crown I-T5000 HD, I-T9000 HD, I-T12000 HD User Manual

Operation Manual

I-Tech HD Series

I-T5000 HD

I-T9000 HD

I-T12000 HD

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, IQ, BCA, and Amcron are registered trademarks of Crown International. HiQnet is a trademark of Harman International Industries, Inc. Other trademarks are the property of their respective owners.

Some models may be exported under the name Amcron.

140811-1 5/11

I-Tech HD Series Power Ampliers

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 manufacturer.

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

SPLASHING 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.

The I-Tech Series ampliﬁers are certiﬁed only at 120V in Canada.

IMPORTANT

I-Tech Series ampliﬁers require Class 2 output wiring. Les ampliﬁcateurs de série de I-Tech exigent des câbles de sortie de classe 2. I-Tech-Reihe-Verstärker verlangen Klasse die 2 Produktionsverdrahtung. Los ampliﬁcadores de la Serie I-Tech 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 ampliﬁers) 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.

page 2

Operation Manual

I-Tech HD Series Power Ampliers

Crown International, Inc.

ISSUED BY: Crown International, Inc.

1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A.

European Representative’s Name and Address:

David Budge 10 Harvest Close Yateley GU46 6YS United Kingdom

Equipment Type: Commercial Audio Power Ampliﬁers Family Name: I-Tech HD Model Names: I-T5000HD, I-T9000HD, I-T12000HD

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 61000-3-2:2005 and AMD1:2008 Limits for Harmonic Current Emissions (equipment input current less than or equal to 16 A per phase) EN 61000-3-3:2008 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current less than or equal to16A EN 55022:2006 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 61000-4-3:2006 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A) EN 61000-4-4:2007 Electrical Fast Transient/Burst Immunity (Criteria B) EN 61000-4-5:2006 Surge Immunity (Criteria B) EN 61000-4-6:2006 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A)

EN 61000-4-11:2004 Voltage Dips, Short Interruptions and Voltage Variation

DECLARATION of CONFORMITY

FOR COMPLIANCE QUESTIONS ONLY:

Sue Whitﬁeld 574-294-8289

Safety Standard: IEC 60065: 2001 7th Ed. and AMD 1: 2005 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

Andrew Stump Title: Director of Manufacturing

Operation Manual

Due to line current harmonics, we recommend that you contact your supply authority before connection.

Date of Issue: November 1, 2008

page 3

Table of Contents

I-Tech HD Series Power Ampliers

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

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

Table of Contents ...............................................................................4

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

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

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

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

2.1 Unpack and Install Your Ampliﬁer ..........................................6

2.2 Connecting to AC Mains ........................................................ 7

2.3 Wire Inputs and Outputs ......................................................... 7

3 Operation ........................................................11

3.1 Protecting Your Speakers ........................................................11

3.2 Startup Procedure .................................................................. 11

3.3 Precautions ............................................................................ 11

3.4 Front Panel Controls and Indicators ....................................... 12

3.5 Back Panel Controls, Indicators and Connectors .................... 13

4 Advanced Operation ............................................14

4.1 Advanced Operation Table of Contents ....................................14

4.2 Navigating the LCD Control Screen ......................................... 15

4.3 Presets ...................................................................................23

4.4 File Transfer Via the USB Port..................................................24

4.5 List of Pop-Up Boxes and Descriptions ................................... 25

4.6 Digital Audio Options (AES/EBU) ............................................ 26

4.7 Networking the Ampliﬁer .........................................................26

4.8 Software-Controllable Onboard DSP ..................................... 26

5 Troubleshooting .................................................39

6 Speciﬁcations ...................................................41

7 AC Power Draw and Thermal Dissipation ....................45

8 Advanced Features .............................................48

8.1 Protection Systems ................................................................ 48

8.2 Global, Switching Power Supply with PFC ............................. 48

8.3 3rd Generation Class I Circuitry .............................................. 48

8.4. Color-Coded Rear Overlay .................................................... 498

9 Appendix A: Network and CobraNet Basics ..................49

Appendix B: Setting Sensitivity for Best Gain Staging ......53

10 Service .......................................................... 54

11 Warranty ........................................................55

Product Registration .......................................................................... 57

Crown Factory Service Information Form .......................................... 59

page 4

Operation Manual

I-Tech HD Series Power Ampliers

I-T5000HD

2-ohm Dual (per ch.) 4-ohm Dual (per ch.) 8-ohm Dual (per ch.) 4-ohm Bridge 8-ohm Bridge

20 Hz - 20 kHz

Power

20 Hz - 20 kHz Power refers to guaranteed minimum power in watts with 0.35% THD.

4,000W

3,600W

1,800W 2,000W 1,250W

I-T12000HD

2-ohm Dual (per ch.) 4-ohm Dual (per ch.) 8-ohm Dual (per ch.) 4-ohm Bridge 8-ohm Bridge

20 Hz - 20 kHz

Power

20 Hz - 20 kHz Power refers to guaranteed minimum power in watts with 0.35% THD.

8,000W

7,000W

3,500W 4,000W 2,100W

I-T9000HD

2-ohm Dual (per ch.) 4-ohm Dual (per ch.) 8-ohm Dual (per ch.) 4-ohm Bridge 8-ohm Bridge

20 Hz - 20 kHz

Power

20 Hz - 20 kHz Power refers to guaranteed minimum power in watts with 0.35% THD.

6,000W

5,000W

2,500W 3,000W 1,500W

1 Welcome

Operation Manual

The Crown® I-Tech HD Series offers amazing power, light weight and ease of use for touring sound applications. Unlike other ampliﬁers, it includes onboard high-deﬁnition DSP, an LCD control screen, and a built-in network connection.

Modern power ampliﬁers are sophisticated pieces of engineering capable of producing extremely high power levels. They must be treated with respect and correctly installed if they are to provide the many years of reliable service for which they were designed.

In addition, I-Tech Series ampliﬁers include a number of features which require some expla nation before they can be used to their maxi mum advantage.

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

1.1 Features

• Global Power Supply with PFC (Power Fac tor

Correction) works anywhere in the world.

• High power density, up to 8000 watts in a 2U

chassis.

• Highest output voltage in the industry (200V

peak) provides clean transient peaks.

• 3rd-generation patented Class I (BCA®)

cir cuitry couples power efﬁciently to the load and provides low AC current draw.

• Onboard high-denition DSP with 24-bit,

192 kHz Cirrus Logic SHARC A/D and D/A converters. Advanced IIR ﬁlters and linearphase FIR ﬁlters.

• Pushbutton presets simplify setup. Custom

presets for various loudspeakers can be down loaded.

• AES/EBU digital audio input.

• EtherCon® Ethernet con nector for HiQnet™

control or CobraNet digital audio transport. This “Single Plug” connection allows HiQnet protocol and CobraNet digital audio through the same CAT 5 cable.

• Analog and digital thru connectors.

• LCD Control Screen is used to adjust the

ampliﬁer’s attenuation and muting, conﬁgure the amp, set up and view error monitoring, and recall DSP presets to reconﬁgure the amp for various applications.

• Comprehensive array of indicators provide

accurate diagnostics: Power, Data, along with Ready, Signal, Clip, Thermal and Fault for each channel.

• AC mains indicator in power switch glows

green when AC power is present.

• Front-panel USB connector accepts a USB

drive to transfer presets from the drive to the ampliﬁer DSP, and vice versa.

• Light weight due to aluminum chassis,

spe cial internal construction and switching power supply.

• Thermal management controller and two

dis crete thermal zones with variable-speed fans, forced-air cooling.

• Advanced protection circuitry guards against:

shorted outputs, DC, mismatched loads, general overheating, under/over volt age, highfrequency overloads and internal faults.

• Three-Year, No-Fault, Fully Transferable

Warranty completely protects your investment and guarantees its speciﬁcations.

1.2 How to Use This Manual

This manual provides you with the necessary information 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 condition. For addi tional information, please consult the online help in System Architect software, Crown’s Ampliﬁer Application Guide, I-Tech Application Guide (available online at www. crownaudio.com), Crown Technical Sup port, your system installer or retailer.

We strongly recommend you read all instruc tions, warnings and cautions contained in this manual. Also, for your protection, please send in your warranty registration card today. And save your bill of sale — it’s your ofﬁcial proof of purchase.

page 5

2 Setup

3.5 In.

8.9 cm

I-Tech HD Series Power Ampliers

2.1 Unpack and Install Your

Amplier

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

• Ethernet cables

• Rack for mounting amplier (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.

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.

MAGNETIC FIELD

CAUTION! Do not locate sensitive high-gain equipment such as preampliﬁers or tape decks 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 on the right side and right bottom of the ampliﬁer (facing the ampliﬁer).

If an equipment rack is used, we recommend locating sensitive equipment at least 20 cm (8 inches) away from the ampliﬁer.

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 or rear 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 a minimum of four inches (10.2 cm) from the ampliﬁer back panel.

Figure 2.2 illustrates standard ampliﬁer airﬂow.

page 6

19 In.

48.3 cm

16.2 In.

41.1 cm

Figure 2.1

Dimensions

Figure 2.2 Airow

1.5 In.

3.8 cm

Operation Manual

I-Tech HD Series Power Ampliers

2 Setup

2.2 Connecting to AC Mains

WARNING: The third (ground) prong of the supplied AC power cord connector is a required 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. You must operate your ampliﬁer from an AC mains power source with not more than a 10% variation above or a 15% variation below the ampliﬁer’s speciﬁed line voltage range and within the speciﬁed 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.

Packed with your I-Tech ampliﬁer is a clip that retains the power cord so it can’t pull out accidentally.

1. Locate the clip in a bag in the I-Tech packing carton.

2. Locate the IEC power connector on the back of the ampliﬁer. Above and below that connector are two slots. Stretch the ends of the clip and insert them into the slots (Figure 2.3).

3. Plug the power cord all the way into the ampliﬁer IEC power connector.

4. Pull the clip to the left and snap it onto the power cord.

2.3 Wire Inputs and Outputs

2.3.1 Wiring basics

• Always use shielded wire for input wiring. The higher the density of the

shield (the outer conductor) the better. Spiral wrapped shield is not recom mended.

• When using unbalanced lines keep the cables as short as possible. Avoid

lengths greater than 10 feet (3 meters).

• Do not run the audio input cables together with the high-level wiring such

as loudspeaker wires or AC cords. (This lessens the chance of hum and noise being induced into the input cables.)

• Turn the entire sound system off before changing any connections.

Crown is not liable for damage incurred when any transducer or compo nent is overdriven.

THE CHANNEL 2 INPUT IS IGNORED by default in Bridge Mono mode. It can be summed using the input source selector and used instead of Channel 1.

For additional information on audio input wiring please refer to the Crown Ampliﬁer Application Guide available online at www.crownaudio.com. It contains helpful information on preventing unwanted subsonic frequen cies, radio frequency interference, ground loops, and feedback oscillation.

When using network connections, pass the CAT 5 cable ﬁve times through a ferrite core (Figure 2.4), available from Crown Audio Inc. This is to ensure compliance with emission regulations.

Slot

Operation Manual

Slot

IEC Power Connector

Figure 2.3 IEC Power Connector Clip

Figure 2.4 Pass the CAT 5 Cable Five Times Through the Ferrite Core

Clip

page 7

2 Setup

2.3.2 Choose Input Wire and Connectors

Crown recommends using pre-built or professionally wired, bal anced line (two-conductor plus shield), 22-24 gauge cables and connectors. Use 3-pin male XLR connectors.

Unbalanced line may also be used but may result in noise over long cable runs.

Figure 2.5 shows connector pin assignments for balanced analog wiring or AES/EBU digital wiring. The use of standard analog cable with AES/EBU will result in diminished performance. For best results, 110 ohm shielded twisted-pair cable for AES/EBU signals is highly recommended. Figure 2.6 shows connector pin assignments for unbalanced analog wiring.

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

2.3.3 Choose Output Wire and Connectors

Crown recommends using pre-built or professionally wired, highquality, two- or four-conductor, heavy gauge speaker wire and connectors. Use Class 2 output wiring. You may use a 4-pole Speakon® connector (Figure 2.7) or banana plugs, spade lugs, or bare wire for your output connectors (Figure 2.8). To prevent the possibility of short circuits, wrap or otherwise insulate exposed loudspeaker cable connectors.

CAUTION – SHOCK HAZARD: Potentially lethal voltages exist at the output connectors when the ampliﬁer is turned on and is passing a signal.

Using the guidelines below, select the appropriate size of wire based on the distance from ampliﬁer to speaker.

Distance Wire Size

up to 25 ft. 16 AWG 26-40 ft. 14 AWG 41-60 ft. 12 AWG 61-100 ft. 10 AWG 101-150 ft. 8 AWG 151-250 ft. 6 AWG

CAUTION: Never use shielded cable for output wiring.

Figure 2.5 Balanced Analog Input Connector Wiring or AES/EBU Digital Connector Wiring

Figure 2.7 Left: Speakon Right: Speakon

Output Connector on Back Panel

Cable Connector

I-Tech HD Series Power Ampliers

Figure 2.6 Unbalanced Analog Input Connector Wiring

page 8

Figure 2.8

Binding Post Connections

Operation Manual

I-Tech HD Series Power Ampliers

Channel 1 Loudspeaker

Channel 2 Loudspeaker

Top Speakon (Channel 1)

Bottom Speakon (Channel 2)

Channel 1 Loudspeaker

Enceinte du Canal 1

Lautsprecher Kanal 1

Altoparlante del Canal 1

Channel 2 Loudspeaker

Enceinte du Canal 2

Lautsprecher Kanal 2

Altoparlante del Canal 2

2 Setup

2.3.4 Stereo Mode Wiring

Typical input and output wiring is shown in Figure 2.9.

IMPORTANT: Turn off the ampliﬁer and unplug its power cord.

INPUTS: Choose one of these options:

• Connect analog input wiring for both channels.

• Connect an AES/EBU digital signal to the AES/EBU connector.

OUTPUTS: Maintain proper polarity (+/–) on output connectors. Use Class 2 output wiring.

Figure 2.9 shows how to wire stereo speakers to the binding posts. Con nect Channel 1 loudspeaker’s positive (+) lead to Channel 1 positive (red) terminal of amp; repeat for negative (–). Repeat Channel 2 wiring as for Channel 1.

To wire stereo speakers to the Speakon methods:

Method 1 (Table 1 and Figure 2.10): Wire one Speakon® cable connector to two speakers. Insert the Speakon® cable connector into the ampliﬁer’s top Speakon® connector.

Method 2 (Table 2 and Figure 2.11): Plug the Channel 1 speaker into the Channel 1 (top) Speakon® connector, and plug the Channel 2 speaker into the Channel 2 (bottom) Speakon® connector.

connectors, use one of these

Figure 2.9

System Wiring,

Stereo Mode

Operation Manual

Table 1

Stereo Wiring Method 1: Use Top Speakon® Only

PIN 1+ 1– 2+ 2–

CH 1+ 1– 2+ 2–

Figure 2.10 Wiring Two Stereo Speakers

to the Top Speakon® Connector

Table 2

Stereo Wiring Method 2: Use Both Speakon®s

Top

PIN 1+ 1–

CH 1+ 1–

Bottom

PIN 1+ 1–

CH 2+ 2–

Figure 2.11 Stereo Wiring

Using Both

Speakon®

Connectors

page 9

2 Setup

2.3.5 Bridge-Mono Mode

Overview: Turn on the amp, enable Bridge-Mono mode using the LCD Control Screen, turn off the amp, wire it, and turn it back on.

1. Be sure that no cables are connected to the ampliﬁer. Turn on the front-panel power

switch. The LCD Control Screen will light up (Figure 2.12).

2. Under the LCD Control Screen, press the Menu/Exit button. Press the Next

button until you see OUTPUT MODE on the screen. If N/A is displayed, OUTPUT MODE is locked via software. If LOCKOUT is displayed, all the LCD screens are locked via software.

3. Press an Encoder knob to select BRIDGE MONO. Press the knob again to conﬁrm your choice. Press Menu/Exit. Turn down both level controls (Encoders) until you reach maximum attenuation.

4. IMPORTANT: Turn off the ampliﬁer and unplug its power cord.

INPUTS: There are three ways to connect an input signal to the ampliﬁer (Figure

2.13):

• Connect an analog signal source to the Channel-1 amplier input.

• Connect an AES/EBU digital signal source to the Digital Input IN connector.

NOTE: Crown provides a reference of wiring pin assignments for commonly used connector types in the Crown Ampliﬁer Application Guide available at www.crownaudio.com.

OUTPUTS: Use Class 2 output wiring. There are two ways to wire the ampliﬁer output connectors for Bridge-Mono mode:

1) Wire the speaker across the red binding post of each channel (Figure 2.14). Do not use the black binding posts when operating in Bridge-Mono mode.

2) Wire the speaker only to the top Speakon® connector as shown in Table 3 and Fig ure 2.14.

Figure 2.12 The LCD Control Screen

I-Tech HD Series Power Ampliers

Figure 2.13 Bridge-Mono Wiring to Binding Posts

page 10

Menu/Exit Prev Next

NOTE: In Bridge-Mono mode, the Channel 1 Level control sets the level; the Channel 2 Level control is defeated. All Channel-2 objects and controls are hidden and disabled.

Table 3

Top Speakon® Wiring for Bridge-Mono

PIN 1+ 2+

SPKR

+ –

Figure 2.14 Wiring a Speaker in Bridge-Mono Mode to the Top Speakon® Connector

Operation Manual

I-Tech HD Series Power Ampliers

3 Operation

3.1 Protecting Your Speakers

It’s wise to avoid clipping the ampliﬁer signal. Not only does clipping sound bad, it can damage high-frequency drivers. To prevent clipping, use System Architect software’s Level Max suite to enable or display the peak voltage limiter and average power limiter in your ampliﬁer’s built-in DSP. That way, no matter how strong a signal your mixer produces, the ampliﬁer output will not clip. Set the limiter threshold so that mixer signals above 0 dB or 0 VU on the mixer meters do not quite drive the ampliﬁer into clipping.

Also, avoid sending strong subsonic signals to the ampliﬁer. Highlevel, low-frequency signals from breath pops or dropped microphones can blow out drivers. To prevent subsonic signals, use one of these methods:

• Insert a highpass lter between mixer output and amplier input (or

between mixer and limiter).

• Use the I-Tech’s onboard DSP to set up a highpass lters.

• Switch in highpass lters at your mixer. Set the lter to as high a

fre quency as possible that does not affect your program. For example, try 35 Hz for music and 75 Hz for speech. On each mixer input channel, set the ﬁlter frequency just below the lowest fundamental frequency of that channel’s instrument.

3.2 Startup Procedure

When ﬁrst turning on your ampliﬁer, follow the procedures in the Quick-Start Guide on page 4 (stereo) or page 5 (bridge-mono).

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

For help with determining your system’s optimum gain structure (sig nal levels) please refer to the Crown Ampliﬁer Application Guide, available online at www.crownaudio.com.

3.3 Precautions

Your ampliﬁer is protected from internal and external faults, but you should still take the following 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 difﬁculties. For information on wiring and conﬁguration, please consult the Setup section of this manual or, for advanced setup techniques, consult Crown’s Ampliﬁer Application 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. Electrical shock may result.

5. Tampering with the circuitry, or making unauthorized circuit changes may be hazardous and invalidates all agency listings.

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 ampliﬁer. Such signals will be reproduced with extreme accuracy, and loudspeaker damage may result.

8. Do not operate the ampliﬁer with less than the rated load imped ance. Due to the ampliﬁer’s output protection, such a conﬁgura tion may result in premature clipping and speaker damage.

9. CAUTION – SHOCK HAZARD: Potentially lethal voltages exist at the output connectors when the ampliﬁer is turned on and is passing a signal.

Remember: Crown is not liable for damage that results from overdriv ing other system components.

Operation Manual

page 11

3 Operation

I-Tech HD Series Power Ampliers

3.4 Front Panel Controls and Indicators

Many of these functions can be disabled using Blackout Mode (a selection in the Advanced Menu, Section 4.2.3).

A. Cooling Vents

Front-to-rear forced airﬂow through foam dust ﬁlter

B. LCD Control Screen

Integrated LCD with white backlight, controls ampli ﬁer setup and operation.

The LCD Control Screen and its controls let the user

adjust the ampliﬁer’s attenuation and muting, con ﬁgure the amp, set up and view error monitoring (such as temperature and load supervision), and recall DSP presets. The presets allow the user to quickly reconﬁgure the amp for various applica tions.

C. Power Switch

Push-on/push-off switch glows green when AC power is present at the power cord and the ampliﬁer circuit breaker is in the “on” position.

D. USB 2.0 Connector

Accepts a USB drive to transfer presets from the drive to the ampliﬁer DSP, and vice versa.

E. Fault Indicator

Red LED, one per channel, ﬂashes when the ampli ﬁer output channel has stopped operating. Usually this means that the ampliﬁer must be serviced.

F. Thermal Indicator

Red LED, one per channel, illuminates when the channel has shut down due to thermal stress or overload.

G. Clip Indicator

Red LED, one per channel, illuminates when the channel’s output signal reaches the onset of audible clipping. The Clip Indicator also will illuminate dur ing Thermal Level Control (TLC) limiting. The Clip Indicator can be turned of during Blackout mode.

H. Level Controls (Encoders)

Speed-sensitive, 0.5 dB steps, range 0 to –100 dB. These two knobs affect the Channel-1 and Channel-2 output levels. They also select Menu items and adjust parameter values that are displayed on the LCD control screen.

I. Menu/Exit Button

“Menu” enters the main menu. “Exit” leaves the menu.

J. Prev Button

Selects the previous item in the menu.

K. Next Button

Selects the next item in the menu.

L. Signal Indicators

These can be disabled during Blackout mode. Three green LEDS per channel indicate the ampli ﬁer’s input and output signal levels. From top to bot tom the LEDs are

–10 dB: ampliﬁer output is 10 dB below clipping. –20 dB: ampliﬁer output is 20 dB below clipping. Signal: selected input signal is above –40 dBu.

M. Ready Indicator

Green LED, one per channel, illuminates when the channel is initialized and ready to produce audio out put. Indicator is off when the channel is set to standby mode via System Architect or in Blackout mode.

N. Power Indicator

Blue LED indicates ampliﬁer has been turned on and AC power is available. The LED will ﬂash when the AC line voltage is 15% above or below the nominal rated range. This indicator can be turned off in Blackout mode.

O. Data Indicator

Yellow LED indicates network data activity. Data indicator ﬂashes only when the ampliﬁer is polled for data, or is polled to see whether it is online. This indicator can be turned off in Blackout mode.

P Bridge Mode Indicator

Yellow LED illuminates when the ampliﬁer is set to Bridge-Mono mode.

page 12

Figure 3.1 Front Panel Controls and Indicators

Operation Manual

I-Tech HD Series Power Ampliers

3 Operation

3.5 Back Panel Controls, Indica tors and Connectors

A. Fans

Provide front-to-back forced airﬂow for cooling.

ANALOG INPUTS SECTION B. Balanced Analog XLR Inputs

A 3-pin female XLR connector for each channel.

C. Balanced Analog XLR Loop-Through Outputs

Two 3-pin male XLR output connectors are pro vided (one per channel). The signal at these connectors is paralleled with the input signal for feeding the input signal to other ampliﬁers.

OUTPUTS SECTION D. 4-Pole Speakon® Output Connectors

Two high-current, 50A Neutrik® Speakon® NL4MLP (mates with NL4FC and NL4), one per channel. Class 2 output wiring required.

These two connectors accept 2-pole or 4-pole Speakon® connectors. See Figures 2.5 through

2.10 and Tables 1, 2 and 3 for connector wiring. The top Speakon® connector is wired for both channels so it can be used for bridge-mono wiring or for stereo wiring of two speakers to a single Speakon® connector.

E. Binding Post Output Jacks

One pair per channel of high-current, 60A colorcoded binding posts. Accepts banana plugs, wire or spade lugs.

F. Power Cord Connector

Standard 20 amp IEC inlet. Voltage range is indicated above IEC inlet.

G. Reset Switch/Circuit Breaker If the current draw of the ampliﬁer exceeds safe limits, this breaker automatically disconnects the power supply from the AC mains. The switch resets the circuit breaker.

H. MAC Address This speciﬁc ampliﬁer’s network identiﬁer that is burned into its ﬁrmware.

I. Preset Indicator

LED ﬂashes to signal the number of the current preset if active. LED is green if the preset values have not been changed once loaded. LED is yellow if the preset values have been changed since they were loaded.

J. Reset Button To restore factory default settings: Press the Reset Button with a thin, non-conductive object, then turn on ampliﬁer power, and continue to hold the reset button until the Preset light comes on green (approximately 16 seconds)..

K. Data Indicator

Flashes yellow only when the ampliﬁer is polled for data, or is polled to see whether it is online.

DIGITAL INPUTS SECTION L. AES/EBU Digital Input

This 3-pin female XLR connector accepts a dig ital signal in the AES/EBU format.

M AES/EBU Digital Loop-through Output Male XLR active/re-clocked AES/EBU digital loop-through. The signal at this connector duplicates the digital input signal for feeding the input signal to other ampliﬁers.

It is not recommended to loop through more than four ampliﬁers. If larger distribution of AES is needed, the use of an AES distribution ampli ﬁer is recommended.

NETWORKING SECTION N. Link/Act Indicator

Shows net work activity.The LINK ACT LED illuminates when the network port is connected and ﬂashes when network activity is detected.

O. Network Connector

This EtherCon® Ethernet connector is for networking. Warning: Only connect to networks that remain inside the building.

P. Cond Indicator Turns on if the ampliﬁer is set to be the CobraNet conductor. The CobraNet conductor is a CobraNet node that provides the master timing clock for the CobraNet digital audio transport network.

Operation Manual

Figure 3.2 Back Panel Controls and Connectors

page 13

4 Advanced Operation

I-Tech HD Series Power Ampliers

4.1 Advanced Operation Table of Contents.......14

4.2 Navigating the LCD Control Screen ................... 15

4.2.1 Introduction ...................................................................15

4.2.2 Basic Selections ............................................................16

4.2.3 Advanced Menu .............................................................17

4.2.4 Monitor Menu ...............................................................20

4.2.5 Alert Menu .....................................................................20

4.2.6 Networking Menu ..........................................................21

4.2.7 CobraNet Menu .............................................................22

4.3 Presets .................................................... 23

4.3.1 Introduction ...................................................................23

4.3.2 User Presets ..................................................................23

4.3.3 Downloadable Presets ...................................................23

4.4 File Transfer Via the USB Port ......................... 24

4.5 List of Pop-Up Boxes and Descriptions ............... 25

4.6 Digital Audio Options (AES/EBU) ...................... 26

4.7 Networking the Ampliﬁer ............................... 26

4.7.1 NetworkTroubleshooter ...................................................26

4.8 Software-Controllable Onboard DSP ................. 26

4.8.1 Ampliﬁer DSP Selection Screen .....................................27

4.8.2 Ampliﬁer Mode .............................................................27

4.8.3 Levels and Indicators .....................................................27

4.8.4 Input Signal Router ........................................................28

4.8.5 Source Conﬁguration ....................................................29

4.8.6 CobraNet Advanced Settings .........................................29

4.8.7 Input Signal Compressor ..............................................30

4.8.8 Input Delay and Driver Delay ..........................................30

4.8.9 Input EQ and Output EQ .................................................31

4.8.10 Crossover Filters .........................................................32

4.8.11 LevelMax Suite ...........................................................33

4.8.12 Front Panel Security ....................................................33

4.8.13 Ampliﬁer Settings .......................................................34

4.8.14 Ampliﬁer Information ..................................................35

4.8.15 Apply to Others ...........................................................35

4.8.16 Delay (Latency) ...........................................................35

4.8.17 Preset Manager ...........................................................36

4.8.18 Signal Generator ..........................................................37

4.8.19 Fixed-Gain Mode in the I-Tech HD ...............................38

page 14

Operation Manual

I-Tech HD Series Power Ampliers

MENU TREE

4 Advanced Operation

4.2 Navigating the LCD Control Screen

4.2.1 Introduction

The LCD Control Screen and its controls let you conﬁgure the ampli ﬁer and access many features that before were available only through a remote computer. Also, you can recall DSP presets via the front panel. (Some DSP parameters cannot be adjusted with the LCD Control Screen. That is done in System Architect.)

Figure 4.1 shows the parts of the LCD Control Screen. Its functions are described below. NOTE: Listed functions can also be controlled in System Architect.

Figure 4.1 Parts of the LCD Control Screen

Here’s how to access the various menus and settings in the LCD control screen:

• Starting from the Attenuation screen, press Menu/Exit to go to the Sample Rate screen.

• Press Next to go to the next item in the menu.

• Press Prev to go to the previous item in the menu.

• Turn or press either Encoder knob to change the value of the

dis played parameter.

• When you see a menu screen, push the knob once to see the

items in that menu. Or press Next to go to the next menu.

• Press Menu/Exit to leave the menu and return to the Attenuation screen at any time. Some menu items require conﬁrmation: after you request a change, the display might say “Press and hold.” To conﬁrm a change, press and hold an Encoder knob. If you don’t want the change to occur during a conﬁrmation, turn the knob or wait ﬁve seconds.

The entire front panel or just selected screens can be locked out or set to read only status using System Architect software. Locked-out screens will either say “Lockout” or the individual parameter will say “N/A”. If a change is attempted the screen will say “Changes Disabled”.

Operation Manual

Attenuation - Mute - Lockout

Menu button

Sample Rate

Analog Input Sensitivity Presets Amp Mode Locate

ADVANCED MENU

(press knob once to access these items:) Attenuator Limits Attenuator Link Input Sources Analog Source Select Maximum Analog Input Digital Source Select AES Source Select AES Input Trim AES Input Status Cobranet Source Select Cobranet Input Trim Bandpass Gain

Exit

Output Polarity Input Delay Speaker Delay LED Meter Display Type Bar Meter Display Type LevelMax Peak Voltage Limiter RMS Voltage Limiter Transducer Thermal Limiter Pink Noise Generator SLM (Sweep Load Monitoring) Front Panel Blackout

Sweep Load Monitoring is not available in early I-Tech HD models.

ALL MENUS: Next/Previous loops

Prev to

Cobranet Menu

Level Max Suite

MONITOR MENU

(press knob once to access these items:) Load Monitoring

Thermal % Thermal Temp deg. C AC Line Voltage Operating Time Watts Output

Exit

NETWORKING MENU

(press knob once to access these items:) Network Info Manufacturing Info HiQnet Node Address DHCP IP Address Subnet Mask

Exit

Figure 4.2 The Menu Tree

Menu Tree

As a handy reference, Figure 4.2 shows the menu structure of the LCD control screen. Starting from any Menu screen, press an Encoder knob to go to the ﬁrst selection in the Menu. You can loop through a menu’s selections using the Next and Prev buttons. The Menu/Exit button returns you to the Attenuation screen which you see on power-up.

ALERT MENU

(press knob once to access these items:) Amp Output Clip Errors Analog Input Clip Errors Thermal Errors Low Limit Load Errors High Limit Load Errors SLM Errors

Exit

Line Voltage Errors Fan Errors Clear All Error Logs

COBRANET MENU

(press knob once to access these items:) Cobranet Information Ch1 Cobranet Rx Ch2 Cobranet Rx Cobranet Tx Cobranet Conductor Priority Cobranet Transport Latency

Exit

To Sample Rate

page 15

4 Advanced Operation

I-Tech HD Series Power Ampliers

Operation Examples

Operation Example 1 How to set the CH1 input sensitivity using the LCD Control Screen:

1. After power-up, when the Attenuation screen appears, press

Menu/Exit.

2. Press Next.

3. Turn the left Encoder to set the sensitivity. NOTE: If you do not see the sensitivity you want, try changing the Maximum Analog Input level (see below).

4. Press Menu/Exit.

Operation Example 2

How to set the Maximum Analog Input level using the LCD Control Screen:

1. After power-up, when the Attenuation screen appears, press

Menu/Exit.

2. Press Next until you see “Advanced Menu.”

3. Push an Encoder knob.

4. Press Next until you see “Maximum Analog Input.”

5. Turn an Encoder to change the maximum analog input level. Press an Encoder to conﬁrm and save your setting.

6. Press Menu/Exit.

Operation Example 3

How to monitor the Thermal Errors using the LCD Control Screen:

1. After power-up, when the Attenuation screen appears, press Menu/Exit.

2. Press Prev until you see “Alert Menu.”

3. Push an Encoder knob.

4. Press Next until you see “Thermal Errors.

4.2.2 Basic Selections

Opening Screen: On power-up, the LCD Control Screen dis plays the Crown logo. After a few seconds, the ﬁrmware version appears, then the Attenuation screen appears.

(Power On) 1.0.0.5

Attenuation and Bar Meters

This screen dis plays the attenuation in dB and on bar meters. To change the atten uation in either channel, turn the Encoder. Attenuation changes

0.5 dB per detent when you turn the Encoder slowly, and more when you turn the Encoder quickly. The current preset name is displayed in the upper-right corner. The (M) is explained on the next page under Presets.

Attenuation Default (M)

-30.0

Mute/Unmute (in the Attenuation screen)

• To mute either channel: Press and hold an Encoder knob for 1 second. The display will alternate between MUTE and the attenua tion level. While the ampliﬁer is muted, you can adjust attenuation for each channel by turning an Encoder knob.

• To unmute either channel: Press and hold an Encoder knob again for 1 second.

Attenuation Default (M)

-30.0

Front Panel Lockout (in the Attenuation screen) The ampliﬁer’s administrator can control access to menu mode and the ampliﬁer’s attenuators. This lockout can be done either by the front panel buttons or by System Architect software.

To lock or unlock the menu with the front-panel buttons: press Next and Prev simultaneously. To lock or unlock the menu with System Architect software: go to the Tools Menu > Display Screen Security and press the lockout button. If a speciﬁc parameter is protected, the screen says “N/A” or “Change Disabled.”

If the lockout is done from the software, the user can disable the lockout only in the software, not by pressing the front-panel but tons.

If the menu is locked and you press any button or turn an Encoder, the word “LOCKOUT” is displayed. If a speciﬁc parameter is protected, the screen says “N/A” or “Change Disabled.”

MUTE

Now let’s look at the function of each menu selection.

page 16

Operation Manual

I-Tech HD Series Power Ampliers

Presets Preset7 (M)

4 Advanced Operation

Sample Rate: Starting from the Attenuation screen, press Menu/Exit to go to the Sample Rate screen. The sample rate of the ampliﬁer’s DSP is displayed. It can be modiﬁed only in System Architect software because all of the FIR ﬁlter settings will need to be recalculated as a result of the change. Please refer to its Help ﬁles. When you route a Cobranet input, the sample rate displayed here must match the Cobranet source.

Sample Rate

96 kHz

Modify in software ONLY!

Analog Input Sensitivity: Turn the left Encoder knob to change the Ch. 1 input sensitivity; turn the right Encoder knob to change the Ch. 2 input sensitivity. This screen also displays the amp gain for each channel resulting from the sensitivity settings. See Figure 4.4.

Note: If you do not see the sensitivity you need, try changing the Maximum Analog Input level in the Advanced Menu (described later). This makes different sensitivities available.

To optimize the system gain structure, see Section 3.1 in the I-Tech application Guide at www.crownaudio.com/itech/pdf/137327.pdf.

Analog Input Sensitivity

2.90

31.5

Vrms

dB Gain

31.5

Presets: A preset is a group of DSP and ampliﬁer settings for a particular speaker system. Turn an Encoder to view Presets 1 through 50. To recall a preset, press the Encoder, then press and hold the Encoder to conﬁrm. For more information on presets, see Section 4.3.

The preset currently in use is displayed in the upper right corner. (A) Active means that the ampliﬁer is operating exactly according to that preset. (M) Modiﬁed means that the ampliﬁer is operating according to the preset but with some settings changed. If a preset number is ﬂashing, it is not in use.

In the example shown below,

• Preset 7 is in use (it’s in the upper right corner).

• The amplier settings have been modied (M) since Preset 7 was loaded.

• The large “7” is not ashing, which means that Preset 7 is in use.

Preset7 CH1:MF-1&2

CH2:MF-3&4

In the example shown below, you turned down an Encoder knob two notches after load ing Preset 7.

• Preset 7 is in use (it’s in the upper right corner).

• Preset 7 is active (A). That means the amplier is operating exactly according

to that preset.

• The large “ 5” is ashing because Preset 5 is not in use.

• Preset 5’s Channel-1 label is “LF–1&2.”

• Preset 5’s Channel-2 label is “LF–3&4.”

Presets Preset 7(A)

Preset7 CH1:LF-1&2

CH2:LF-3&4

Amp Mode: This screen lets you set up the ampliﬁer for Dual, Input Y or Bridge Mono mode. Turn an Encoder knob to choose among those three options, then press the knob to save your choice. You will be prompted to conﬁrm your choice. The LCD screen displays the currently selected mode.

In Dual (or Stereo) mode, both channels operate independently. In Bridge Mono mode, both channels are summed to double the power, and the ampliﬁer puts out a mono signal. In Input Y mode, Channel 1’s input signal feeds both channels, and each channel can be set to a different output level, usually for bi-amp operation.

Amp Mode

<Dual>

Turn to Set-Press to Save

Locate: Allows users to identify a speciﬁc ampliﬁer in a large network of ampliﬁers without having to compare address infor mation. Locate can be turned on/off from software and/or the front panel. Press an Encoder knob to turn on the Locate function. When on, the LCD screen ﬂashes. Press the knob again to turn off the Locate function. In System Architect, the device icon has a blue outline to indicate that it is in Locate mode.

Locate

OFF

Press enc to toggle

4.2.3 ADVANCED MENU

When you see this screen, press an Encoder knob to access the selections in the Advanced Menu, described next. To get to the Advanced Menu screen from the Attenuation screen, press Menu/Exit twice, then press Next ﬁve times.

Operation Manual

Advanced Menu

Push knob for adv. menu

page 17

4 Advanced Operation

I-Tech HD Series Power Ampliers

Attenuator Limits: You can set the maximum attenuation from 0 dB to –100 dB. This feature allows you to set a limit on the attenua tors. Once set, attenuation cannot be adjusted beyond this level. The attenuator limit appears as a line in the attenuator bar meter.

NOTE: The attenuator setting must be below the attenuator limit that you are trying to set. For example, if the attenuator is set at –3 dB, you cannot set the attenuator limit below –3 dB unless you decrease the attenuator level.

Attenuator Limits

0.0

Attenuator Link You can set the attenudators to be independent or linked. Turn an Encoder knob to choose one of those options, then press the knob to save your choice.

Attenuator Link

INDEPENDENT

Turn to Set-Press to Save

Input Sources: For each channel, turn the Encoder to select ana log, digital, or automatic backup source. Options are: Analog Digital Digital with analog backup <Digital A-Backup> Digital with analog override <Digital A-Ovride>

Digital with analog backup: The I-Tech HD is being fed a digital signal and an analog signal. The input is currently switched to the digital signal. If it fails, the I-Tech HD switches instantly to the analog signal.

Digital with analog override: The input is switched to the digital sig nal, and no analog signal is applied. If an analog signal is sent, the I-Tech HD switches instantly to the analog signal. If the analog signal fails, the I-Tech HD switches to the digital signal after a delay set by the Hold Time slider in the Input Section of the System Architect page.

Input Sources

0.0

Analog Source Select: Turn the left Encoder knob to select Analog 1, Analog 2, or Analog 1+2 signals for Channel 1. The right Encoder does the same for Channel 2. Press the knob to conﬁrm your selection. Analog 1 is Analog input Channel 1. Anolog 2 is Analog input Channel 2. Analog 1 +2 is Analog input Channels 1 and 2.

Analog Source Select

Analog Analog

1 2

Maximum Analog Input: Turn an Encoder to select the maximum input level to the ampliﬁer: +21 dBu or +15 dBu. Press the knob to conﬁrm your selection. Note: Changing this value changes the range of sensitivities available to the ampliﬁer.

For more information see Figure 4.4 and the I-Tech Sensitivity Charts in the Appendix of the I-Tech Application Guide. It is available online at www. crownaudio.com/itech/pdf/137327.pdf.

Maximum Analog Input

Turn to Set-Press to Save

+15dBu

Digital Source Select: Turn the left Encoder knob to select the digital source for Channel 1: AES or Cobranet. The right Encoder does the same for Channel

2. Press the knob to conﬁrm your choice.

Digital Source Select

AES

AES Source Select: Turn the left Encoder knob to select the digital source for Channel 1: AES1, AES2, or AES1+2. The right Encoder does the same for Channel 2. Press the knob to conﬁrm your choice. AES 1 is AES input Channel 1. AES 2 is AES input Channel 2. AES 1 +2 is AES input Channels 1 and 2.

<Cobra

net>

AES Input Trim: Turn the left Encoder knob to vary the gain of the AES digital signal for Channel 1: -100.0 dB to +20 dB. The right Encoder does the same for Channel 2. See Figure 4.4 for more information.

AES Input Trim

0.0

AES Input Status: “Lock” indicates that an AES cable is plugged in and the ampliﬁer is receiving (and locking to) the AES clock pulse. “No Lock” means that the ampliﬁer is not receiving, or is not locking to the AES clock pulse.

AES Input Status

No Lock

CobraNet Source Select: Turn the left Encoder knob to select the CobraNet source for Channel 1: Cnet1, Cnet2, or Cnet 1+2. The right Encoder does the same for Channel 2. Press the knob to conﬁrm your choice. Cnet1 is Bundle A. Cnet2 is Bundle B. Cnet 1+2 is Bundles A+B.

Cobranet Source Select

Cnet 1

CobraNet Input Trim: Turn the left Encoder knob to vary the gain of the CobraNet digital signal for Channel 1: -100.0 dB to +20 dB. The right Encoder does the same for Channel 2. See Figure 4.4 for more information.

Cobranet Input Trim

0.0

Cnet 2

0.0

page 18

AES Source Select

AES

Operation Manual

+ 42 hidden pages