a preset:

1. Remove all audio input signals.

2. With the ampliﬁer powered up, momentarily hold the preset switch in for one ﬂash of the Data indicator (less than 2 seconds) and then release.

3. The ampliﬁer will load the next preset in the deﬁned preset range. The range of presets is deﬁned by the Maximum Preset and Min imum Preset controls. Once the Maximum Preset is reached, the next momentary depression of the switch will cycle the USP/ CN to the Minimum Preset.

4. The Preset indicator will ﬂash the number of the selected pre set followed by a pause.

5. Restore the audio input signals.

To restore the unit to factory default settings:

1. Remove all audio input signals.

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Operation Manual

CTs Multi-Channel Power Ampliﬁers

3 Operation (continued)

2. Hold the Reset/Preset switch in for two ﬂashes of the Data light (longer than 2 seconds).

3. The Data indicator will ﬂash rapidly for a moment.

4. Restore the audio input signals.

To restore the unit including presets to factory default settings:

1. Remove all audio input signals.

2. Hold the Reset/Preset switch while applying power to the unit.

3. The Data and Preset indicator will both light.

4. Release the switch within 5 seconds (before the Data and Pre set indicators go out).

5. The Data indicator will ﬂash rapidly for a moment.

6. Restore the audio input signals.

3.2.10 User Presets

The control settings for all the functions can be stored as presets. A total of ten presets can be saved in the USP/CN’s nonvolatile memory. Each preset can be named with a 30 character name describing its function, which is also stored in the USP/CN’s memory.

• The Store Preset Control saves the current setting to the speciﬁed preset.

• The Recall Preset Control recalls the speciﬁed preset set tings.

• The Preset Valid Monitor indicates if a change has been made to any setting since the last time a preset has be saved or recalled.

• The Last Stored or Recalled Preset Monitor indicates what the Last Stored or Recalled preset is.

3.2.11 Clip Event Monitor

A clip detector is provided each channel. These monitors will indicate any clip condition (> 0.05% distortion) in the ampliﬁer channel. The clip detectors also can indicate certain errors (See Section 3.1.25).

3.2.12 Input Signal Level Monitor

The input signal level of each channel can be monitored via Sys tem Architect software. The measurement range is from +20 dBu to –40 dBu with 0.5 dBu resolution. Each audio channel has the following monitors:

• Analog audio input: The audio input at the Balanced Audio

Inputs.

• Switched audio input: The audio input after the Input Audio

Router.

• CobraNet audio input: The audio input level from the selected

CobraNet audio channel.

3.2.13 Output Signal Level Monitor

The output signal level of each channel can be monitored via System Architect software. The measurement range is from 0 dB to –40 dB with 0.5 dB resolution. The monitors are scaled so that 0 dB is referenced to the full rated output voltage of the ampliﬁer.

3.2.14 Thermal Headroom Level Monitor

The thermal headroom level of each channel can be monitored with the software. This level represents the percent of available power/thermal capacity that is currently being used within the output section of the ampliﬁer. When the thermal headroom level reaches 100%, the ampliﬁer cannot produce any more power and it will begin to protect the output devices by limiting their drive level. The thermal limiter feature of the USP/CN can be set to engage at a pre-selected thermal level. (See Section 3.2.31).

3.2.15 Power/Standby Control

Each channel can be independently turned on and off.

3.2.16 Signal Mute

The output signal of each channel can be independently muted. This function produces a minimum 60 dB of attenuation.

3.2.17 Polarity Inverter

The input signal polarity of each channel can be independently inverted.

3.2.18 Input Signal Fader

Each input signal can be adjusted under software control. The gain range is +20dB to –100dB in 0.5 dB steps. Each analog Audio Input has two faders with these functions:

• Trim the Analog Audio Input signal before the Input Router.

• Trim the Analog Audio Input signal after the Input Router.

3.2.19 Ampliﬁer Information

At startup, the module extracts several useful items of informa tion about the host ampliﬁer. These include manufacturer, model, date code, and serial number. This information is stored in the software system inventory and is displayed on the software con trol panels.

3.2.20 User and Channel Labels

In IQwic, the module can store two user labels and channel labels. In System Architect, the module can store 4 or 8 channel labels and a unit label.These labels are 30-character strings that can be

set by the user to indicate the function of the ampliﬁer and its channels. For example, “LOWER RIGHT CLUSTER, FOR DELAY.”

3.2.21 Line Voltage Monitor

The AC line voltage supplied to the ampliﬁer can be monitored with this function. If the voltage is out of a safe area you can trigger an error.

3.2.22 Error Reporting

The module can detect three different error conditions per channel and errors in the AC line voltage. Each error type can be conﬁgured to report the error through the control network and/or the AUX port. Network reported errors appear in the control software’s Error Win dow.

The software offer many options to further report errors, including audible alerts, printout, email, pager, serial port and fax. The options are set in the software. The following describes each error source.

CLIP: The USP/CN can be conﬁgured to report if an excessive number of clip events occur in either ampliﬁer channel. The clip events are consider an error if they exceed the deﬁned count per the deﬁned unit of time. The Count Control sets the maximum number of events before the error is reported. The range is 1 to 100. The Time Control deﬁnes the amount of time that the events are counted before starting the counting process over. Its range is 1 to 10 seconds. Note: Clip events are deﬁned as the start of each clip and every 10 milliseconds the ampliﬁer is in clip thereafter. Using a high count setting with a short time setting may result in clip error never being detected.

THERMAL: Errors can be generated for excessive temperature in the output section of the ampliﬁer channel. The Threshold Control sets the level that, if exceeded, will generate the error report. This control has a range of 1 to 100%.

LOAD: If the load monitoring feature is activated, an error report can be generated if the load impedance moves outside the pre-selected range. See Section 3.1.33 for instructions on setting up load monitoring.

LINE VOLTAGE: The AC line voltage can be monitored and an error generated whenever the voltage is outside of the limits set at the factory.

3 Operation (continued)

3.2.23 Input Signal Compressor/Limiter

An input signal compressor/limiter is available for each channel. Five parameters control this feature:

Enable: Enables or disables this function.

Threshold: Sets the level, in dBu, above which the compressor

begins to attenuate the input signal. This level corresponds to the input level meter reading. The compressor is “feed-forward,” meaning that the level detection point is located before the gain control stage. The range is from +20 dBu to – 50 dBu.

Attack Time: Sets the attack time of the compressor. The attack time is deﬁned as the time it takes the compressor to attenuate the signal gain by 20 dB. The range is from 1 millisecond to 0.1 second.

Release Time: Sets the release time of the compressor. The release time is deﬁned as the time it takes the compressor to increase the signal gain by 20 dB. The range is from 10 millisec onds to 10 seconds.

Compression Ratio: Sets the compression ratio of the com pressor. The ratio is the relation between the amount of attenua tion applied by the compressor verses the amount that the input signal is over the threshold. The available settings are 2:1 to 32:1.

3.2.24 Peak Voltage Limiter

This limits the peak voltage output of the ampliﬁer. Four parame ters control this limiter for each channel:

Enable: Enables or disables this function.

Threshold: Sets the level, in absolute voltage, which the limiter

will allow from the ampliﬁer. The range is from 12 V

Attack Time: Sets the attack time of the limiter. The attack time is deﬁned as the time it takes the limiter to attenuate the output signal by 20 dB. The range is from 1 millisecond to 100 millisec onds.

to 255 V

Release Time: Sets the release time of the compressor. The release time is deﬁned as the time it takes the limiter to increase the output signal by 20 dB. The range is from 10 milliseconds to 10 seconds.

3.2.25 RMS Power Limiter

This limits the long-term output power of the ampliﬁer. Four parameters control this limiter for each channel:

Enable: Enables or disables this limiter.

Threshold: Sets the average power level, in watts, which the

limiter will allow from the ampliﬁer channel. The range is from 10 watts to 600 watts. This level should be set to the connected loudspeaker’s long-term power rating.

Attack Time: Sets the attack time of the limiter. The attack time is deﬁned as the time it takes the limiter to attenuate the output signal by 20 dB. The range is from 1 second to 30 seconds.

Release Time: Sets the release time of the compressor. The release time is deﬁned as the time it takes the limiter to increase the output signal by 20 dB. The range is from 1 second to 30 sec onds.

3.2.26 Load Supervision

The load supervision feature allows real-time monitoring of the load connected to each ampliﬁer channel. When enabled, the USP/CN continuously monitors the ampliﬁer output voltage and current, and calculates the long-term average load impedance. The measured load impedance is compared against the userdeﬁned high and low limits. If either limit is exceeded, the status indicator and, if enabled, the System Architect Error Reporting functions alert the user of the problem. There are six controls and two indicators for each channel:

pk.

Enable: Enables or disables the load-supervision function.

High Limit: Sets the upper bound above which the system will

report a “high” error status.

Low Limit: Sets the lower bound below which the system will report a “low” error status.

Nominal Load Impedance: Sets the expected average imped ance for the connected load. This value determines the output signal level required for the test. This parameter is also used by the average power limiter to determine the expected power threshold. (See Section 3.1.29).

Report Error to Network: Enables Error Reporting to send an error report via the network so that high and low load conditions are reported to the software.

Report Error to Aux: Enables and high or low load error to be reported by the AUX output. (See Section 4.1.1).

Test Indicator: This indicator is active when the ampliﬁer out put signal is sufﬁcient to allow load impedance calculation and test veriﬁcation.

Low/Normal/High Indicator: This indicator shows the present status of the load impedance with respect to the user-deﬁned high and low limits.

Z Average Monitor: Reports the actual calculated average load impedance in ohms. Its range is from 0 ohms to 250 ohms.

Load Supervision Applications

The Load Supervision feature can be used to monitor the ampli ﬁer load in real time with almost any program material. Average load impedance is calculated as a function of ampliﬁer output voltage and current. The system requires approximately 20-30 mA of average ampliﬁer output current for adequate supervision. This allows typically low average output power levels of less than ½ watt with most loads. The maximum load impedance for reli able system performance is limited to about 50 ohms. Higher impedances can be measured but may require higher ampliﬁer output levels for reliable operation.

page 16 page 17

Operation Manual

CTs Multi-Channel Power Ampliﬁers

3 Operation (continued)

Most ampliﬁer/load systems can be conﬁgured and supervised by following these steps:

1. Conﬁgure your audio system using a known “good” load, then enable the Load Supervision feature.

2. Provide typical program material at a level high enough to light the “test” indicator.

3. Run the system at this level until the average impedance stabi lizes. This may take seconds to minutes depending on level, duty-cycle, etc.

4. Set the nominal impedance at the measured value average. This optimizes the supervision algorithm for voltage and cur rent levels versus the actual load. Note: a higher nominal set ting will require higher output levels.

5. Set the high limit at twice average and the low limit at onefourth nominal. (These limits are somewhat arbitrary but should be a good starting point.)

6. Let the system run for extended periods using any and all typi cal program material.

7. Adjust the high/low limits, if necessary, to account for any variance in average measured impedance.

8. Enable error reporting, if desired.

This procedure should work well for most applications. However, some applications can be a little more difﬁcult. Some very lowlevel and/or low duty-cycle signals may not adequately “test” the load. Lab and situation testing have shown output levels as small 40 dB below rated ampliﬁer output to be enough for most lowimpedance loads. Higher impedance loads such as those used in “lightly-loaded” 70V distribution lines may require signal level near 20 dB below rated output.

The “Nominal Load Impedance” control is used to optimize the system for the most accurate calculation of load impedance. It should be set to the expected nominal (or rated) impedance of the “normal” load. The high limit should be set for at least 2 times the expected nominal or actual measured load, while the low limit should be set to ½ the expected nominal or actual mea sured load.

The following example calculates the SPL necessary for supervi sion of a typical 8-ohm system. While the resulting 80-dB SPL @ 1 meter is deﬁnitely above conversation level, it is not uncom fortable.

An “8 ohm” example:

30 mA into 8 ohms = 0.007watt. 8-ohm driver sensitivity = 100dB for 1W @ 1 meter.

0.007W/1W = –20dB. Required SPL for supervision test is 100dB – 20dB = 80dB SPL @ 1 meter.

3.2.27 Typical Load Characteristics

It is well known that the typical loudspeaker impedance is not the same for all frequencies. This variance is due to the effect of elec trical properties such as the expected increase in impedance at high frequencies due to driver voice-coil inductance, or the peaks and valleys due to passive crossovers. Testing of various passive boxes has shown peaks of 100 ohms or more! Lowfrequency impedance variation can come from the interaction of the driver compliance with that of the box. The low frequency variations are usually wide bandwidth and may vary from 6 to 30 ohms on an 8-ohm driver.

These anomalies are easily averaged out by the USP/CN supervi sion algorithm in most systems. However, there may be some extreme situations for very narrow bandwidth (i.e. singlenote) signals and/or very widely varying loads that the algorithm sim ply cannot overcome. In these cases, widening the high and low limits will help decrease the “sensitivity” of supervision and decrease the chance of “nuisance” error reports.

3.2.28 Filters

Each audio channel has ﬁve separate places where ﬁlters can be placed in the system. There are 64 ﬁlters total and they can be placed anywhere within the system. In addition to ﬁltering, each possesses up to ± 24 dB of gain. The ﬁlters will vary based on the ﬁrmware and software being run. The following ﬁlters are available:

• Lowpass: Bessel 2-4, Butterworth1-4, and Linkwitz-Riley 4 (Firmware 2.0 provides up to 8 Linkwitz-Riley ﬁlters)

• Highpass: Bessel 2-4, Butterworth1-4, and Linkwitz-Riley 4 (Firmware 2.0 provides up to 8 Linkwitz-Riley ﬁlters)

• Lowshelf: Low-frequency shelving EQ

• Highshelf: High-frequency shelving EQ

• Lowpass EQ: Variable Q from 0.1 to 35

• Highpass EQ: Variable Q from 0.1 to 35

• Parametric EQ: Variable Q from 0.1 to 35

• All-Pass: 1st and 2nd order

All-Pass ﬁlters provide no gain change to the output, but provide a phase change at the selected frequency. This corrects the phase relationship of the output without a gain reduction, such as is found in other ﬁlters.

3.2.29 Delay

Due to the nature of DSP processing, there is some inherent delay or latency within the system These delays are:

DSP processing: 1 ms or 1000 µs. Digital-to-analog conversion: 250 µs. Analog-to-digital conversion: 250 µs. Ampliﬁer: 100 µs.

In addition to these unavoidable delays, additional delay can be added to each channel. Each channel is capable of 2.0 seconds of delay in 20.8 µs increments. Overall delay = inherent delay + coarse delay + ﬁne delay.

3.2.30 Noise Generator

A noise generator shared between channels allows noise to be mixed into the audio signal. This is useful for noise masking applications and testing. Each channel has the following controls:

• Noise On/Off: The channel’s noise generator can be indepen dently turned on.

• Noise Type: Full spectrum white noise or pink noise.

• Noise Level: A fader to allow the noise level to be controlled.

3.2.31 Sine-wave Generator

A sine-wave signal generator allows the mixing of a single tone into the audio signal. Typical applications can be for the injection of a high frequency tone (19 kHz) into the signal in paging type system to continually drive the speaker, allowing continuous mon itoring of the speaker load. The following controls exist:

• Sine On/Off: The sine-wave signal generator’s function.

• Sine Frequency: Controllable from 20 Hz to 20 kHz.

• Sine Level: Each channel’s sine-wave signal level can be

independently controlled.

3.2.32 Input Signal Router

Each channel of the module’s signal processing has an Input Sig nal Router that lets you choose the audio signal that will be used by the channel. Choose one of the following conﬁgurations:

3 Operation (continued)

CobraNet Audio: Assign this in the CobraNet Input section of the software. See Section 3.3.2 for more details. Choices for the CobraNet Input are from any of four bundles, and any of the eight channels available.

CobraNet with Analog Backup: In this mode, if CobraNet audio is lost, the module automatically switches to the chosen Balanced Audio Input until CobraNet audio returns.

CobraNet with Analog Override: In this mode, if a signal appears on the Analog Input, the module’s input signal switches from CobraNet to the Analog Input. Then the CobraNet audio will be routed to the channel after 10 seconds.

3.3 CobraNet

CobraNet is a licensed technology developed by Peak Audio, Inc. consisting of proprietary communications protocol, ﬁrmware and hardware. It allows reliable, deterministic transmission of digital audio over a 100Base-T Fast Ethernet network. The ampliﬁer operates as a networked device on a CobraNet network, and interfaces digital audio from the network to the ampliﬁer. For a more thorough discussion about CobraNet technology, refer to Section 8.2 and visit Peak Audio’s CobraNet website at www. cobranet.info.

This section describes the ampliﬁer’s CobraNet control and mon itoring features. These features are accessed via the control soft ware. Please refer to the software documentation if you are unfamiliar with the software.

3.3.1 CobraNet Module Parameters

The internal CobraNet Network Interface Module contains several parameters for control and monitor of status of the CobraNet net work, and do not directly affect the control network. These vari ables can also be controlled and monitored through the CobraNet network using CobraCAD™ or other industry-standard SNMP-enabled network management software. CobraCAD is software that provides a GUI to design CobraNet networks. It can be downloaded from www.peakaudio.com.

Conductor

The Conductor is the device in a CobraNet network that acts as the master clock. Other devices are called “Performers.” Any CobraNet device can be conﬁgured to operate either as Network Conductor or a Performer.

• Active Indicator: This indicator, viewable in System Archi tect software, reports the present Conductor status of the device. If the indicator is ON, the unit is operating as the network Con ductor. When OFF, the unit is operating as a Performer.

• Priority: This parameter adjusts the priority level for becom ing the Conductor. When set to zero, the ampliﬁer will never function as the Conductor, and when set to 255 it will always function as the Conductor. The higher the priority number, the more likely unit will act as the Conductor. The Priority object is stored in presets.

System Name

This parameter can be set to any alpha-numeric string of 30 characters or less. It communicates a unique name for the partic ular device to a network. The System Name object is stored in presets.

System Description

This parameter is conﬁgured at the factory and is read-only. The intended use is to communicate a unique device description to a network.

System Location

This parameter is user-settable to any alpha-numeric string of 30 characters or less. The intended use is to communicate a unique description of the device location to a network. This object is stored in presets.

System Contact

This parameter is user-settable to any alpha-numeric string of 30 characters or less. The intended use is to communicate the des ignated contact person (in case of service or other network issue) to the network. This object is stored in presets.

Firmware Version

This parameter is conﬁgured at the factory and is read-only. The intended use is to communicate the presently loaded CobraNet module ﬁrmware version to a network.

MAC Address

This parameter is conﬁgured at the factory and is read-only. The setting deﬁnes a unique IEEE802-recognized address for use with any Ethernet based network.

IP Address

This IP address is for the CobraNet control ONLY. It is used by SNMP agents such as CobraNet Disco to control CobraNet speciﬁc functions.

This IP address should not be confused with the control system’s IP address that is used to control and monitor the CobraNet module.

3.3.2 CobraNet Input Routing

CobraNet input routing includes the following controls:

CobraNet Receive Bundles

The ampliﬁer can receive four unique CobraNet Bundles (RxA, RxB, RxC, RxD). Each Bundle includes an “Active” indicator to indicate whether the particular Bundle is being actively transmitted onto the network.

CobraNet Receive Channels

Each CobraNet Bundle contains up to eight digital audio channels. Each channel is selected at its respective transmitter to contain none, 16-, 20or 24-bit audio sample data. A total of four or eight audio channels can be processed by the USP/CN at any one time. Any of the eight channels on a bundle can be can be routed to either of the four or eight processing channel inputs on the USP/CN.

• Channel Label: Each received digital audio channel can be assigned a user-speciﬁed label to indicate intended use, source or other informa tion. The label is stored in presets along with the bundle number and receive channel information.

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Operation Manual

CTs Multi-Channel Power Ampliﬁers

321

AUX

CONNECTOR

TO BALANCED INPUT

–

CTs Multi-Channel Power Ampliﬁers

3 Operation (continued)

3.3.3 CobraNet Output Routing

CobraNet output routing includes the following controls:

CobraNet Transmit Bundles

The ampliﬁer can transmit up to four unique CobraNet Bundles (TxA, TxB, TxC, TxD). Each Transmit Bundle includes the follow ing controls and monitor functions:

• Receiver Count: This meter reports the number of CobraNet nodes actively receiving the Bundle being sourced to the network by this bundle.

• Transmit Priority: This control adjusts the relative priority for the particular transmitter. Higher numbers indicate a higher priority. One may choose to increase the transmitter priority for an emergency page microphone in a heavily loaded network. The Transmit Priority object is stored in presets.

CobraNet Transmit Channels

Each CobraNet Bundle can contain up to eight unique digital audio channels. Each channel is selected at its respective trans mitter to contain none, 16-, 20- or 24-bit audio sample data. A total of 32 channels can be transmitted by a single USP/CN at any one time; however, only 4 channels can be sent on up to four Bundles. The CobraNet Transmit Channel object is stored in pre sets.

Here are some features of CobraNet Transmit Channels:

• Output Ampliﬁer Audio: By sampling the actual output audio of the ampliﬁer, CobraNet allows remote access and moni toring of each ampliﬁer channel at the output of the ampli ﬁer! CobraNet extends the “Listen Bus” or foldback feature found on other PIP modules to any network user, allowing them to listen to the output of any networked ampliﬁer from any loca tion on the network.

• Balanced Audio Inputs: Analog audio entering the Bal anced Audio Inputs can be converted to digital, and sent onto the CobraNet network. This provides a very cost-effective means of CobraNet input.

4 Advanced Features

4.1 Using the AUX Connector

The AUX connector offers a means to tap some of the ﬂexibility of Harman Pro System Architect. It can be used to enable peripher als, send a signal to another system component, and send a line-level audio signal of the ampliﬁer’s output.

The AUX connector is an RJ-11 type. Pins 3 and 4 are used as a control output. Pins 2 and 3 function as a control input. Pin 5 is a voltage supply pin for use with the control input.

4.1.1 AUX Output

The AUX output provides a +15 VDC output, current limited to 10 mA, which can be switched on or off under software control. In its basic mode, the AUX output can be used to control auxiliary equipment. To control AC-line-powered equipment the AUX out put must actuate a relay. The relay would then turn on the auxil iary equipment. See Figure 4.1.

The AUX output has two enhanced modes: Error Reporting and Flash Preset. In Error Reporting mode, the AUX port can be set up to change state when any selected error (clip, thermal, amp fault, load impedance, and AC line level) is detected. With this feature, the AUX output of each ampliﬁer can be wired to a sepa rate light on a panel at the control location to indicate whether the ampliﬁer is or is not in error. Generally, the AUX output inverter is used for such a system. This way if the panel light is on the oper ator knows “all is well”. If it is off the operator knows the ampli ﬁer has an error or that it is not powered.

The other enhanced AUX output mode is Flash Preset. This mode allows remote indication of the selected preset. In this mode, the AUX output will ﬂash a number of times equal to the selected preset followed by a pause. By using the Change Preset AUX input mode and the Flash Preset AUX output mode, this allows a remote panel to function as a preset controller. The panel would contain a simple light and pushbutton connected to the AUX out put and input. See Figure 4.2.

4.1.2 AUX Input In its basic input mode, the AUX input allows an external input

source to be detected by the software. This input can be a tem perature sensor, door closure switch, or operator pushbutton. It can be used by the software to change conﬁguration settings on any or all system devices. See the System Architect Help ﬁles for exact information.

Pin 5 of the AUX input is a power-supply pin designed for use by the AUX input pin. Since the AUX input ﬂoats low, the AUX input can be triggered by just a simple switch closure between it and the AUX power pin. No external power supply is needed to oper ate the AUX input under most conditions. If the AUX input is used to sense a externally supplied voltage it must be scaled so that low inputs are between 0 and 1.6 VDC, and high inputs are between 4 and 15 VDC. Externally supplied voltages should be referenced to AUX ground on pin 3.

The AUX input allows the AUX input to mute or power-down all channels. The AUX Input Inversion Control allows either a high or low AUX input to activate these functions. This mode can be used for emergency shutdown for a ﬁre alarm system. A simple switch closure from the alarm system would disable an entire sound system when a ﬁre alarm is activated.

4.1.3 Listen Bus Wiring

The AUX port is also used for the Listen Bus or Foldback con nection (Figure 4.3). Pins 1 and 6 of the connector provide a bal anced line-level audio output that can be selectively driven by either channel under software control. Multiple ampliﬁers can have their Listen Bus outputs wired onto a single bus allowing the system operator to listen to any of their outputs.

Figure 4.2 Wiring a Remote Preset Selector

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Operation Manual

Figure 4.1 AUX Output Control of a Relay

Figure 4.3 Listen Bus Wiring

CTs Multi-Channel Power Ampliﬁers

4 Advanced Features (continued)

NOTE: For more information about these Crown ampliﬁer features, please visit the Crown web site at www.crownaudio.com.

4.2 Protection Systems

Your Crown ampliﬁer provides extensive protection and diagnostic capabilities, including thermal level control, fault indicators, automatic high-pass ﬁltering, DC pro tect, AC under-voltage and over-voltage protection, inrush limiting, and variable-speed fans.

4.2.1 Thermal Level Control (TLC)

If an ampliﬁer channel starts to overheat, the TLC circuit will engage that channel’s input compressor. By com pressing the input, the ampliﬁer will not generate as much heat and will have a chance to cool down. The degree of compression is proportional to the amount of overheating. If the channel becomes too hot for safe operation even after full TLC limiting, the channel will shut off, and the Thermal Indicator for that channel will ﬂash brightly to alert the user that a state of thermal stress or overload has cause the channel to shut down.

4.2.2 Fault

If an ampliﬁer channel requires service, the corresponding Fault indicator will illuminate to alert the user of this condition. If this occurs, return the ampliﬁer to the Crown factory or to an authorized Crown service center.

4.2.3 Fault Isolation Topology (FIT)

Crown’s new FIT (Fault Isolation Topology) design iso lates channel-speciﬁc faults, and prevents them from affecting remaining channels. If a CTs multi-channel amp is powering multiple zones, and a channel fails, the other zones continue to operate. FIT makes the CTs 4200USP/ CN and CTs 8200USP/CN the most trustworthy multichannel ampliﬁers in the business!

4.2.4 High-Pass Filter

A ﬁxed 35-Hz (70-Hz in CTs 4200USP/CN) high-pass ﬁl ter per channel pair is automatically inserted when the mode switch is set to either of the constant-voltage set tings. The high-pass ﬁlter corner frequency can be set to 70 Hz, or bypassed, with a service option.

4.2.5 AC Under-Voltage and Over-Voltage Protection

If the AC line voltage varies out of an acceptable range, the ampliﬁer’s power supply turns off and the blue Power LED ﬂashes. The LED will continue to ﬂash until the power has been cycled. Figure 4.4 provides voltage lim its for all ampliﬁer AC voltage conﬁgurations. Also, the ampliﬁer must be run within the speciﬁed mains fre quency requirements (indicated on the ampliﬁer’s back panel label). If you are unsure of the output voltage of your AC mains, consult your electrician.

Models

100VAC 90VAC 110VAC

120 VAC units 108VAC 132VAC

220V/230V/

240V units

Figure 4.4 AC Under-Voltage and

Over-Voltage Limits for Various Ampliﬁer

4.2.6 Power Fuse

A fuse protects the ampliﬁer from excessive AC current draw.

4.2.7 Inrush Limiting

A soft-start circuit in the power supply minimizes the ampliﬁer’s current draw during power-on.

Under-Voltage

Limit

198VAC 264VAC

Models

Over-Voltage

Limit

4.2.8 Variable-speed Fans

Continuously variable speed fans direct the airﬂow through the ampliﬁer for cooling.

4.2.9 Switching Power Supply

Crown’s new Switching Power Supply minimizes the ampliﬁer’s weight.

Typical non-switching power supplies require large, heavy transformers in order to produce the required power at the output stage. These transformers must be large to absorb the substantial waste that occurs when operating at 50 to 60 Hz (standard AC supplied by the power company).

By contrast, switching power supplies can operate with a much smaller (and lighter) transformer because they ﬁrst convert the AC up to a much higher frequency, thereby reducing waste.

The power supply is voltage-speciﬁc, allowing use in regions using 120V/60Hz, 220V/50Hz, 230V/50Hz, 240V/50Hz, and 100V/50Hz AC mains.

4.2.10 Mode Switch

Each consecutive pair of channels has one four-position switch that selects the ampliﬁer’s mode of operation. The switch positions are:

• Dual mode for 4 or 8 ohm operation.

• Dual mode for 70V constant-voltage operation.

• Bridge-Mono mode for 8 or 16 ohm operation.

• Bridge-Mono mode for 100V constant-voltage

oper ation.

Be sure to turn off the ampliﬁer before changing the Mode-switch setting.

4.2.11 Bridge Mode Indicator

This yellow LED indicates when the ampliﬁer’s mode switch is set to the Bridge position. Each consecutive pair of channels has one Bridge LED.

4 Advanced Features (continued)

4.2.12 Channel Level Control

The signal level for each input can be attenu ated accurately by adjusting the 21-step Level Control (see Section 2.5). Figure 4.5 shows the amount of attenuation in dB for each detent.

Note: Attenuation per detent varies with operat ing mode since gain varies with operating mode. Attenuation amounts shown may vary ±6%.

ATTENUATION in dB

Detent 4/8 Ohm 70V 100V

0 (full CCW) -68.31 -72.90 -71.02

1 -67.54 -72.06 -70.26

2 -32.23 -36.61 -34.90

3 -25.46 -29.74 -28.00

4 -21.83 -25.87 -24.22

5 -19.23 -23.20 -21.58

6 -17.12 -20.94 -19.40

7 -15.36 -19.02 -17.53

8 -13.76 -17.22 -15.79

9 -12.28 -15.53 -14.20

10 -10.84 -13.90 -12.62

11 -9.51 -12.32 -11.16

12 -8.28 -10.87 -9.81

13 -7.09 -9.45 -8.45

14 -6.30 -8.11 -7.22

15 -4.92 -6.70 -5.94

16 -3.82 -5.26 -4.63

17 -2.62 -3.70 -3.21

18 -1.35 -1.90 -1.66

19 -0.01 -0.01 -0.01

20 (full CW) 0.00 0.00 0.00

Figure 4.5 Level-control Attenuation per Detent

page 22 page 23

Operation Manual

CTs Multi-Channel Power Ampliﬁers

5 Troubleshooting

CONDITION: Power indicator is off.

POSSIBLE REASON

• The ampliﬁer has lost AC power.

• The ampliﬁer’s Power switch is off.

• The ampliﬁer is not plugged into the

power receptacle.

• The ampliﬁer output level is so high that the power supply fuse has blown. Verify that input levels and output impedances are within safe ranges. Refer the unit to an authorized Crown service center for fuse replacement.

CONDITION: Power indicator is ﬂashing.

POSSIBLE REASON:

• The AC line voltage has dropped below 10% or has risen above 10% of the nominal line voltage of the power supply.

Refer to section 5.1.6 for speciﬁc voltage requirements.

CONDITION: Fault indicator is on.

POSSIBLE REASON:

• The ampliﬁer channel has stopped oper ating. Return the unit to an authorized Crown Service Center.

CONDITION: Distorted sound.

POSSIBLE REASON:

• Load is wired incorrectly or Dual/Bridge mode switch is set incorrectly. Check both.

• Input is overloaded by a signal level that is too high. Turn down your ampliﬁer level controls, or turn down the input sig nal, until the clip light goes out.

• Thermal Level Control (TLC) is active.

Note: If the signal sounds distorted even though the Clip LED is off, the input signal is distorted. Check gain staging and output lev els of the mixer or preamp.

5 Troubleshooting (continued)

CONDITION: No sound, even though the amp has power. Power LED is on

without ﬂashing and the amp is receiving an input signal. Signal indicator is ﬂashing.

• Speakers not connected.

• Open circuit due to speaker failure.

• Level control is down.

• There is a short on the ampliﬁer

output. First disconnect your speakers from the affected channel(s) one by one to determine if one of the loads is shorted.

• DC or excessive low-frequency signal at the ampliﬁer’s output has enabled speaker protection.

CONDITION: Thermal indicator is ﬂashing.

POSSIBLE REASON:

• The ampliﬁer has become too hot for safe operation. Check for loads less than 2 ohms, and for excessive input levels. Check for proper ventilation and proper mode-switch setting. Driving lowimpedance loads while in high-voltage mode can cause overheating.

CONDITION: All channel thermal indicators are ﬂashing.

POSSIBLE REASON:

• Power supply thermal overload.

CONDITION: No input signal.

(Signal indicator is not ﬂashing even though audio is applied and channel is ready).

POSSIBLE REASON:

• Input signal level is very low.

• Input cables have become disconnected.

CONDITION: Bridge LED is ﬂashing.

POSSIBLE REASON:

• The mode switch was switched while the power was on.

page 24 page 25

Operation Manual

CTs Multi-Channel Power Ampliﬁers

5 Troubleshooting (continued)

Problem: Data indicator is not ﬂashing, even though a valid com mand was sent.

Possible causes:

• Command was not addressed to the USP/CN.

• Network cable is disconnected or broken.

To assist with troubleshooting, System Architect can set an option for force the data indicator on.

Problem: Green Preset indicator is ﬂashing, or is not ﬂashing.

Possible cause: This is not a problem. This indicator signals the

number of the current preset, if active, by ﬂashing a series of ﬂashes equal to the current preset number. A preset is considered “active” if the USP/CN settings match those in the selected preset. If a change is made to any setting then the preset is considered “inactive,” and the indicator stops ﬂashing.

Problem: Both right indicators ﬂash yellow in unison to report a fatal error.

Possible cause: An unexpected condition within the CobraNet inter face has been detected.

NOTE: Actual product artwork may vary slightly.

Problem: Green LINK/ACTIVITY indicator in network connector does not illuminate or ﬂash.

Possible cause: Ethernet link is broken, or network connection is 10 Mbps. Check Ethernet connections to the network switch.

Problem: Computer does not communicate with the network devices.

Possible cause: Incorrect wiring. See Section 2.10 on network wiring.

6 Speciﬁcations

Performance CTs 4200USP/CN CTs 8200USP/CN

Frequency Response (at 1 watt, 20 Hz - 20 kHz) ± 0.5 dB ± 0.5 dB Phase Response (at 1 watt, 10 Hz - 20 kHz) ± 35° ± 35° Signal to Noise Ratio below rated power (20 Hz to 20 kHz) 100 dB unweighted 100 dB unweighted Total Harmonic Distortion (THD) at 1 watt, from 20 Hz to 20 kHz < 0.05% < 0.05% Intermodulation Distortion (IMD) 60 Hz and 7 kHz at 4:1,

from 163 milliwatts to full bandwidth power, typical Damping Factor: 10 Hz to 400 Hz >180 >180 Crosstalk (below rated power, 20 Hz to 1 kHz) > 80 dB > 80 dB Common Mode Rejection (CMR) (20 Hz to 1 kHz) > 50 dB > 50 dB DC Output Offset (Shorted input) < ± 5 mV < ± 5 mV Input Impedance (nominal) (balanced, unbalanced) 20 kilohms, 10 kilohms 20 kilohms, 10 kilohms Maximum Input Level (before input compression) + 20 dBu + 20 dBu Load Impedance (Note: Safe with all types of loads)

Stereo Bridge Mono

Voltage Gain (at maximum level setting), 1.4V sensitivity 4/8 Ohm Operation 70V Operation 100V Operation

Required AC Mains (model dependent) 120V, 60 Hz. 220/230/240V, 50 Hz 100V, 50/60 Hz. 120V, 60 Hz. 220/230/240V, 50 Hz Power Draw at Idle (120VAC mains, all channels in 4/8 ohm mode) 70W 70W Power Draw at Idle (120VAC mains, all channels in 70V mode) 114W 114W Cooling Continuously variable speed forced air, front-to-back airﬂow Continuously variable speed forced air, front-to-back airﬂow Dimensions: Width, Height, Depth 19 in. (48.3 cm) W x 3.5 in. (8.9 cm) H x 16.25 in. (41.3 cm) D 19 in. (48.3 cm) W x 5.25 in. (13.3 cm) H x 16.25 in. (41.3 cm) D Net Weight, Shipping Weight 26 lb. 6 oz. (12 kg), 30 lb. 14 oz. (14 kg) 36 lb. 6 oz. (16.5 kg), 47 lb. (21.3 kg)

The following speciﬁcations apply to all models in Dual 8/4 ohm mode with 8-ohm loads unless otherwise speciﬁed.

< 0.05% < 0.05%

4/8 and 25 ohms (70V)

8/16 and 50 ohms (100V)

20:1 (26 dB) 50:1 (34 dB)

71.4:1 (37 dB)

4/8 and 25 ohms (70V)

8/16 and 50 ohms(100V)

20:1 (26 dB) 50:1 (34 dB)

71.4:1 (37 dB)

USP/CN (CobraNet Module) Speciﬁcations

Memory Backup: 4 Megabit non-volatile FLASH memories for

backup of run-time parameters, presets, and program storage. Capa ble of 10,000 write cycles. Communications: 100 Mb Fast Ethernet conforming to IEEE 802.3.

page 26 page 27

Operation Manual

Overall Audio Performance: DSP Processing: Two processors, 32 bit, ﬂoating point, 724 µs

latency.

DAC Conversion: 24 bit, 250 µs latency. Dynamic Range: 103 dB typical (A-weighted, 20Hz–20kHz, audio

sourced from muted CobraNet channel).

Distortion: < 0.1% THD+N, 20Hz–20kHz. Frequency Response: ± 0.5 dB, 20Hz–20kHz. Input/Output Monitor Accuracy: Typically ±1dB. Maximum Input Level: + 20 dBu. ADC Conversion: 24 bit, 250 µs latency.

CTs Multi-Channel Power Ampliﬁers

6 Speciﬁcations (continued)

Figure 6.1 CTs 8200USP/CN Typical Frequency Response (1 W)

6 Speciﬁcations (continued)

Figure 6.4 CTs 8200USP/CN Typical Output Impedance vs. Frequency

Figure 6.2 CTs 8200USP/CN Typical Phase Response (1 W)

Figure 6.3 CTs 8200USP/CN Typical Damping Factor vs. Frequency

page 28 page 29

Operation Manual

Figure 6.5 CTs 8200USP/CN Typical Crosstalk vs. Frequency

Channels Driven

1 kHz 20 Hz - 20 kHz 1 kHz 1 kHz 20 Hz - 20 kHz

4 Ohm 260 215 270 270 225 8 Ohm 180 190 210 220 210

70V

(

25 Ohm) at 0.1% THD

220 220* 240 250 245*

Channel Pairs Driven

1 kHz 20 Hz - 20 kHz 1 kHz 20 Hz - 20 kHz

520 430 560 450 400 380 440 420 220 220* 250 245*

8 Ohm 16 Ohm 100V (50 Ohm)

Bridge-Mono Mode

CTs 4200USP/CN: MINIMUM GUARANTEED POWER

(in watts, 0.1% THD) 120VAC, 60 Hz units

Dual Mode

at 0.1% THD

* Constant Voltage full bandwidth power ratings support 100 Hz - 20 kHz due to automatic high-pass filters.

160

200

175 155 185*

250

190

220

260 200 240

270 220 250

230 220 230*

400 320 200

350 310 185*

540

440

250

460 440

230*

500 380

220

Bridge-Mono Mode

8 Ohm 16 Ohm 100V (50 Ohm) at 0.1% THD

70V (25 Ohm) at 0.1% THD

8 Ohm

4 Ohm

Channels Driven

Dual Mode

1 kHz 1 kHz 1 kHz

1 kHz

20 Hz - 20 kHz

1 kHz

20 Hz - 20 kHz

1 kHz

1 kHz 20 Hz - 20 kHz

CTs 8200USP/CN: MINIMUM GUARANTEED POWER (In watts, 0.1% THD) 120VAC, 60 Hz units

* Constant Voltage full bandwidth power ratings support 100 Hz - 20 kHz due to automatic high-pass filters.

AC Power Draw and Thermal Dissipation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120VAC mains. Line current figures for 230VAC units derived by multiplying 120VAC figures by 0.5. Data based on all channels driven.

watts in

watts out dissapated

Btu/hr kcal/hr

At Idle (8.4 Ohm mode )

70 070 239 60

At Idle (70/100V mode)

114 0 114 389 98

1/8th Power Pink Noise 8 Ohms/Ch.

200x4

Typical of program material

16 Ohms Bridge

400x2

just at clip.

4 Ohms/Ch.

260x4

8 Ohms Bridge

520x2 70V/Ch. 220x4 100V Bridge 220x2

1/3rd Power Pink Noise 8 Ohms/Ch.

200x4

Typical of program material

16 Ohms Bridge

400x2

with severe clipping.

4 Ohms/Ch.

260x4 8 Ohms Bridge

520x2 70V/Ch. 220x4 100V Bridge 220x2

382 1303 3297.9 4.0 668 286

391 1336 337

11.8 5.9 1005 349 655 2236 564

7.6 3.8 648 257

318 1084 2735.3 2.7 427 110

301 1027 259

7.8 3.9 639 134 505 1722 434

5.2 2.6 400 99

CTs 4200

Load

Rated

Power

Line Current

120VAC

Line Current

230VAC

Watts

Thermal Dissipation

6 Speciﬁcations (continued)

Figure 6.1 CTs 4200USP/CN Minimum Guaranteed Powe r

CTs Multi-Channel Power Ampliﬁers

7 AC Power Draw and Thermal Dissipation

page 30 page 31

Figure 6.2 CTs 8200USP/CN Minimum Guaranteed Powe r

Operation Manual

CTs Multi-Channel Power Ampliﬁers

AC Power Draw and Thermal Dissipation:

watts in

watts out dissapated

Btu/hr kcal/hr

At Idle (8.4 Ohm mode )

70 070 239 60

At Idle (70/100V mode)

114 0 114 389 98

1/8th Power Pink Noise 8 Ohms/Ch.

160x8

Typical of program material

16 Ohms Bridge

320x4

just at clip.

4 Ohms/Ch.

200x8

8 Ohms Bridge

400x4 70V/Ch. 200x8 100V Bridge 200x4

1/3rd Power Pink Noise 8 Ohms/Ch.

160x8

Typical of program material

16 Ohms Bridge

320x4

with severe clipping.

4 Ohms/Ch.

200x8 8 Ohms Bridge

400x4 70V/Ch. 200x8 100V Bridge 200x4

CTs 8200

Load

Rated

Power

Line Current

120VAC

Line Current

230VAC

Watts

Thermal Dissipation

8.7 4.3 725 172 553 1889 476

13.3 6.7 1155 218 938 3200 807

10.1 5.1 857 203 653 2230 562

13.1 6.5 1136 437 699 2385 601

19.3 9.7 1748 557 1190 4062 1024

15.3 7.7 1344 552 792 2702 681

Computer

Laptop

100Mb Switch

PIP-Lite

PIP-USP3

PIP-USP3/CN

100Mb Switch

IP Router

Computer

Wireless Access Point

Laptop

AUDIO NETWORK VENUE NETWORK

CTs Multi-Channel Power Ampliﬁers

7 AC Power Draw and Thermal Dissipation (continued)

8 Network and CobraNet Basics

This section provides additional information about HiQnet or Network basics. For more information about any of these topics, contact Crown Technical Support. For AUX connector wiring,

see Sections 3.2.7 and 4.1.

8.1 Network Basics

HiQnet is a network-based protocol that can control and monitor networked components over a common TCP/IP network. For components that have CobraNet capability, HiQnet can control and monitor these components over the same Ethernet network used for CobraNet audio, resulting in a single Category-5 con nection for control, monitoring, and digital audio. Figure 8.1 shows a typical TCP/IP network.

TCP/IP offers a number of advantages over other non-network communications platforms.

• The use of “off-the-shelf” networking hardware. This technology makes use of network connectivity and hardware commonly used in the computer industry, making it both low-cost and readily available.

• Better Performance. The capacity for real-time display of meters is greatly enhanced through the use of the wide-band width network.

• Single connection for both CobraNet audio and con trol communications. Gone are the days of multiple connec tions to

a component for audio and control. A single CAT5 connection handles it all.

Some of the features of HiQnet include:

• Ability to quickly discover all components connected to the network.

• Synchronization of multiple control points on a network.

• Components on different Local Area Networks (LANs) through

the use of an IP router (Figure 8.2).

• Component ﬁrmware upgrades via the network.

Ethernet Networks are established through the use of either a hub or a switch. These devices are centralized in the network and transfer the Ethernet data from point to point. Ethernet data is transferred in data packets that have addresses coded into their structure. Hubs and switches decipher these addresses and route the data packets to the appropriate component. Hubs do this by taking packets from any port and sending them out all other ports. Switches, on the other hand, are more intelligent and examine each packet’s address, sending that packet only to the addressed component. This results in a much more efﬁcient data ﬂow.

Communications between networks is allowed, but requires the use of a special piece of equipment called an IP Router (Figure

8.2). The router acts as a Gateway to allow this communication to exist. Any data trafﬁc that is to go to the other network is routed through the IP Router. The CobraNet data is held behind but IP data goes through.

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Operation Manual

Figure 8.1 A Typical TCP/IP Network

Figure 8.2 Two Networks Connected by an IP Router

CTs Multi-Channel Power Ampliﬁers

8 Network and CobraNet Basics (continued)

Each component has three identiﬁers that are used in the HiQnet system:

• Media Access Control (MAC) Address

• Internet Protocol (IP) Address

• HiQnet Address

Let’s explain each identiﬁer.

Media Access Control (MAC) Address: This is a physical address that speciﬁes a speciﬁc physical network component. This address is predeﬁned during manufacture and cannot be modiﬁed. No two network components have the same MAC address and each component is uniquely identiﬁed by its MAC address. This 48 bit address is located on the outside of every HiQnet component and is shown in hexadecimal format as 6 twobyte octets such as:

00-0A-40-00-DC-2F

Internet Protocol (IP) Address: The IP address of a

compo nent is assigned during the setup of the network and identiﬁes the IQ component to a larger audience. Because the MAC address is limited to a single physical LAN, communications between LANs is impossible solely through the use of the MAC address. The IP address allows components and controllers on other networks to communicate with each other through the use of an IP Router as shown in Figure 8.2.

This allows the network designer to isolate network trafﬁc from each other. For example, when using wireless devices to control HiQnet components, the bandwidth limitation of wireless devices will not allow them to reside on the same network with CobraNet. As a result, the use of an IP router and a separate network allows the wireless con trollers to access the IQ components through the router using IP addressing. The IP address appears as four numbers (0-255) sepa rated by periods, such as:

192.168.0.1

HiQnet Address: HiQnet or TCP/IQ components will be addressed

with a unique number from 1 to 64,000 and are assigned within the software. The Subnet Mask is four numbers (0-255) separated by peri ods. For example, a subnet mask of 255.255.25.0 and an IP address of 192.168.0.127 says that all IP addresses in that LAN are in the IP address range of 192.168.01 to 192.168.0.255.

If a controller is on a different network than the audio components, communications must occur through an IP router. discovery requires the use of broadcast Ethernet data packets onto the network. These broadcast commands cannot be done through an IP router, therefore a Discovery Proxy is required. The establishment of this proxy is done in by naming the IP address of a known component on the component network as the Discovery Proxy. In System Architect it is done in Tools > Options > Network Settings > Manage Network Connections.

8.2 A Closer Look at CobraNet

Licensed by Cirrus Logic, CobraNet is a protocol, ﬁrmware and hard ware that lets you transmit digital audio over a 100Base-T FastEther net network.

This section provides an overview of CobraNet. Peak Audio has pro vided a number of technical papers that describe CobraNet in detail. These papers are available at www.cobranet.info.

8.2.1 Fast Ethernet

(100Base-T)

Fast Ethernet (100Base-T) runs at 100Mbps (Megabits per second). It uses a hub or network switch to interconnect all network nodes (com ponents). This forms a star network (see Figure 8.3). In a star network, all PCs are connected to a centralized hub or switch. Messages are sent from the originating PC to the hub, which then transmits the mes sage either to the whole network or, if a switched hub (network switch) is used, to the destination device only.

In larger Fast Ethernet networks, additional hubs, concentrators, and other network hardware are used to form a larger network, as shown in Figure 8.4.

Today, commonly available networking cards are 10/100Base-T capa ble, which allows them to be used on either 10BaseT or 100Base-T networks.

The maximum length of cable for CobraNet is the same as for Ethernet: 100 meters over CAT-5 copper cable, 2 kilometers over multimode ﬁber. Proprietary “Fast Ethernet via single mode ﬁber” networks can reach even further.

8 Network and CobraNet Basics (continued)

8.2.2 Audio Specs

Sample rate: CobraNet can handle sample rates of 48 kHz or 96 kHz, but PIP cards work only at 48 kHz. They cannot receive audio from devices operating at 96 kHz.

Bit depth: Set each channel to transmit 16-, 20- or 24-bit audio data as desired.

Latency: The transmitter and receiver buffering required for reliable transmission is selectable between 1.33, 2.66 and 5.33 ms (64, 128, and 256 samples).

8.2.3 Bundles and Audio Channels

You will be assigning all audio channels to groups called Bundles for transmission over the CobraNet network. Bundles were formerly called Network Channels.

A bundle can carry up to 8 audio channels. Up to eight bundles can be sent in a 100 Mbps line, depending on the signal’s bit depth and sam pling rate.

The usual assignment is 8 channels at 20 bits. You can use fewer channels per bundle, but maximum size bundles are suggested for the most efﬁcient use of network bandwidth. If 24-bit data is desired, then only 7 audio channels can be loaded into a single Bundle.

In System Architect, you create audio connections between sending devices (transmitters) and receiving devices (receivers). For example, a mixer could be a transmitter, and a power amp could be a receiver.

You assign each connection a Bundle number. The Bundle number indicates which devices are communicating with each other.

Also in System Architect, you address each connection as Multicast or Unicast. A Multicast (Broadcast) connection is from one transmitter to multiple receivers. A Unicast connection is from one transmitter to

one receiver. For example, if you send a mixer’s digital audio signal to several power amps, the signal would be Multicast. Unicast is most used on “switched” networks requiring more than 64 channels.

You specify a connection as Multicast or Unicast by the delivery address it you give it in System Architect. 255 and lower is Multicast (Broadcast); 256 and up is Unicast.

8.2.4 The Conductor

A CobraNet system is coordinated by one audio device in the network called the Conductor. It regulates the CobraNet digital audio trafﬁc on the CobraNet network. That is, the Conductor is the master clock for the rest of the network.

You choose one device to be the network conductor based on a prior ity scheme. The Conductor indicator will light on the CobraNet device that is serving as the conductor.

The Conductor handles time-division multiplexing and clock recovery on the network. The Conductor periodically broadcasts a well-deﬁned “beat” packet to all components to recover synchronous timing infor mation. The “beat” also speciﬁes which addresses can transmit at cer tain time slots within the “beat” period.

Each transmitting device is allowed to transmit in a given time-slot within the Conductor-controlled isochronous cycle time. The time-slot is determined by the assigned bundle priority. Higher bundle pri orities receive lower-numbered positions and are transmitted ﬁrst.

8.2.5 Repeater Networks

CobraNet can operate on repeater networks or switched networks. Repeater networks use low-cost Ethernet hubs. Switched networks use network switches.

Hubs send all data packets to all connected nodes. That is, all devices in the network receive data — even the Unicast data. Switches send speciﬁc packets to speciﬁc devices.

Up to 8 full-loaded Bundles (64 audio channels) are allowed on a repeater network. More Bundles may be allowed if they are loaded with less than the full eight audio channels.

Generally, a repeater-based CobraNet network must carry only CobraNet data to guarantee reliable transmission of audio pack ets. Use of repeater networks is not recommended.

8.2.6 Switched Networks

A more complex CobraNet network can be built using Ethernet switches. Switches do not simply broadcast each and every packet to all nodes. Instead, they check each incoming data packet to determine its destination and (very quickly) transmit the data to only that destination port. This allows for more network data ﬂow, more Bundles and more audio channels.

In effect, each network port in an audio component has 100MB of bandwidth. The network can be as large as 100MB times the number of ports on the network.

Another advantage of switched networks is “full-duplex” connec tions between components. A full-duplex link allows simulta neous send and receive over the same Ethernet connection.

In theory, each connection can simultaneously send and receive up to 64 channels per node, for a total of 128 channels. However, current CobraNet components can handle only 64 channels (32 in and 32 out).

Switches and full-duplex connections allow up to 128 channels per component, and greater than 3000 individual Unicast chan nels.

Switched networks also allow controllers (such as computers) to be on the same network as CobraNet devices.

Figure 8.3 A Star Network

page 34 page 35

Figure 8.4 A Multiple Star Network

Operation Manual

9 Service

CTs Multi-Channel Power Ampliﬁers

Crown ampliﬁers are quality units that rarely require ser vicing. Before returning your unit for service, please con tact Crown Technical Support to verify the need for servicing.

This unit has very sophisticated circuitry which should only be serviced by a fully trained technician. This is one reason why each unit bears the following label:

CAUTION: To prevent electric shock, do not remove covers. No user serviceable parts inside. Refer servicing to a qualiﬁed technician.

Complete the Crown Audio Factory Service Information form, in the back of this manual, when returning a Crown product to the factory or authorized service center. The form must be included with your product inside the box or in a packing slip envelope securely attached to the outside of the shipping carton. Do not send this form separately.

*Warranty is only valid within the United States of America. For information on Warranty outside of the U.S.A, please contact your local distributor.

9.1 International and Canada Service

Service may be obtained from an authorized service cen ter. (Contact your local Crown/Amcron representative or our ofﬁce for a list of authorized service centers.) To obtain service, simply present the bill of sale as proof of purchase along with the defective unit to an authorized service center. They will handle the necessary paperwork and repair.

Remember to transport your unit in the original factory pack.

9.2 US Service

Service may be obtained in one of two ways: from an authorized service center or from the factory. You may choose either. It is important that you have your copy of the bill of sale as your proof of purchase.

9.2.1 Service at a US Service Center

This method usually saves the most time and effort. Sim ply present your bill of sale along with the defective unit to an authorized service center to obtain service. They will handle the necessary paperwork and repair.

Remem ber to transport the unit in the original factory pack. A list of authorized service centers in your area can be obtained from Crown Factory Service, or online from http://www.crownaudio.com/support/servcent.htm.

9.2.2 Factory Service

Crown accepts no responsibility for non-serviceable product that is sent to us for factory repair. It is the owner’s responsibility to ensure that their product is ser viceable prior to sending it to the factory. Serviceable product list is available at http://crownweb.crownintl.com/crownrma/. For more information, please contact us direct.

A Service Return Authorization (SRA) is required for product being sent to the factory for repair. An SRA can be completed online at www.crownaudio.com/support/ factserv.htm. If you do not have access to the web, please call Crown’s Customer Service at 574.294.8200 or

800.342.6939 extension 8205. For warranty service, we will pay for ground shipping

both ways in the United States. Contact Crown Customer Service to obtain prepaid shipping labels prior to send ing the unit. Or, if you prefer, you may prepay the cost of shipping, and Crown will reimburse you. Send copies of the shipping receipts to Crown to receive reimbursement. Your repaired unit will be returned via UPS ground. Please contact us if other arrangements are required.

9.2.3 Factory Service Shipping Instructions:

1. Service Return Authorization (SRA) is required for product being sent to the factory for service. Please complete the SRA by going to www.crownaudio.com/support/factserv.htm. If you do not have access to our website, call

1.800.342.6939, extension 8205 and we’ll create the SRA for you.

2. See packing instructions that follow.

3. Ship product to: CROWN AUDIO FACTORY SERVICE 1718 W MISHAWKA RD. ELKHART, IN 46517

4. Use a bold black marker and write the SRA number on three sides of the box.

5. Record the SRA number for future reference. The SRA number can be used to check the repair status.

9.2.4 Packing Instructions

Important: These instructions must be followed. If they are not followed, Crown Audio, Inc. assumes no respon sibility for damaged goods and/or accessories that are sent with your unit.

1. Fill out and include the Crown Audio Factory Ser vice Information sheet in the back of this manual.

2. Do not ship any accessories (manuals, cords, hardware, etc.) with your unit. These items are not needed to service your product. We will not be responsibility for these items.

3. When shipping your Crown product, it is impor tant that it has adequate protection. We recommend you use the original pack material when returning the product for repair. If you do not have the original box, please call Crown at 800.342.6939 or

574.294.8210 and order new pack material. See instructions for “foam-in-place” shipping pack. (Do not ship your unit in a wood or metal cabinet.)

4. If you provide your own shipping pack, the mini mum recommended requirements for materials are as follows:

a. 275 P.S.I. burst test, Double-Wall carton that allows for 2-inch solid Styrofoam on all six sides of unit or 3 inches of plastic bubble wrap on all six sides of unit.

b. Securely seal the package with an adequate carton sealing tape.

c. Do not use light boxes or “peanuts”. Damage caused by poor packaging will not be covered under warranty.

Using your ‘foam-in-place’ shipping pack

Note: The foam-in-place packing is molded so that there is only one correct position for your product.

1. Open carton and lift center cushion leaving both end-cushions in place.

2. Carefully place your product with the product’s front panel facing the same direction as arrows indi cate.

3. Reset center cushion down over top of product’s chassis. The foam-in-place packing was molded to accommodate different chassis depth sizes. If your product’s chassis does not completely ﬁll the foamin-place cavity, you may use a soft but solid packing material (such as paper or bubble wrap) behind the chassis.

4. Enclose the completed Crown Audio Factory Ser vice Information form (or securely attach it to the outside of carton) and re-seal the shipping pack with a sturdy carton sealing tape.

9.2.5 Estimate Approval

Approval of estimate must be given within 30 days after being notiﬁed by Crown Audio Inc. Units still in the pos session of Crown after 30 days of the estimate will become the property of Crown Audio Inc.

9.2.6 Payment of Non-Warranty Repairs

Payment on out-of-warranty repairs must be received within 30 days of the repair date. Units unclaimed after 30 days become the property of Crown Audio Inc.

If you have any questions, please contact Crown Factory Service.

Crown Factory Service

1718 W. Mishawaka Rd.,

Elkhart, Indiana 46517 U.S.A.

Telephone:

574.294.8200

800.342.6939 (North America,

Puerto Rico, and Virgin Islands only)

Facsimile:

574.294.8301 (Technical Support)

574.294.8124 (Factory Service)

Internet:

http://www.crownaudio.com

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Operation Manual

CTs Multi-Channel Power Ampliﬁers

YEAR

CTs Multi-Channel Power Ampliﬁers

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10 Warranty

SUMMARY OF WARRANTY

Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUB SEQUENT OWNER of each NEW Crown product, for a period of ﬁve (5) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship. We further warrant the new Crown product regardless of the reason for failure, except as excluded in this War ranty.

*Warranty is only valid within the United States of America. For information on Warranty outside of the U.S.A, please contact your local distributor.

ITEMS EXCLUDED FROM THIS CROWN WARRANTY

This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product which has been damaged because of any inten tional misuse, accident, negligence, or loss which is covered under any of your insurance contracts. This Crown Warranty also does not extend to the new Crown product if the serial number has been defaced, altered, or removed.

WHAT THE WARRANTOR WILL DO

We will remedy any defect, regardless of the rea son for failure (except as excluded), by repair, replacement, or refund. We may not elect refund unless you agree, or unless we are unable to pro vide replacement, and repair is not practical or cannot be timely made. If a refund is elected, then you must make the defective or malfunctioning product available to us free and clear of all liens or

UNITED STATES & CANADA

other encumbrances. The refund will be equal to the actual purchase price, not including inter est, insurance, closing costs, and other ﬁnance charges less a reasonable depreciation on the product from the date of original purchase. War ranty work can only be performed at our autho rized service centers or at the factory. Warranty work for some products can only be performed at our factory. We will remedy the defect and ship the product from the service center or our factory within a reasonable time after receipt of the defec tive product at our authorized service center or our factory. All expenses in remedying the defect, including surface shipping costs in the United States, will be borne by us. (You must bear the expense of shipping the product between any for eign country and the port of entry in the United States including the return shipment, and all taxes, duties, and other customs fees for such for eign shipments.)

HOW TO OBTAIN WARRANTY SERVICE

You must notify us of your need for warranty ser vice within the warranty period. All components must be shipped in a factory pack, which, if needed, may be obtained from us free of charge. Corrective action will be taken within a reason able time of the date of receipt of the defective product by us or our authorized service center. If the repairs made by us or our authorized service center are not satisfactory, notify us or our autho rized service center immediately.

DISCLAIMER OF CONSEQUENTIAL AND INCIDENTAL DAMAGES

YOU ARE NOT ENTITLED TO RECOVER FROM US ANY INCIDENTAL DAMAGES RESULTING FROM

ANY DEFECT IN THE NEW CROWN PRODUCT. THIS INCLUDES ANY DAMAGE TO ANOTHER PRODUCT OR PRODUCTS RESULT ING FROM SUCH A DEFECT. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATIONS OF INCIDENTAL OR CONSEQUENTIAL DAM AGES, SO THE ABOVE LIMITATION OR EXCLU SION MAY NOT APPLY TO YOU.

WARRANTY ALTERATIONS

No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown War ranty is not extended by the length of time which you are deprived of the use of the new Crown product. Repairs and replacement parts provided under the terms of this Crown Warranty shall carry only the unexpired portion of this Crown Warranty.

DESIGN CHANGES

We reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured.

LEGAL REMEDIES OF PURCHASER

THIS CROWN WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE. No action to enforce this Crown Warranty shall be commenced after expiration of the warranty period.

THIS STATEMENT OF WARRANTY SUPERSEDES ANY OTHERS CONTAINED IN THIS MANUAL FOR CROWN PRODUCTS. 5/11

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Operation Manual

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CTs Multi-Channel Power Ampliﬁers

Online registration is also available at http://crownweb.crownintl.com/webregistration.

*Warranty is only valid within the United States of America. For information on Warranty outside of the U.S.A, please contact your local distributor.

When this form is used to register your product, it may be mailed or faxed.

Crown Audio, Inc. Fax: 574-294-8329 1718 W Mishawaka Rd Elkhart IN 46517

Please note that some information is required. Incomplete registrations will not be processed. * Indicates required information.

* First name: ______________________ Middle initial: _____ * Last name: ________________________________ Company: _________________________________________________________________________________

CUT ON THIS LINE

* Mailing address: ____________________________________________________________________________ * City: ____________________________* State: ___________________________* Zip Code: ________________ * Country: __________________________ E-mail address: ___________________________________________ * Phone # (include area code): ___________________________ Fax #: __________________________________

PRODUCT REGISTRATION

Crown Audio, Inc. 1718 W. Mishawaka Rd. Elkhart, IN 46517-9439 Phone: 574-294-8000 Fax: 574-294-8329 www.crownaudio.com

OWNER’S INFORMATION - PLEASE PRINT

PRODUCT INFORMATION

* MODEL * SERIAL # * PURCHASE DATE e.g. IT8000, CDi1000, PCC160 e.g. 8000000000 mo/day/yr ________________________________ ____________________ ______ /_____ /_____ ________________________________ ____________________ ______ /_____ /_____ ________________________________ ____________________ ______ /_____ /_____ ________________________________ ____________________ ______ /_____ /_____

Product purchased from: *(Business/Individual) ___________________________ Country: ________________________ Comments: ____________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________

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CTs Multi-Channel Power Ampliﬁers

Crown Audio Factory Service Information

Shipping Address: Crown Audio Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517

PLEASE PRINT CLEARLY

SRA #: __________________(If sending product to Crown factory service.) Model: _________________________________ Serial Number: _____________________ Purchase Date: ________________

PRODUCT RETURN INFORMATION

Individual or Business Name: ______________________________________________________________________________________________________________________________________________________ _____________________

Phone #: __________________________________________________ Fax #: ________________________________________ E-Mail: ___________________________________________________ ______

Street Address (please, no P.O. Boxes): _______________________________________________________________________________________________________________________________________________ ____________________________

City: __________________________________________ State/Prov: ________________________________ Postal Code: _________________ Country: _____________________

Nature of problem: _____________________________________________________________________________________________________________________________________________________________ ______________

___________________________________________________________________________________________________________________________________________________________________________

Other equipment in your system: ___________________________________________________________________________________________________________________________________________________ ________________________

If warranty is expired, please provide method of payment. Proof of purchase may be required to validate warranty.

PAYMENT OPTIONS

I have open account payment terms. Purchase order required. PO#____________________________________________________ θ COD

Credit Card (Information below is required; however if you do not want to provide this information at this time, we will contact you for the information when your unit is repaired).

Credit card information:

Type of credit card: θ Master Card θ Visa θ American Express θ Discover

Type of credit card account: θ Personal/Consumer θ Business/Corporate

Card # ______________________________________________ Exp. date: _____________ * Card ID #: __________________________

* Card ID # is located on the back of the card following the credit card #, in the signature area. On American Express, it may be located on the front of the card. This number is required to process the charge to your account. If you do not want to provide it at this time, we will call you to obtain this number when the repair of your unit is complete.

Name on credit card: ____________________________________________________________________________

Billing address of credit card: __________________________________________________________________________

__________________________________________________________________________

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Operation Manual

Crown CTs User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual