Crown Audio I-T12000 HD Stereo Amplifier Operation Manual

I-Tech HD Series

PRELIMINARY

Operation Manual

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.

®

©2008 by Crown Audio ® Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000

I-T5000 HD

I-T9000 HD

I-T12000 HD

140811-1

12/08

I-Tech HD Series Power Amplifi ers

Important Safety Instructions

Importantes Instructions de Sécurité

Wichtige Sicherheitsinstruktionen

Instrucciones de Seguridad Importantes

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 amplifi ers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If the provided plug does not fi t 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 specifi ed by the manufacturer.

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

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

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

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 CALIFI-

CADO.

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’ALI-

MENTATION DE SON RÉCEPTACLE. LA PRISE D’ALIMEN TATION

RESTERA AISÉMENT FONCTIONNELLE.

PARA DESCONECTAR COMPLETAMENTE EL EQUIPO DEL

SUMINSTRO ELECTRICO, DESCONECTE EL CABLE DE ALI-

MENTACION 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 amplifi ers are certifi ed only at 120V in Canada.

IMPORTANT

I-Tech Series amplifi ers require Class 2 output wiring.

Les amplifi cateurs de série de I-Tech exigent des câbles de sortie de classe 2.

I-Tech-Reihe-Verstärker verlangen Klasse die 2 Produktionsverdrahtung.

Los amplifi cadores 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 preamplifi ers directly above or below the unit. Because this amplifi er has a high power density, it has a strong magnetic fi eld which can induce hum into unshielded devices that are located nearby. The fi eld is strongest just above and below the unit.

If an equipment rack is used, we recommend locating the amplifi ers) in the bottom of the rack and the preamplifi er 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 modifi cations 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


Crown International, Inc.

DECLARATION of CONFORMITY

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

FOR COMPLIANCE QUESTIONS ONLY:

Equipment Type: Commercial Audio Power Amplifi ers

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

Sue Whitfi eld

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 identifi ed 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

Date of Issue: November 1, 2008

Title: Senior Vice President of Manufacturing


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

page 3

Table of Contents

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 Amplifi er .......................................... 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 Amplifi er ......................................................... 26

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

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

6 Specifi cations ...................................................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



I-T5000HD

20 Hz - 20 kHz

Power

2-ohm Dual (per ch.)

1,800W


2,000W


1,250W

4-ohm Bridge

8-ohm Bridge

3,600W

4,000W

20 Hz - 20 kHz Power refers to guaranteed

minimum power in watts with 0.35% THD.

I-T9000HD

20 Hz - 20 kHz

Power


2,500W


3,000W


1,500W

4-ohm Bridge

8-ohm Bridge

5,000W

6,000W



I-T12000HD

20 Hz - 20 kHz

Power


3,500W


4,000W


2,100W

4-ohm Bridge

8-ohm Bridge

7,000W

8,000W




1 Welcome

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

Modern power amplifi ers 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 amplifi ers 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 amplifi er.

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 effi ciently to the load and provides low AC current draw.

• Onboard high-defi nition DSP with 24-bit,

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

• 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 amplifi er’s attenuation and muting, confi gure the amp, set up and view error monitoring, and recall DSP presets to reconfi gure 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 amplifi er 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 specifi cations.

1.2 How to Use This Manual

This manual provides you with the necessary information to safely and correctly setup and operate your amplifi er. 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 Amplifi er 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 offi cial proof of purchase.

page 5

2 Setup

page 6

2.1 Unpack and Install Your

Amplifi er

Please unpack and inspect your amplifi er 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 amplifi er (or a stable surface for stacking)

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

CAUTION: Before you begin, make sure your amplifi er 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 fi er dimensions.

You may also stack amps without using a cabinet.

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

MAGNETIC FIELD

CAUTION! Do not locate sensitive high-gain equipment such as preamplifi ers or tape decks directly above or below the unit. Because this amplifi er has a high power density, it has a strong magnetic fi eld which can induce hum into unshielded devices that are located nearby.

The fi eld is strongest on the right side and right bottom of the amplifi er (facing the amplifi er).

If an equipment rack is used, we recommend locating sensitive equipment at least 20 cm

(8 inches) away from the amplifi er.

3.5 In.

8.9 cm

19 In.

48.3 cm

1.5 In.

3.8 cm

16.2 In.

41.1 cm

Figure 2.1

Dimensions


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 amplifi er sides, and the back of the rack should be a minimum of four inches

(10.2 cm) from the amplifi er back panel.

Figure 2.2 illustrates standard amplifi er airfl ow.

Figure 2.2 Airfl ow



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.

Amplifi ers don’t create energy. The AC mains voltage and current must be suffi cient to deliver the power you expect. You must operate your amplifi er from an AC mains power source with not more than a 10% variation above or a 15% variation below the amplifi er’s specifi ed line voltage range and within the specifi ed frequency requirements (indicated on the amplifi er’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 amplifi er 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 amplifi er. 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 amplifi er IEC power connector.

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

Slot


Slot

IEC Power Connector

Clip

Figure 2.3 IEC Power Connector Clip

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

Amplifi er 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 fi ve times through a ferrite core (Figure 2.4), available from Crown Audio Inc. This is to ensure compliance with emission regulations.

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

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 qualifi ed 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 amplifi er is turned on and is passing a signal.

Using the guidelines below, select the appropriate size of wire based on the distance from amplifi er 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 2.6 Unbalanced Analog Input Connector Wiring

Figure 2.7

Left: Speakon

®

Right: Speakon

Output Connector on Back Panel

®

Cable Connector

page 8

Figure 2.8

Binding Post Connections



2 Setup

2.3.4 Stereo Mode Wiring

Typical input and output wiring is shown in Figure 2.9.

IMPORTANT: Turn off the amplifi er 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

® connectors, use one of these methods:

Method 1 (Table 1 and Figure 2.10): Wire one Speakon

®

cable connector to two speakers. Insert the Speakon

®

cable connector into the amplifi er’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.

Table 1

Stereo Wiring Method 1: Use Top Speakon

®

Only

PIN 1+ 1– 2+ 2–

CH 1+ 1– 2+ 2–

Channel 1

Loudspeaker

Enceinte du

Canal 1

Lautsprecher

Kanal 1

Altoparlante del Canal 1

Figure 2.10 Wiring Two Stereo Speakers to the Top Speakon

®

Connector

Channel 2

Loudspeaker

Enceinte du

Canal 2

Lautsprecher

Kanal 2

Altoparlante del Canal 2


Figure 2.9

System Wiring,

Stereo Mode

Top

Table 2

Stereo Wiring Method 2: Use Both Speakon

® s

PIN 1+

CH 1+

1–

1–

Channel 1

Loudspeaker

Bottom

PIN 1+

CH 2+

1–

2–

Bottom

Speakon

(Channel 2)

Top Speakon

(Channel 1)

Figure 2.11

Stereo Wiring

Using Both

Speakon

®

Connectors

Channel 2

Loudspeaker

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 amplifi er. 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 confi rm your choice. Press Menu/Exit. Turn down both level controls (Encoders) until you reach maximum attenuation.

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

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

2.13):

• Connect an analog signal source to the Channel-1 amplifi 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 Amplifi er Application Guide available at www.crownaudio.com.

OUTPUTS: Use Class 2 output wiring. There are two ways to wire the amplifi er 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

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.

Figure 2.13 Bridge-Mono Wiring to Binding Posts

Table 3

Top Speakon

®

Wiring for Bridge-Mono

PIN

SPKR

1+

+

2+

–

page 10

Figure 2.14

Wiring a Speaker in Bridge-Mono Mode to the Top Speakon

®

Connector



3 Operation

3.1 Protecting Your Speakers

It’s wise to avoid clipping the amplifi er 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 amplifi er’s built-in DSP. That way, no matter how strong a signal your mixer produces, the amplifi er 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 amplifi er into clipping.

Also, avoid sending strong subsonic signals to the amplifi er. 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 fi lter between mixer output and amplifi er input (or between mixer and limiter).

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

• Switch in highpass fi lters at your mixer. Set the fi 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 fi lter frequency just below the lowest fundamental frequency of that channel’s instrument.

3.2 Startup Procedure

When fi rst turning on your amplifi er, 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 Amplifi er Application Guide, available online at www.crownaudio.com.

3.3 Precautions

Your amplifi er is protected from internal and external faults, but you should still take the following precautions for optimum performance and safety:

1. Before use, your amplifi er fi rst must be confi gured for proper operation, including input and output wiring hookup. Improper wiring can result in serious operating diffi culties. For information on wiring and confi guration, please consult the Setup section of this manual or, for advanced setup techniques, consult Crown’s

Amplifi er 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 amplifi er with the red Clip LEDs constantly fl ashing.

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

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

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

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


page 11


3 Operation

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 airfl ow through foam dust fi lter

B. LCD Control Screen

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

The LCD Control Screen and its controls let the user adjust the amplifi er’s attenuation and muting, con fi gure 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 reconfi gure the amp for various applica tions.

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

D. USB 2.0 Connector

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

Red LED, one per channel, fl ashes when the ampli fi er output channel has stopped operating.

Usually this means that the amplifi er must be serviced.

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

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 fi er’s input and output signal levels. From top to bot tom the

LEDs are

–10 dB: amplifi er output is 10 dB below clipping.

–20 dB: amplifi er 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.

Blue LED indicates amplifi er has been turned on and

AC power is available. The LED will fl ash when the AC line voltage is 15% above or below the nominal rated range. This indicator can be turned off in Blackout mode.

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

Yellow LED illuminates when the amplifi er is set to

Bridge-Mono mode.

page 12

Figure 3.1 Front Panel Controls and Indicators



3 Operation

3.5 Back Panel Controls, Indica tors and Connectors

A. Fans

Provide front-to-back forced airfl ow 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 amplifi ers.

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 amplifi er exceeds safe limits, this breaker automatically disconnects the power supply from the AC mains. The switch resets the circuit breaker.

H. MAC Address

This specifi c amplifi er’s network identifi er that is burned into its fi rmware.

I. Preset Indicator

LED fl ashes 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 amplifi er 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 amplifi er 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 amplifi ers.

It is not recommended to loop through more than four amplifi ers. If larger distribution of AES is needed, the use of an AES distribution ampli fi er is recommended.

NETWORKING SECTION

N. Link/Act Indicator

Shows net work activity.The LINK ACT LED illuminates when the network port is connected and fl ashes 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 amplifi er 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.


Figure 3.2 Back Panel Controls and Connectors

page 13


4 Advanced Operation

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 Amplifi er ............................... 26

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

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

4.8.1 Amplifi er DSP Selection Screen .....................................27

4.8.2 Amplifi er Mode .............................................................27

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

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

4.8.5 Source Confi guration ....................................................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 Amplifi er Settings .......................................................34

4.8.14 Amplifi er 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




4.2 Navigating the LCD Control Screen

4.2.1 Introduction

The LCD Control Screen and its controls let you confi gure the ampli fi er 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 confi rmation: after you request a change, the display might say “Press and hold.” To confi rm a change, press and hold an Encoder knob. If you don’t want the change to occur during a confi rmation, turn the knob or wait fi ve 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”.


MENU TREE

Exit

Attenuation - Mute - Lockout

Menu button

ALL MENUS: Next/Previous loops

Sample Rate

Analog Input Sensitivity

Presets

Amp Mode

Locate

Next

ADVANCED MENU

Next

(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

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

Prev to

Cobranet

Menu

Level

Max

Suite

Exit

Exit

Next

Prev

Next

MONITOR MENU

(press knob once to access these items:)

Load Monitoring

Thermal %

Thermal Temp deg. C

AC Line Voltage

Operating Time

Watts Output

Next

NETWORKING MENU


Network Info

Manufacturing Info

HiQnet Node Address

DHCP

IP Address

Subnet Mask

Exit

Exit

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 fi rst 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.

Next

ALERT MENU


Amp Output Clip Errors

Analog Input Clip Errors

Thermal Errors

Low Limit Load Errors

High Limit Load Errors

SLM Errors

Line Voltage Errors

Fan Errors

Clear All Error Logs

Next

COBRANET MENU


Cobranet Information

Ch1 Cobranet Rx

Ch2 Cobranet Rx

Cobranet Tx

Cobranet Conductor Priority

Cobranet Transport Latency

To

Sample

Rate

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

Figure 4.2 The Menu Tree

page 15


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.


How to set the Maximum Analog Input level using the LCD

Control Screen:


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 confi rm and save your setting.

6. Press Menu/Exit.


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


Menu/Exit.

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

3. Push an Encoder knob.

4. Press Next until you see “Thermal Errors.

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

4.2.2 Basic Selections

Opening Screen: On power-up, the LCD Control Screen dis plays the

Crown logo. After a few seconds, the fi rmware 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.

-30.0

dB

-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 amplifi er 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.

-30.0

dB

MUTE

Front Panel Lockout (in the Attenuation screen)

The amplifi er’s administrator can control access to menu mode and the amplifi er’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 specifi c 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 specifi c parameter is protected, the screen says “N/A” or “Change Disabled.”

page 16




Sample Rate: Starting from the Attenuation screen, press Menu/Exit to go to the Sample Rate screen. The sample rate of the amplifi er’s DSP is displayed.

It can be modifi ed only in System Architect software because all of the FIR fi lter settings will need to be recalculated as a result of the change. Please refer to its

Help fi les. When you route a Cobranet input, the sample rate displayed here must match the Cobranet source.

96 kHz

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.

2.90

31.5

Vrms dB Gain

2.90

31.5

Presets: A preset is a group of DSP and amplifi er 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 confi rm. 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 amplifi er is operating exactly according to that preset.

(M) Modifi ed means that the amplifi er is operating according to the preset but with some settings changed.

If a preset number is fl ashing, it is not in use.

In the example shown below,

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

• The amplifi er settings have been modifi ed (M) since Preset 7 was loaded.

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

7

Preset7

CH

1:MF-1&2

CH

2: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 amplifi er is operating exactly according to that preset.

• The large “ 5” is fl 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.”

5

Preset7

CH

1:LF-1&2

CH

2:LF-3&4

Amp Mode: This screen lets you set up the amplifi er 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 confi rm 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 amplifi er 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.

<Dual>

Turn to Set-Press to Save

Locate: Allows users to identify a specifi c amplifi er in a large network of amplifi ers 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 fl ashes. 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.

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 fi ve times.

Advanced Menu

Push knob for adv. menu


page 17



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.

0.0

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.

INDEPENDENT


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.

<Analog> <Digital>

page 18

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 confi rm 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 Analog

1 2

Maximum Analog Input: Turn an Encoder to select the maximum input level to the amplifi er: +21 dBu or +15 dBu. Press the knob to confi rm your selection.

Note: Changing this value changes the range of sensitivities available to the amplifi er.

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.

+

15

dBu


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 confi rm your choice.

AES

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.

0.0

dB

0.0

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

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 confi rm your choice.

Cnet1 is Bundle A.

Cnet2 is Bundle B.

Cnet 1+2 is Bundles A+B.

Cnet 1 Cnet 2

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.

0.0

dB

0.0

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 confi rm 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.

2




Bandpass Gain: In each channel of the I-Tech HD’s DSP, just before the output limiter and after the preceding fi lter, is a gain block (not shown on the

Signal Path block diagram). Bandpass Gain adjusts the gain of this block between -24 dB and +24 dB.

Adjusting the bandpass gain in the LCD screen makes it easy to vary the level of subwoofers, midrange drivers and high-frequency driv ers.

0.0

dB

0.0

Output Polarity: Press each channel’s Encoder knob to toggle the output signal polarity between + and –.

+

Press enc to toggle

+

Input Delay: Sets the input signal delay in each channel. Turn each channel’s

Encoder knob to vary the delay. The delay step size is speed sensitive. Pressing the encoder enables or disables the Delay.

Below each channel’s delay setting is the equivalent distance in feet and meters.

For example, 10 ms is the signal delay of sound traveling 11.3 feet or 3.4 m.

0.0000

0.0/0.0

ms ft/m

0.0000

0.0/0.0

Output Delay: Sets the output signal delay in each channel. Turn each channel’s Encoder knob to vary the delay. The delay step size is speed sensitive.

Pressing the encoder enables or disables the Delay.

Below each channel’s delay setting is the equivalent distance in feet and meters.

For example, 10 ms is the signal delay of sound traveling 11.3 feet or 3.4 m.

0.0000

0.0/0.0

ms ft/m

0.0000

0.0/0.0


LED Meter Display Type : Here you can set the LCD bar meters to display average or peak levels. Turn an Encoder knob to select the option, then press the knob to confi rm your selection.

AVERAGE


Bar Meter Display Type: You can select what the bar meters will display in the Attenuator Screen. Press an Encoder knob to select Attenuation, Input

Levels, Output Levels, or Thermal %. Attenuation is displayed as the length of the bar meters in the Atten uation screen that appears on startup. The meters display average input levels and output levels.

ATTENUTATION


LevelMax - Clip Limiter: Limits the peak output voltage to just below clipping for each channel. Press an Encoder knob to turn it OFF or ON.

OFF OFF

LevelMax- Peak Voltage Limiter: Limits the peak output voltage to a level that you set, either OFF or 1 to 500 volts, for each channel. Press an Encoder to turn on the Limiter. Once it’s on, turn the Encoder to set the voltage. Additional controls, such as attack and release, are available through System Architect.

OFF OFF

LevelMax - RMS Voltage Limiter: Limits the output rms voltage to an amount that you set, either OFF or 1 to 500 volts, for each channel. Press the

Encoder to turn on the Limiter. Once it’s on, turn the Encoder to set the voltage.

Pink Noise Generator: Press an Encoder knob to turn on the generator. Its level will read –100 dB. Adjust the noise level from –100 dB to +20 dB in 0.5 dB steps by turning Encoder 1 or 2. To turn off the generator, press an Encoder knob or go to another menu item.

OFF dB

OFF

Front Panel Blackout: This screen lets you black out the front panel display unless you press a front-panel button or turn an Encoder. This feature turns off the LCD backlight and all front panel LEDs except for the fault LEDs and power-switch green LED. After blackout is enabled, an Encoder press/turn will “reactivate” the display. If no button is pressed/turned for 5 seconds, the display will return to blackout mode.

OFF

Exit: To exit the Advanced Menu and go to the Attenuation screen, press Menu/

Exit once.

OFF OFF

page 19



4.2.4 MONITOR MENU

This menu lets you monitor the status of the amplifi er. Starting from the

Attenuation Screen, press Menu, then press Prev four times. Or, starting from the Advanced Menu screen, press Next to go to the Monitor Menu screen. Then press an Encoder knob to access the selections in this menu.

Monitor Menu

Push knob for mon. menu

Load Monitoring: Press an Encoder knob to turn speaker load monitoring on or off for either channel. When load monitoring is on, the load connected to the amplifi er output is displayed. The text below the reported load indicates whether the value is within the limits set in Sys tem Architect. OFF means load monitoring is off. LOW means the load is below limits. HIGH means the load is above limits. NORMAL means the load is within limits.

OFF

Normal

OFF

Normal

Thermal %: This indicates the amplifi er temperature in percent, where 100% is the maximum allowable temperature. If Thermal % reaches 100%, the amplifi er is out of thermal headroom and has shut down (or will very soon).

Measurements are shown for Channel 1, Channel 2, and the power supply.

0

Ch1

0

Ch2

0

PS

Thermal Temp deg. C: This screen displays the temperature in degrees

Celsius of the Ch. 1 output devices, Ch. 2 output devices, and the power supply.

23

Ch1

23

Ch2

36

PS

AC Voltage: This shows the AC line voltage at the AC cord inlet to the amplifi er.

120

VAC

Operating Time: This displays the number of hours the amplifi er has been on since manufacture. Like a car’s odometer, it shows the total amount of operating hours and cannot be reset. All I-Tech HD amplifi ers come with a variable amount of operating time on them due to burn-in and testing before shipping.

108.8

Hrs

Watts Output: This displays the slow-averaged continuous output power of each channel in watts.

0.0

0.0

Ch1 Ch2

Exit: To exit the Monitor Menu and go to the Attenuation screen, press Menu/

Exit once.

4.2.5. ALERT MENU

To access this menu from the Attenuation screen, press an Encoder knob, then press Prev three times. This menu displays a wide variety of errors in the signal, amplifi er, or load. Push an Encoder knob to see the selections in the

Alert Menu.

Alert Menu

Push knob for alerts

Amp Output Clip Errors: A clip error occurs if the number of clip events in the amplifi er output exceeds the value set with the Count slider (within the time set by the Time slider) on the Amplifi er Settings page in System Architect.

page 20

When an error occurs, the count displayed in this screen is incremented, and the operat ing time since the error is displayed.

To clear this screen, press and release an Encoder. The display will prompt you to confi rm your choice by pressing and holding the Encoder.

0

0.0 Hrs Last

0

Analog Input Clip Errors: A clip error occurs if the number of clip events in the analog input exceeds the value set with the Count slider (within the time set by the Time slider) on the Amplifi er Settings page in System Architect.



NOTE: You must use System Architect to enable error reporting and set its limits.

0

0

0.0 Hrs Last

Thermal Errors: This screen lets you view thermal errors without using the control software. A thermal error occurs if the amplifi er thermal % exceeded the value set with the Thermal slider on the Amplifi er Settings page in System

Architect.




0

0.0 Hrs

Last

0




Low Limit Load Errors: This screen lets you view low-load errors without using the control software. A low limit load error occurs if the load impedance falls below the value set with the Low Limit spin control on the

Amplifi er Settings page in System Architect.

When an error occurs, the count displayed in this screen is incremented, and the operating time since the error is displayed.



0

0.0 Hrs Last

0

High Limit Load Errors: This screen lets you view high limit load errors without using the control software. A high limit load error occurs if the load impedance rises above the value set with the High Limit value on the software Control Panel.

When an error occurs, the count displayed in this screen is incre mented, and the operating time since the error is displayed.


NOTE: You must use System Architect to enable error report ing and set its limits.

0

0.0 Hrs Last

0


SLM (Sweep Load Monitoring) Errors: This screen lets you view SLM errors without using the control software.

When an error occurs, the count displayed in this screen is incremented, and the operating time since the error is displayed.



0

0.0 Hrs Last

0

Line Voltage Errors: This screen lets you view line-voltage errors without using the control software. A line voltage error occurs if the line voltage falls outside the values set with the High/Low Limits slider on the Line Voltage

Page of the Control Panel.

When an error occurs, the count displayed in this screen is incre mented, and the operating time since the error is displayed. The “Low” and “High” indicators show whether the line voltage was below or above the line-voltage limits.


NOTE: You must use System Architect to enable error report ing and set its limits.

0

0.0 Hrs Last

0

Fan Errors: When a fan error occurs, the count displayed in this screen is incre mented, and the operating time since the error is displayed.

0

0.0 Hrs Last Last

Clear All Error Logs: In this screen, you can press and hold an Encoder knob to clear all the error logs.

Exit: To exit the Alert Menu and go to the Attenuation screen, press Menu/Exit once.

4.2.6 NETWORKING MENU

To access this menu from the Attenuation screen, press an Encoder knob, then press Prev twice. This menu has screens for setting up audio network parameters. Push an Encoder knob to see the selections in the Networking

Menu.

Networking Menu

Push knob for net. menu

Network Info: This screen displays information about the audio network: IP address, HiQnet address, Subnet and MAC address. Section 9.1 of this manual explains these terms.

SUBNET:255.255.0.0

MAC: 00:0A:40:00:E4:C2

Manufacturing Info: This screen displays information about your I-Tech HD amplifi er: model number, fi rmware version, serial number, and amplifi er date code.

S/N:8001576436

Amp Mfg Date:

10-9-2008

HiQnet Node Address: This screen lets you set the HiQnet address of this amplifi er (a node in the network). Turn an Encoder knob to set the address, then press the knob to save your setting.

Hi net Node Addr

32


page 21



DHCP: Turn an Encoder knob to turn DHCP on or off, then press the knob to confi rm your selection. With DHCP enabled, the IP address of the amplifi er might change at power-up. See System Architect Help fi les for more information on DHCP.

OFF

Changes IP at powerUp

IP Address: You set the IP address of the amplifi er here. See Section 9.1 for more information on IP Address. This function is disabled when DHCP is enabled.

1. Press an Encoder knob to access the left three digits, then turn the knob to set the number.

2. Press again to access the middle three digits, then turn the knob to set the number.

3. Press again to access the next digit to the right, then turn the knob to set the number.

4. Press again to access the right-most digit, then turn the knob to set the number.

5. Press again to save the IP address.

192.168.1.1


Subnet Mask: You set the Subnet Mask of the amplifi er here. See Section 9.1 for more information on Subnet Mask. This function is disabled when DHCP is enabled.

1. Press an Encoder knob to access the left three digits, then turn the knob to set the number.

2. Press again to access the middle three digits, then turn the knob to set the number.

3. Press again to access the next digit to the right, then turn the knob to set the number.

4. Press again to access the right-most digit, then turn the knob to set the number.

5. Press again to save the Subnet Mask.

255.255.0.0


page 22

4.2.7 COBRANET MENU

To access the CobraNet Menu from the Attenuation screen, press an Encoder knob, then press Prev. This menu has selections for setting CobraNet parameters. Press an Encoder knob to access the CobraNet Menu selections.

See Section 9.2 and the System Architect Help fi les for more on CobraNet.

Cobranet Menu

Push knob for cnet. menu

CobraNet Tx: Turn the left Encoder knob to set the number of the TxA Bundle for Channel 1. Turn the right Encoder knob to set the TxA position for Channel

2.

0 0

TxA (ch1) TxB (ch2)

CobraNet Information: This screen displays information about the

CobraNet network: The fi rmware version, ethernet status (down or up), and conductor priority.

2.11.6

Ch1 CobraNet Rx: Turn the left Encoder knob to set the number of the RxA

Bundle for Channel 1. Turn the right Encoder knob to set the CobraNet input for

Channel 1. The word “Active” appears if there is audio on the bundle. Bundles

1-8 are available at 48 kHz sampling rate, and bundles 1-4 are available at 96 kHz sampling rate.

0

RxA Bundle

A c t i v e

Cnet Input

CobraNet Conductor Priority: Turn an Encoder knob to set the priority number of the CobraNet channel. Press the knob to confi rm your choice. See

Section 9.2 for more on CobraNet conductor priority.

16

CobraNet Transport Latency: Turn an Encoder knob to set the CobraNet transport latency: either 5.33, 2.66, or 1.33msec. Press the knob to confi rm your choice. This latency must match the Cobranet source for proper Cobranet reception.

5.33ms

Ch2 CobraNet Rx: Turn the left Encoder knob to set the number of the RxA

Bundle for Channel 1. Turn the right Encoder knob to set the CobraNet input for

Channel 2. The word “Active” appears if there is audio on the bundle. Bundles

1-8 are available at 48 kHz sampling rate, and bundles 1-4 are available at 96 kHz sampling rate.

0

RxB Bundle

Active

Cnet Input




4.3 Presets

4.3.1 Introduction

Your I-Tech HD amplifi er has a wide variety of onboard Digital Signal

Process ing (DSP). Some applications for this DSP are speaker confi guration

(set ting the drive levels, frequency bands, delays and limiting for your particular speakers), EQ, fi ltering, compression, and much more. Those functions are described in Section 4.6. System Architect software lets you adjust the DSP settings, such as fi lter slope, compression ratio, EQ frequency bands, and so on.

A preset is a group of DSP settings that confi gure the amp for a specifi c application. For example, you might use one preset that optimizes the amp’s

DSP for a JBL Vertec Line Array. You might use another preset that sets up the

DSP for a stereo pair of loudspeakers of your choice. You can choose any of

50 presets with the LCD Control Screen.

Preset 1 is the factory default preset and cannot be overwritten. It sets up the amplifi er for stereo operation with no DSP.

The I-Tech HD amplifi er works with two types of presets:

1. User presets. Using System Architect, you can create your own custom

DSP presets, label them, and send them to the I-Tech HD ampli fi er. The amp stores those presets in fi rmware. You can recall those presets from the LCD

Control Screen.

2. Downloadable presets. Crown and JBL engineers have designed presets that are optimized for various JBL loudspeakers, such as Vertec Line

Arrays. You can download presets from the I-Tech pages in the Crown website www.crownaudio.com. Then in the software, or with a USB drive, send the preset fi les to the I-Tech HD amplifi er, where you can recall them from the LCD

Control Screen.

We will describe each type of preset in detail.

4.3.2 User Presets

User presets are DSP presets that you set up. This is the basic procedure:

1. Adjust the DSP settings as desired in the System Architect soft ware (not with the LCD Control Screen).

2. Save this group of settings as preset. Give it a label.

3. Download the preset to the I-Tech HD amplifi er. See the software Help fi le for details. As soon as you save the setting as a preset, it is sent to the amplifi er. Another option, described on the next page, is to transfer the preset fi le using a USB drive.

4. Select that preset from the LCD Control Screen. The preset will automat ically set the DSP parameters as you set them up in the control software.

Setting some parameters of the DSP in the I-Tech HD amplifi er is done using the control software, not by the amplifi er’s LCD Control Screen. For example, if you want to set fi lter Q, compression ratio, or graphic EQ, you would do so within the System Architect software.

5. When you want to recall the preset, select it from the Preset screen in the

LCD display. The preset will automat ically set the DSP parameters as you set them up in the control software.

4.3.3 Downloadable Presets

Crown and JBL engineers have designed I-Tech HD DSP presets that are opti mized for various JBL loudspeakers, such as Vertec Line Arrays. To use them, follow this procedure in System Architect:

1. Go to the I-Tech pages at www.crownaudio.com.

2. Select Downloads.

3. Click on the fi le of your choice. It will download to your computer.

4. In System Architect, see the Help fi le on Presets for details on downloading the pre set to an I-Tech HD amplifi er. Basically, you will open and engage a data frame. The fi le will overwrite the preset you designate. Another option, described on the next page, is to transfer the preset fi le using a USB drive.

5. Recall the preset from the LCD Control Screen. Then your amp will be confi gured to work with the specifi ed loudspeaker model.

Section 4.8.19 describes the Presets Manager screen in System Architect.


page 23



4.4 File Transfer Via the USB Port

On the front panel of the amplifi er is a USB Type A port which can transfer fi les either direction between a USB fl ash drive and the amplifi er. These fi les can be of two types:

A Preset fi le, which contains amplifi er DSP settings for a specifi c loudspeaker/ amplifi er confi guration.

A Device fi le, which contain all 50 presets and the current amplifi er DSP settings.

When you plug in the drive, the amplfi ier defaults to a fi le-exchange mode and is muted. Then you can load or save individual fi les. No computer is needed for this fi le transfer.

How to transfer a fi le from a USB fl ash drive to the amplifi er:

1. The fi le must reside in the fl ash-drive root (top-level) directory.

2. Plug the fl ash drive into the amplifi er’s USB port on the front panel.

3. The screen asks if you want to load or save a fi le. Press the left Encoder to LOAD a fi le.

4. The screen asks whether you want to load a device fi le or preset fi le. Press the left

Encoder to load a device fi le, or press the right Encoder to load a preset fi le.

5. The screen says “Select File to Load.” Turn an Encoder to select the fi le.

6. If you are loading a preset, the front panel shows the acceptable fi les in the fl ash drive root directory. Turn the Encoder to view the fi les; press the Encoder to select.

Note: You can’t explore folders or subfolders.

7. The amplifi er loads the fi le into its memory and displays the Eject Menu. To stop the transfers, press the left Encoder. To continue with more transfers, press the right

Encoder.

8. Unplug the fl ash drive. The amp is unmuted and returns to the determined state.

9. If desired, recall the preset following the procedures in Sections 4.3.2 and 4.3.3.

Load Device File

Select file to load

(Pop-up box)

Loading Device File

(Pop-up box)

Loading File

Successful

(Pop-up box)

Loading File

Failed!

How to transfer a fi le from the amplifi er to a USB fl ash drive:

1. Plug the fl ash drive into the amplifi er’s USB port on the front panel.

2. The amplifi er goes into “File Mode” and is muted.

3. The front panel asks if you want to load or save a fi le. Press the right Encoder to select SAVE.

4. The screen will ask whether you want to save a device fi le or preset fi le. Press the left encoder to save a device fi le, or press the right encoder to save a preset fi le.

5. If you chose to save a preset fi le, the screen says “Select Preset to Save.”

6. The screen shows the preset fi les in the amplifi er’s memory. Turn an Encoder to view the fi les; press the Encoder to select.

7. The amplifi er’s Preset fi le will be saved to a default fi lename in the fl ash-drive root directory. If the default fi lename already exists, a number will be appended to the end of the fi lename.

8. You will see the Eject Menu. To stop the transfers, press the left Encoder. To continue with more transfers, press the right Encoder. Unplug the drive when fi nished.

9. Unplug the fl ash drive. The amp is unmuted and returns to the determined state.

Ch1

Enc

Load a File

DEVICE PRESET

Load Preset File

Select file to load

Select Preset to

Overwrite

(Pop-up box)

Overwriting Preset

Successful

Insert USB Device

USB Main Menu

LOAD or SAVE

(Pop-up box)

Overwriting Preset

Failed!

Ch1

Enc

(Pop-up box)

Safe to Remove

(Pop-up box)

Save to USB

Successful

EJECT MENU

DONE

Save Device File

Figure 4.3 USB File Transfer Flow Chart

Ch2

Enc

Save a File

DEVICE PRESET

(Pop-up box)

Save to USB

Failed!

(Pop-up box)

Save to USB

Successful

Save Preset File

Select Preset to

Save

NOTE: Pressing any of the navigation buttons

(MENU, PREV or NEXT) at any time will go to the

“EJECT-MENU” selection screen.

(Pop-up box)

Save to USB

Failed!

Ch2

Enc

page 24




4.5 List of Pop-Up Boxes and Descriptions

These messages may appear on the LCD screen.

If N/A is displayed, the particular menu has been locked out via System Architect software.

Lockout

USB

Lockout

Invalid

Subnet

Invalid

Address

Preset

Loaded

Address

Changed

DHCP

Changed

USB Fault

Overcurrent!

Device File is not valid!

Loading File

FAILED!

Loading File

Successful!

Confirm Change

(Press knob again)

Confirm Change

(Press and Hold)

Press and Hold

(Hold knob)

Change cancelled

No Change

Selected

Changes

Disabled

Change

Failed!

“Lockout” is displayed when front panel lockout has been enabled from either the software or front panel. It prevents any changes from the display.

“USB Lockout” is displayed when USB lockout has been enabled from the software.

It disables all USB functions.

An invalid subnet mask was selected.

An invalid IP address was selected.

The selected preset has been successfully loaded.

The selected address has been modified. Applies to HiQnet node address, IP address and subnet mask.

The current state of DHCP has been changed to either ON or OFF.

The USB drive is drawing more than 500mA of current.

The selected USB device file cannot be loaded because it is not valid. This is most likely a device file formatting problem. Try to create a new device file.

Loading the preset or device file from the USB device failed. This could be due to the

format or contents of the file.

Loading the preset or device file from the USB device was successful.

Displayed after the first button press. To continue, the user must release the button and press it again.

Displayed after the first button press has been released. To continue, the user must press the button again.

Displayed after the second button press. To continue, the user must continue to hold the button for at least 2 seconds.

To modify this parameter, the encoder button must be pressed twice with the second press being held down for at least 2 seconds. This message indicates that the encoder button was not properly pressed and/or held down.

The selected object to change has not been modified from the current value.

The display does not have permission to change this parameter. The display observes HiQnet access rights role 4. Individual screens’ parameters can be user defined as Write Protected and/or Read Protected. When a parameter is Read Protected, a “N/A” is displayed.

The selected change was not made. It may have been out of range or invalid.


page 25


4.6 Digital Audio Options (AES/EBU)

Digital audio inputs allow you to keep the amplifi er input signals in the digital domain. Keeping the input signal digital reduces the number of Dig ital-to-Analog and Analog-to-Digital conversions.

This provides better sound quality and reduces pickup of electrical interference.

The AES/EBU connector provides the most widely accepted format. Con nect an AES/EBU signal to the AES/EBU connector on the rear panel. If the amplifi er’s low-voltage power supply is lost for any reason, the AES input signal goes directly to the AES output. The amplifi er has a digital buffer converter so it will adapt to any AES sample rate between 32 and 96kHz that is sent to it.

4.7 Networking the Amplifi er

If you need help understanding network concepts, please see

Appendix A on Network and CobraNet Basics. Please check the

System Architect help fi le for directions on how to use its networking confi guration tools.

An I-Tech HD amplifi er may be used in an existing I-Tech network and can use existing I-Tech device or venue fi les.

You can make the following settings via the front panel or by using the Network Troubleshooter:

HiQnet node address

DHCP off/on

IP address

Subnet mask

You cannot set the CobraNet IP address via the front panel.

4.7.1 Network Troubleshooter

The network troubleshooter can assist you in setting up your

HiQnet network for the fi rst time. Using the troubleshooter, you can address your components and be informed of addressing and other errors in the system. Please note that this wizard is designed to work with devices that are on the same physical network segment as the computer it is running on. It will not work through a router.

page 26


Select Network Card

The fi rst page of the wizard lists all the network adapters currently in the computer. If you have more than one adapter, you can scroll through the list and see the IP Address assigned to each card.

If you have a card with an IP address of 0.0.0.0, it typically means one of several things:

1. The card is disabled.

2. The card is not connected to a network.

3. The card is setup to obtain its address from a DHCP server, and no DHCP server is available.

Select the card that is connected to the HiQnet system and click the Next button. The Wizard will walk you through the rest of the process. Please see the System Architect online help for more information.

4.8 Software-Controllable Onboard DSP

Crown’s latest-generation Digital Signal Processing is built into the I-Tech HD amplifi er. Its 24-bit/96kHz converters offer extremely low noise and extended dynamic range. When you use an I-Tech HD amp, the loud speaker processors, crossovers, limiters and delays are in the onboard DSP – so you don’t need those rack-mounted devices. This drastically cuts setup time, commissioning, rack space and costs.

The I-Tech HD’s DSP can be monitored and controlled with a computer running System Architect software, and connected to the amplifi er Network Connector by a network Category 5 cable.

Some applications for this DSP are:

• Set up signal fl ow

• Optimize system gain structure

• Set up speaker confi gurations (set the drive levels, frequency bands, delays and limiting for your particular speakers)

• Set up EQ, fi ltering, compression, and much more.

The next several pages explain some of the available DSP functions. See the System Architect Help fi les for more detailed information.




4.8.1 Amplifi er DSP Selection Screen

On the left of this screen is the Input Signal Level Monitor

(explained later on this page). On the right side are rows of DSP selection buttons for each channel. When you click on a button, a control panel opens for that button’s function.

Also on the right are buttons that open control panels for these functions:

• Amplifi er mode (dual, bridge-mono, input Y)

• Signal generator (pink noise and sine wave)

• Amplifi er information

• Recall and store presets

• Preset manager

• Apply to others (apply this amplifi er’s DSP settings to other devices)

We’ll explain each of these functions on the next several pages.

4.8.2 Amplifi er Mode

This is switchable between dual, bridge-mono and 1x2 (input Y).


4.8.3 Input Level, Mute, Link, Level Meters, and Indicators

This panel is on the left side of the I-Tech main control panel shown above. Channel 1 and 2 Level

Controls set the input signal level of each channel. Each channel can be muted, and both faders can be linked with the Link button.

Input Signal Level Meter

The measure ment range is from 0dBFS to –40dBFS with 0.5dB resolution. Each audio channel has the following monitors:

• Switched Audio Input: This meter shows only the switched (selected) audio input after the

Input Audio Router.

• Clip Indicator

Output Signal Level Meter

The mea surement 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 amplifi er. The left meter is rms and the right meter is peak. An output clip indicator is provided.

Indicators

Temp: Lights if the temperature of the amplifi er is too high and the amplifi er is near shutdown.

Green: Thermal headroom used up is less than 59%.

Yellow: Thermal headroom used up is 60-80%.

Red: Thermal headroom used up is more than 81%.

Limit: Lights when the amplifi er signal is being limited.

Load: Lights when the load impedance is out of range.

Ready: Lights when the amplifi er is on and ready to supply power.

page 27


4.8.4 Input Signal Router

Each channel of the I-Tech’s signal processing has an Input Signal Router that lets you choose the audio signal that will be used by the channel. Choose one of the following confi gurations:

• Analog Audio: This is the audio input from the audio connector on the back panel of the amp. Choices for the Analog Audio input are Channel 1,

Channel 2, or a sum of Channels 1 and 2.

• Digital Audio: This is the audio input from the AES/EBU connector or

CobraNet connector on the back panel of the amp. It can be set up for Digital with Analog Backup or Digital with Analog Override:

• Digital with Analog Backup

The input takes the digital signal as its source when the digital signal (or just the digital clock) is present. If the digital lock is lost, the input switches to the selected Analog Source. Once that digital lock is found again, the input switches back to the selected digital source. This works even when the digital signal has no audio but is sending a clock signal.

• Digital with Analog Override

The input takes the digital signal as its source. If the analog signal level is greater than an Analog Signal Detect Threshold that the user defi nes, the input switches to the analog signal. As long as the analog signal level exceeds the threshold, or as long as its level falls below threshold for a user-defi ned hold time, the input remains the analog signal.

Analog Signal Detect Threshold (-100 dB to 0 dB)

This option is not displayed unless override is selected. If the selected analog signal exceeds the threshold level, the analog signal becomes the source for this input rather than the selected digital input source. Use the numeric spin box or the fader provided to set the threshold.

Hold Time (0 - 60 seconds)

This option is not displayed unless override is selected. Once an overriding analog input signal falls below threshold, the Hold Time determines how long the input will continue to be the selected analog input before reverting to the selected digital input. Use the numeric spin box or the fader provided to set this time.

The control operation will vary based on the mode that is selected.

page 28





4.8.5 Source Confi guration

In this screen you can confi gure the levels and settings of the analog, AES and CobraNet inputs. The input signal of each channel can be independently muted.

The I-Tech HD amplifi er can be set to work as a fi xed gain amplifi er: any input signal is given a fi xed amount of gain, either 26dB or

32dB. In addition, you can set the input sensitivity to determine how much gain is provided. See Section 4.8.20 for more details.

4.8.6 CobraNet Advanced Settings

In the CobraNet Advanced Settings screen you can set the parameters shown here. Indicators that are green can’t be modifi ed.

The latency on this screen is the CorbaNet transport latency or buffering. This latency must be set to the same latency as the source CobraNet device.

The Foldback control panel lets you select the items to transmit via CobraNet. Selections available are the Analog

Inputs, Amplifi er Outputs or AES input signal. The audio can be routed out through only one bundle.


page 29


4.8.7 Input Signal Compressor

An input signal compressor is available for each channel. Several parameters control this feature:

On/off button: 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 “feedforward,” 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 defi ned 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 defi ned as the time it takes the compressor to increase the sig nal gain by 20 dB. The range is from 10 milliseconds to 10 seconds.

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

Makeup gain: The amount of gain you want to apply to the compressed signal to raise it to a higher level.

Knee width: The knee of the compression curve is the transition point between no compression and compression. The wider the knee, the more gradual is the transition -- so compression is not so obvious when the signal is close to threshold.

Beyond the controls for each channel, a single-control Com pressor Tie connects the compressors together. The compressors are tied at their sense points, meaning that the greater of the two input signals will be used as stimulus for both compressors. Each compres sor will still compress based on its individual threshold, attack, release and ratio settings.

page 30


4.8.8 Input Delay and Driver

Delay

In these screens you can set the signal delay for each channel in seconds, feet or meters.





4.8.9 Input EQ and Output EQ

These screens let you adjust channel equalization at up to 16 frequencies. You can select fi lter type, frequency, gain, and bandwidth in octaves or Q as set by the user preferences in System Architect. Changes to the equalizer’s frequency response can be done by typing in parameters or by click-dragging the response curve.

page 31



4.8.10 Crossover Filters

The Crossover section lets you use infi nite impulse response (IIR) or fi nite impulse response (FIR) fi lters for the crossover.

FIR advantages: FIR has a longer processing latency but has less phase artifacts compared to IIR. FIR allows for brickwall, 48dB/oct and

24dB/octave fi lters.

IIR advantages: FIR has one processing block per channel; IIR has one or more. For example, you can place an FIR at only one end of a channel, but you can place an IIR at either end.

page 32

The amplifi er contains two FIR blocks which can be used in various confi gurations:

• 2x2 mode: One FIR fi lter per channel can be used.

• Bridge mono mode: Both FIR fi lters can be used.

• 1x2 mode: Two modes are available – Duplicate or Unique. In Duplicate mode the same settings are used on both channels, allowing two FIR fi lters per bandpass. In Unique mode the FIR fi lters are limited to one per bandpass. However, if the High Pass of Channel 1 and Low Pass for

Channel 2 are set to identical slopes and frequencies, you can use FIR on all the bandpasses. The logic for this operation is built into the software controls. In addition, the Processing (FIR) latency sets the minimum frequency that can be set for an FIR.

A polarity inverter button lets you change the polarity of each channel independently.

Each audio channel has three separate places where fi lters can be placed in the system: input EQ (16 fi lters), Crossover, and Output EQ. Up to 24 fi lters per channel are available, plus crossover fi lters and 4 fi lters for the signal generator. Each fi lter has up to +/-24dB of gain. The following fi lters are available:

• Lowpass: Bessel 2-4, Butterworth1-4, and Linkwitz-Riley 8

• Highpass: Bessel 2-4, Butterworth1-4, and Linkwitz-Riley 8

• Lowshelf: Low-frequency shelving EQ

• Highshelf: High-frequency shelving EQ

• Lowpass EQ: Variable bandwidth, can be expressed as Q (0.100 to 35) or

Octaves (0.041 to 6.672)

• Highpass EQ: Variable Q from 0.1 to 25

• Parametric EQ: Variable Q form 0.1 to 35




4.8.11 LevelMax Suite

This is a suite consisting of a peak voltage limiter, average power limiter, clip limiter and thermal transducer limiter. First you will set the mode to automatic or advanced:

• Automatic mode: The software determines the best settings based on the signal characteristics.

You can modify only the RMS threshold, Speaker Thermal threshold and time constant. Everything else is set automatically.

• Advanced mode: You can modify the RMS threshold, Speaker Thermal threshold, time constant,

Peak threshold and Peak/RMS release.

Peak Voltage Limiter

This limits the peak voltage output of 4.8 the amplifi er. On: Enables or disables this function. You’ll set the parameters below:

• Threshold: Sets the level, in absolute voltage, which the limiter will allow from the amplifi er. The range is from 12 V pk to 255 V pk.

• Attack Time: Sets the attack time of the limiter. The attack time is defi ned as the time it takes the limiter to attenuate the output signal by 20 dB. The range is from 1 millisecond to 100 milliseconds.

The Instant setting attack time is instant (0 millisecond).

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

Average Power Limiter

This limits the long-term output power of the amplifi er. You’ll set the parameters below:

• Threshold: Sets the average power level, in watts, which the limiter will allow from the amplifi er channel. The range is from 10 watts to 10,000 watts. This level should be set to the connected loudspeaker’s long-term power rating. Also you must enter the loudspeaker’s nomi nal impedance.

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

Clip Eliminator: This limiter monitors the clip events and attenuates the input signal to prevent amplifi er clipping. The attack and release times are preset to optimum rates. Only one parameter controls this limiter. “Enable” enables or disables this limiter.

A lookahead feature prevents overshoot of the limiters. These settings were developed with JBL to protect the speakers from overvoltage.

Transducer Thermal Limiting

This limits the long-term output power of the amplifi er to what the loudspeaker load can handle without overheating and going into thermal compression. You can set the thermal level at which the thermal limiter engages, the thermal response time and thermal voltage. Your loudspeaker manufacturer might be able to provide this information. Meters show the amplifi er output level in dBFS; and peak, rms, and total gain reduction.


4.8.12 Front Panel Security

Here you can choose which amplifi er LCD screens to lock so they can’t be changed.

page 33


4.8.13 Amplifi er Settings

The Amplifi er Output Enable button turns each channel on or off.

Error Reporting

The I-Tech amplifi er can detect four different error conditions per channel and errors in the AC line voltage. Each error type can be indi vidually confi gured to report the error through the network. Network reported errors appear in the control software

Event Log. The following describes each error source.

Clip: A clip detector is provided each channel. These monitors will indicate any clip condition (> 0.05% distortion) in the amplifi er channel. The clip detectors also can indicate Thermal

Level Control limiting.

The I-Tech HD can be confi gured to report if an excessive number of output clip events occur in either amplifi er channel.

The clip events are consider an error if they exceed the defi ned count per the defi ned 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 defi nes 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 defi ned as the start of each clip and every

10 milliseconds the amplifi er is in clip thereafter. Using a high count set ting with a short time setting may result in clip errors never being detected.

Thermal: Errors can be generated for excessive temperature in the output section of the amplifi er channel. The Threshold

Control sets the level that, if exceeded, will generate the error report. This control has a range of 1 to 100%.

Line voltage: The AC line voltage can be monitored and an error generated whenever the voltage is outside of the limits set by the soft ware.

Fan: Using the ON button, you can enable reports of any fan errors.

page 34


Continuous Load Monitoring

The load supervision feature allows real-time monitoring of the load connected to each amplifi er channel. When enabled, the I-

Tech contin uously monitors the amplifi er output voltage and current, and calcu lates the long-term average load impedance.

The measured load impedance is compared against the userdefi ned 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:

On: Enables or disables the load-supervision function.

Load Status: This indicator shows the present sta tus of the load impedance with respect to the user-defi ned high and low limits.

Average Impedance: Sets the expected average impedance 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.

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.

Average Impedance: Sets the expected average impedance 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. You set this fi eld to the nominal impedance of the connected load per channel.

Report Errors via Network: When this is turned on, high and low load errors are sent via the network to System Architect software.




4.8.14 Amplifi er Information

Information about the amplifi er is stored in the software system inven tory and is displayed on the software control panels. Information includes manufacturer, model, date code, and serial number. The green items can’t be edited.

Channel Labels: Each amplifi er includes two labels that you may edit for your own use. Simply type in the text areas. Use these labels to describe the channels of your amplifi er. These names will appear in the individual processing blocks.

Attenuator Limits: This lets you set a limit on the attenuators. You can set the maximum attenuation from 0 dB to –100 dB. Once set, attenuation cannot be adjusted beyond this level.

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.

Blackout Mode: This button lets you blackout the front panel display until you press a front-panel button or turn an Encoder. This feature turns off the LCD backlight and all front panel LEDs except for the fault LEDs and powerswitch green LED. After blackout mode is enabled, an

Encoder press/turn will “reactivate” the display. If no button is pressed/turned for over 5 seconds, the display will return to blackout mode.


4.8.15 Apply to Others

This screen lets you apply the System Architect settings for your I-Tech HD amplifi er to other I-Tech HD amplifi ers in the venue fi le.

4.8.16 Delay (Latency)

Due to the nature of DSP processing, there is some inherent delay or latency within the I-Tech’s DSP. These latencies are shown in Table 4 below:

Table 4. I-Tech HD latencies at two sample rates

Sample rate

48 kHz

96 kHz

ADC

250µs

94µs

DSP

666µs

333µs

DAC

196µs

48µs

Amplifi er

Total latency

54µs 1.166ms

54µs 529µs

These latencies do not include CobraNet Transport Latency and FIR Processing

Latency.

page 35


4.8.17 Preset Manager

The control settings for all the functions can be stored as presets. Up to 50 presets can be saved in the I-Tech amp’s nonvolatile memory. Each preset can be named with a 30 character name describing its function, which is also stored in memory.

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

• The Recall Preset Control recalls the specifi ed preset settings. It appears in the Active Preset fi eld. If you change the settings after recalling a preset, the

Store button will turn yellow.

You can drag the presets to place them in a logical order. Also, you can color-code the presets to organize them.

page 36





4.8.18 Signal Generator

Both channels share a noise generator that 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: Turns the noise generator on or off.

• Noise Type: Selects full-spectrum white noise or pink noise.

• Noise Level: Sets the noise level with a fader.

The sine-wave signal generator lets you mix a single tone into the audio signal. Its controls are listed below:

• Sine On/Off: Turns the sine-wave generator on or off.

• Sine Frequency: Sets the frequency anywhere from 20Hz to 20kHz.

• Sine Level: Sets the level of each channel’s sinewave signal independently.

The noise generator and sine-wave generator cannot be used at the same time.


page 37



Maximum analog input

Low +21 dBu (0 dB)

High +15 dBu (+6 dB)

Analog input

AES input trim

Analog input sensitivity

AES input

Fixed gain

Low +21 26/32 dB

Hi +15 32/38 dB

Source select

Output attenuator

Fixed gain compensation

Limiters

Cobranet input

Cobranet input trim

Figure 4.4 The Various Gain Settings in the I-Tech HD

4.8.19 Fixed-Gain Mode in the I-Tech HD

Fixed-gain mode makes any I-Tech HD model have the same gain, regardless of output power.

To do that, fi xed-gain mode sets the Analog Input Sensitivity to 0 dB gain, then adjusts the Fixed Gain Compensation fader, and the Maximum

Analog Input, to achieve 26 or 32 dB of gain (if the Maximum Analog Input is set Low), or to achieve 32 or 38 dB of gain (if the Maximum Analog Input is set High), no matter what model the amplifi er is.

However, In fi xed-gain mode, the input trims (Analog, AES, CobraNet) can still be adjusted.

page 38

Amplifier



5 Troubleshooting

“Off/Flashing/On” means that the

LED can be off, or fl ashing, or on.

CONDITION: Power indicator is

off and power switch is not illu-

minated.

POSSIBLE REASON:

• The amplifi er has lost AC power.

• The amplifi er is not plugged into the power receptacle.

• Rear-panel breaker is off.

CONDITION: Power indicator

is off and power switch is illu-

minated.

POSSIBLE REASON:

• The amplifi er’s power switch is off.

CONDITION: Power indicator is fl ashing.

POSSIBLE REASON

• The AC line voltage has dropped below

15% or has risen above 15% of the rated range.


CONDITION: Thermal indicator is on.

POSSIBLE REASON:

• The amplifi er is becoming too hot for safe operation. Allow amplifi er to cool. Check for loads less than 2 ohms, and for excessive input levels. Check for proper ventilation.

CONDITION: Fault indicator is fl ashing.

POSSIBLE REASON:

• The amplifi er channel has stopped operating. Refer the unit to an authorized

Crown Service Center.

CONDITION: Power indicator is

off and power switch is not illu-

minated.

POSSIBLE REASON:

• Load is wired incorrectly or Output Mode switch in LCD-screen menu is set incorrectly. Check both.

• Input is overloaded by a signal level that is too high. Turn down your amplifi er level controls (Encoders), or turn down the input signal, until the clip light goes out.

Note: If the signal sounds distorted even though the Clip LED is off, the input signal may be distorted before it reaches the amplifi er input. Check gain staging and output levels of the mixer or preamp.

page 39

5 Troubleshooting

page 40

CONDITION: No sound, even though

the amp has power. Power LED is on with out fl ashing and the amp is receiving an input sig nal. Signal indicator is on or fl ashing.

POSSIBLE REASON

• Speakers not connected.

• Open circuit due to speaker failure.

• There is a short on the amplifi er output. First disconnect your speakers from the affected channel(s) one by one to determine if one of the loads is shorted.

• Ready LED is off. Channel has been set to standby mode via the software.

• Amplifi er is in blackout mode. Press or turn an Encoder to reactivate the LCD display.

CONDITION: No input signal. Signal indicator is not fl ashing even though audio is applied, and the channel is ready.

POSSIBLE REASON

• Input signal level is very low.

• Another source is selected or routed.


CONDITION: Data indicator not fl ashing, even though host computer software is active.

POSSIBLE REASON:

• Cable between computer and amplifi er is bro ken or not connected.

Note: Data indicator fl ashes only when the amplifi er is polled for data, or is polled to see whether it is online.

CONDITION: Yellow LINK ACTIVITY indicator in

Ethernet connector does not illuminate or fl ash.

POSSIBLE REASON:

• Ethernet link is broken.

CONDITION: COND indicator is off.

POSSIBLE REASON:

• There is only one conductor allowed per network system. This indicator is lit only when the amplifi er is the conductor.

• Amplifi er is in blackout mode. Press or turn an Encoder to reactivate the LCD display.

CONDITION: Computer does not communicate with the network devices.

POSSIBLE REASON:

• Incorrect wiring. See Section 3.5 letter O on network wiring.

• IP Addressing is not done correctly. Use the Network Troubleshooting

Wizard in System Architect.



6 Specifi cations

Minimum Guaranteed Power

20 Hz - 20 kHz with 0.35% THD

Stereo, 2 ohms (per ch.)



Bridge mono, 4 ohms

Bridge mono, 8 ohms

Performance

Input Sensitivity (volts RMS) for rated output

Voltage Gain for full rated power at 8 ohms

Frequency Response (at 1 watt, 20Hz - 20 kHz)

Signal to Noise Ratio below rated full-bandwidth power, A-weighted

Total Harmonic Distortion (THD) at full rated power at 1 kHz

Intermodulation Distortion (IMD) 60 Hz and 7 kHz at 4:1,

from full rated output to –35 dB

Maximum Input Level

Latency

A/D, D/A Converters

Digital Input

Network

DSP

Attenuators


I-T5000HD

1800W

2000W

1250W

3600W

4000W

I-T5000HD

Adjustable in 0.1V steps from

1.28V to 8V

37.1 dB to 22.2 dB

± 0.25 dB

> 108 dB

< 0.1%

< 0.35%

I-T9000HD

2500W

3000W

1500W

5000W

6000W

I-T9000HD


1.28V to 8V

37.9 dB to 23.0 dB

± 0.25 dB

> 108 dB

< 0.1%

< 0.35%

I-T12000HD

3500W

4000W

2100W

7000W

8000W

I-T12000HD


1.28V to 8V

40.1 dB to 24.5 dB

± 0.25 dB

> 108 dB

< 0.1%

< 0.35%

+15 dBu or +21 dBu, depending on setting of maximum input level

1.16 mS at 48 kHz, 529 µS at 96 kHz

24-bit 96 kHz Cirrus Logic

AES/EBU, 24-bit, 32-96 kHz.

Onboard sample rate converter.

Onboard HiQnet and TCP/IQ, compatible with standard 100Mb Ethernet hardware

24-bit conversion with 32-bit, fl oatingpoint DSP processing

Speed-sensitive rotary encoders, 0.5 dB steps, range 0 to –100 dB.








Speed-sensitive rotary encoders, 0.5 dB steps, range 0 to –100 dB








Speed-sensitive rotary encoders, 0.5 dB steps, range 0 to –100 dB

page 41


Performance

Damping Factor (8 ohms): 20 Hz to 100 Hz

Crosstalk (below rated power, 20 Hz to 1 kHz)

Common Mode Rejection (CMR) (20 Hz to 1 kHz)

DC Output Offset (Shorted input)

Input Impedance (nominal)

Load Impedance (Note: Safe with all types of loads)

Stereo

Bridge Mono

Required AC Mains

AC Line Connector

Construction

Ventilation

Cooling

Dimensions

Weight

Net

Shipping


I-T5000HD

> 5000

> 80 dB

> 55 dB, typically > 70 dB

< ± 3 mV

20 kilohms balanced, 10 kilohms unbalanced

I-T9000HD

> 5000

> 80 dB


< ± 3 mV


I-T12000HD

> 5000

> 80 dB


< ± 3 mV


1-2-4-8-16 ohms

2-4-8 ohms

Universal AC input, 100-240VAC (±15%),

50/60 Hz. Max. AC mains voltage 277VAC.

USA, UK, European, Australia, India

I-T5000HD

Flow-through ventilation from front to back

Dual-zone, microprocessor controlled, continuously variable speed fans

EIA Standard 19-inch rack mount width (EIA

RS-310B), 3.5-inch (8.9-cm) height, 16.2-inch

(41.1-cm) depth behind front mounting surface

1-2-4-8-16 ohms

2-4-8 ohms




I-T9000HD






1-2-4-8-16 ohms

2-4-8 ohms




I-T12000HD






28 pounds (12.7 kg)

36 pounds (16.3 kg)

28 pounds (12.7 kg)

36 pounds (16.3 kg)

28 pounds (12.7 kg)

36 pounds (16.3 kg)

page 42




Charts


Figure 6.1 Typical Frequency Response (1W) Figure 6.2 Typical Crosstalk vs. Frequency

page 43



page 44

Figure 6.3 Typical Damping Factor vs. Frequency



7 AC Power Draw and Thermal Dissipation

I-Tech 5000HD AC Current Draw and Thermal Dissipation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz.

Typical line impedance used.

Data based on both channels driven.

Load

Idle (sleep mode)

Idle (awake)

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

Typical of program material

16 Ohms Bridge just at clip.

4 Ohms/Ch.

8 Ohms Bridge

2 Ohms/Ch.

4 Ohms Bridge

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

Typical of program material with severe clipping.

16 Ohms Bridge

4 Ohms/Ch.

8 Ohms Bridge

2 Ohms/Ch.

4 Ohms Bridge

Line Current

120VAC

0.8

1.6

120VAC

Watts Out

Per 1A

Amp Line

Current

I-T5000HD

208VAC

Line Current

208VAC

0.95

1.4

Watts Out

Per 1A

Amp Line

Current

Line Current

230VAC

0.9

1.3

230VAC

Watts Out

Per 1A

Amp Line

Current

Watts

Dissipated

53

172

5.3

59.6

3.4

94.6

3.1

102.6

305

7.8

8.0

64.9

58.1

4.7

4.8

106.9

96.1

4.4

4.4

116.3

106.0

414

476

10.9

17.8

17.7

77.1

77.0

70.3

6.6

10.5

10.7

126.2

129.1

115.3

6.0

9.5

9.4

139.9

142.1

128.7

437

711

824

Thermal Dissipation

Btu/hr

182

587

1040

1413

1625

1491

2426

2814 kcal/hr

157

505

262

356

410

376

612

709


page 45







Load

Idle (sleep mode)

Idle (awake)


Typical of program material just at clip.

16 Ohms Bridge

4 Ohms/Ch.

8 Ohms Bridge

2 Ohms/Ch.

4 Ohms Bridge



16 Ohms Bridge with severe clipping.

4 Ohms/Ch.

8 Ohms Bridge

2 Ohms/Ch.

4 Ohms Bridge

Line Current

120VAC

1.0

2.1

120VAC

Watts Out

Per 1A

Amp Line

Current

I-T9000HD

208VAC

Line Current

208VAC

1.0

1.7

Watts Out

Per 1A

Amp Line

Current

Line Current

230VAC

0.95

1.6

230VAC

Watts Out

Per 1A

Amp Line

Current

Watts

Dissipated

60

225

6.6

57.6

4.2

91.2

3.8

99.8

392

11.6

65.7

7.0

108.8

6.3

120.4

593

11.5

55.9

6.8

96.5

6.2

105.3

695

13.6

27.6

25.0

74.4

73.9

67.0

8.1

16.0

14.9

125.3

127.2

113.5

7.4

14.3

13.6

137.2

141.0

124.3

579

1149

1223

Thermal Dissipation

Btu/hr

205

767

1338

2024

2373

1977

3921

4173 kcal/hr

177

660

337

510

598

498

988

1052

page 46








Load

Idle (sleep mode)

Idle (awake)



16 Ohms Bridge just at clip.

4 Ohms/Ch.

8 Ohms Bridge

2 Ohms/Ch.

4 Ohms Bridge


Typical of program material with severe clipping.

16 Ohms Bridge

4 Ohms/Ch.

8 Ohms Bridge

2 Ohms/Ch.

4 Ohms Bridge

Line Current

120VAC

0.9

2.0

120VAC

Watts Out

Per 1A

Amp Line

Current

I-T12000HD

208VAC

Line Current

208VAC

1.1

1.8

Watts Out

Per 1A

Amp Line

Current

Line Current

230VAC

1.0

1.6

230VAC

Watts Out

Per 1A

Amp Line

Current

Watts

Dissapited

62

213

8.3

63.6

5.1

103.3

4.7

111.8

441

14.6

14.2

68.8

62.9

8.7

8.2

115.2

106.1

8.0

7.7

124.5

113.6

701

764

18.1

35.1

33.9

77.4

76.3

69.2

11.0

20.8

19.9

128.3

128.6

118.0

9.9

18.7

17.9

142.0

144.2

131.1

715

1370

1589

Thermal Dissipation

Btu/hr

212

726

1504

2394

2607

2439

4677

5425 kcal/hr

183

625

379

603

657

615

1179

1368


page 47


8 Advanced Features

8.1 Protection Systems

Your Crown amplifi er provides extensive pro tection and diagnostic capabilities, including thermal level control, fault indicators, high-pass fi ltering, DC protect, AC under/over volt age protection, inrush limiting, and variable-speed fans with tachometer feedback. Microprocessor monitors fans, and signals an error via System

Architect if fans are not operating.

8.1.1 Thermal Level Control (TLC)

If the amplifi er becomes too hot for safe opera tion, the TLC will engage the input compressor and the clip LED will illuminate. By compress ing the input, the amplifi er 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. This feature allows the show to go on, rather than having the amplifi er shut down, and only occurs in extreme situations.

8.1.2 Circuit Breaker

If the current draw of the amplifi er exceeds safe limits, this breaker automatically disconnects the power supply from the AC mains.

8.2 Global Switching Power Sup ply with PFC

Thanks to its global power supply, the I-Tech amplifi er works anywhere in the world. There’s no need to reset an AC mains voltage switch, and no need to order a special model. The amp will work and meet all specs on 100V - 240VAC,

50/60 Hz.

Crown’s Switching Power Supply minimizes the amplifi er’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 operate 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) trans former because they fi rst convert the AC up to a much higher frequency, thereby reducing waste.

Power Factor Correction (PFC) controls how your amplifi er draws current from the AC mains.

Instead of drawing high-magnitude cur rent spikes that reduce the capacity of your power distro (and couple noise into other sys tem components), PFC draws a smooth and quiet current waveform that is in phase with the mains voltage waveform. PFC allows you to reduce the size and weight of your power distri bution and improve the performance of your signal processors.

8.3 3rd Generation Class I Cir cuitry

Class I (BCA, Balanced Current Amplifi er)

Interleave technology allows high levels of power output without all the associated heat found in a conventional amplifi er. This highly effi cient design also provides accurate, uncol ored sound with very low distortion and a high damping factor for tight, clean bass response. And it can deliver more power to reactive loads than conventional dissipative designs (com fortably driving the latest hightechnology transducers). Class I also reduces current draw of the AC mains, providing energy conserva tion.

8.4 Color-Coded Rear Overlay

The labels on the rear panel are color coded to group similar functions under common colors.

page 48



9 Appendix A: Network and CobraNet Basics

9.1 HiQnet Networks

Background: A Local Area Network (LAN) is a group of computers in a venue that share data, either through cables or via wireless transmission. Ethernet is a popular

LAN communication protocol for PCs. An audio network is a Local Area Network made of audio devices and one or more computers. A subnet is a small network within a larger network. For example, an audio network might have two subnets: one for enter tainment audio, and one for paging.

One use of an audio network is to control and monitor power amplifi ers on stage from a computer at Front-of-House. You can set amplifi er levels, adjust crossovers, measure speaker impedance, check for overheating and clipping, all from the house mixing con sole.

You need a way to send computer commands to several audio devices at once. This is done with an Ethernet switch, which is something like an audio Y cable or distribu tion amp. The computer, and all the audio devices, connect to the switch as in Figure 9.1.

HiQnet protocol lets you control and monitor cer tain Harman products (including

Crown) on an Ethernet network. Figure 9.1 shows a typical HiQnet network.

HiQnet control offers many advantages:

• Use of “off-the-shelf” network hardware. HiQnet uses standard hardware commonly used in the computer industry, making it both low-cost and readily available.

• Better Performance. Meters display faster in realtime because the network is wide bandwidth.

HiQnet provides these functions:

• Quickly fi nd all HiQnet components connected to the network.

• Synchronize multiple control points on a network.

• Control and monitor components on different Local Area Networks (LANs) through the use of an IP router (explained later).

• Upgrade fi rmware via the network.

Network Addresses

Each component in a HiQnet network has three addresses to identify it:

• Media Access Control (MAC) Address

• Internet Protocol (IP) Address

• HiQnet Address

Let’s explain each identifi er.


Computer

Laptop

I-T5000HD

I-T5000HD

I-T9000HD

I-T9000HD

I-T12000HD

100Mb Switch

Figure 9.1 A HiQnet Network

page 49


MAC address: Short for Media Access Control, MAC is an address for an audio compo nent that is burned into fi rmware in the component by its manufacturer, and cannot be changed.

Every component in a network has its own unique MAC address. The MAC address is printed on a label outside the component. It is shown in hexadecimal format as 6 two-byte octets such as:

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

HiQnet Address: When you set up a network with System Architect soft ware, you assign an address to each component. Each component has its own address, numbered from 1 to

64,999.

Internet Protocol (IP) Address: When you set up a network, you assign an IP address to each component. The IP address identifi es each component. That way, certain data can be sent to the correct address (the correct component). An IP address has four numbers sepa rated by periods. Each of the four numbers must be 0 to 255. For example:

192.168.0.1

Part of an IP address the network ID, and the remaining part is the host ID. The host ID is either:

• A subnet number and a device address.

• A device address (if there is no subnet in the network).

To identify which part of the IP address is the network ID, you assign a Subnet Mask to the network. A Subnet Mask is four numbers (0-255) separated by periods. “255” means “this part of the address is the network ID”. For example, if the subnet mask is 255.255.0.0, and the

IP address is 192.168.0.127, the network ID is 192.168.

IP Router

To communicate between different networks, you need an IP Router. Any control data or monitor data that is sent to the other network must go through the IP Router.

The IP address allows components and computers on multiple networks to communicate with each other through the use of an IP Router as shown in Figure 9.2.

Here is an application for a router. Wireless devices, because of bandwidth limitations, can not be on a CobraNet network. However, the wireless devices can be on a non-CobraNet net work, and access CobraNet devices through a router using IP addressing.

Discovery is the process where System Architect fi nds all the devices on an audio network and lists them on the computer screen. Discovery cannot be done through an IP router, so a

Discovery Proxy is required. If you need to control or monitor components that are on another subnet, you will need to specify ONE component on the remote network that can act as a Discovery Proxy. Currently, all networked Crown products except the PIP Lite can function in this capacity.

To add a Proxy, select Setup > Network Setup > Proxy addresses. Choose any one of the components listed above, type its IP address in the box under Proxy Addresses, then click the

Add button. To remove a Proxy, select the IP address in the list and click the Remove but ton.

page 50

AUDIO NETWORK

PIP-Lite

Computer

I-Tech HD power amplifiers

100Mb Switch

Laptop

VENUE NETWORK

Computer

Laptop

IP Router

100Mb Switch

Wireless Access Point

Figure 9.2 Multiple-Network Communication Via an IP Router



9.2 A Closer Look at CobraNet

Licensed by Cirrus, CobraNet is a protocol, fi rmware and hardware that lets you transmit digital audio over a 100Base-T Fast-Ethernet network.

This section provides an overview of CobraNet. Cirrus Logic has provided a number of technical papers that describe CobraNet in detail. These papers are available at: http://www.cobranetinfo.com.

9.2.1 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 (components). This forms a star network (see Figure 9.1). 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 message 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 9.2.

Today, commonly available networking cards are 10/100Base-T capable, 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 fi ber. Proprietary “Fast Ethernet via single mode fi ber” networks can reach even further.

9.2.2 Audio Specs

Sample rate: CobraNet can handle sample rates of 48 kHz or 96 kHz. I-Tech HD is switchable between 48 kHz and 96 kHz.

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

Latency: The transmitter and receiver buffers required for reliable transmission are set to 256 samples as a default. This gives a network transmission latency of 5.333 mS

(256 samples at 1/48 kHz per sample). I-Tech HD latency is switchable between 1.33,

2.66, and 5.33 mS.

9.2.3 Bundles and Audio Channels

You assign 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 8 bundles can be sent in a 100 Mbps line, depending on the signal’s bit depth and sampling rate. Only 4 bundles are available when 96 kHz sampling rate is in use.

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 effi cient use of network bandwidth. If 24-bit data is desired, then only 7 audio channels can be loaded into a single

Bundle. With a 96 kHz sample rate, only 4 channels of audio are available.


Figure 9.3 Star Topology

Figure 9.4 Multi-Star Topology

page 51


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 indi cates which devices are communicating with each other.

Also in System Architect, you address each connection as Multi-

cast or Unicast. A Multicast (Broadcast) connection is from one trans mitter 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 sev eral 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.

The “Receiver Count” monitor indicates how many devices are receiving the digital audio bundle. The “Active” indicator indicates whether the par ticular Bundle is being actively transmitted onto the network.

9.2.4 The Conductor

A CobraNet system is coordinated by one audio device in the network called the Conductor. It regulates the CobraNet digital audio traffi c 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 priority 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-defi ned

“beat” packet to all components to recover synchronous timing information. The “beat” also specifi es which addresses can transmit at certain 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 timeslot is deter mined by the assigned bundle priority. Higher bundle priorities receive lower-numbered positions and are transmitted fi rst.

9.2.5 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 fl ow, more

Bundles and more audio channels.

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

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

page 52



9 Appendix B: Setting Sensitivity for Best Gain Staging

Optimized system gain structure maximizes signal to noise within the sys tem.

Adjusting your amplifi er to fi t within an optimized system gain struc ture is accomplished by properly setting both the sensitivity and attenuation controls within the amplifi er. I-Tech amplifi ers offer 149 sensi tivity and gain settings allowing very fi ne adjustment of the amplifi er’s gain and voltage sensitivity.

The Appendix section of the I-Tech Application guide (online at www.

crownaudio.com) provides charts with sensitivity in volts and gain in dB for each sensitivity/gain setting.

With other amplifi ers, it is often necessary to apply attenuation in order to achieve the desired sound pressure level. Large amounts of attenuation are not necessary with I-Tech amplifi ers and can, in fact, degrade performance. The attenuation adjustment should only be used for small (3 dB) or tempo rary adjustments in amplifi er gain. Instead, set the sensitivity/gain of your I-Tech amplifi er so that you can achieve the desired output with the attenu ators at or near 0 dB.

Example: Suppose that you are using an I-T9000HD with the sensitivity/gain set at 1.4V/37.1 dB. After optimizing the gain structure of the rest of your system you fi nd that attenuating the amplifi er by 10 dB produces the desired loudness. The same output level, with improved signal-to-noise ratio and headroom, can be achieved by using 0 dB of attenuation and by setting the amplifi er sensitivity/gain to 5.81V/27.0 dB (37 dB – 10 dB = 27 dB).

Note: as indicated in the online appendix, the list of possible sensitivity settings is different for each position of the max input setting. If, while adjusting sensitivity/gain in your amplifi er, you do not fi nd the setting you need, try changing the status of the max input setting and search again.


page 53


10 Service

Crown amplifi ers 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 qualifi ed 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 country in which the product was purchased.

10.1 International and Canada Service

Service may be obtained from an authorized service cen ter.

(Contact your local Crown/Amcron representative or our offi ce 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.

10.2 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.

10.2.1 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.

10.2.2 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.

10.2.3 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.

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.

10.2.4 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, hard ware, 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 important 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 war ranty.

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 endcushions in place.

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

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 fi ll 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 Service

Information form (or securely attach it to the outside of carton) and re-seal the shipping pack with a sturdy carton sealing tape.

10.2.5 Estimate Approval

Approval of estimate must be given within 30 days after being notifi ed 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.

10.2.6 Payment of Non-Warranty Repairs

Payment on out-of-waranty 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

page 54



11 Warranty

UNITED STATES & CANADA

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 three (3) 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 country in which the product was purchased.

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 other encumbrances. The refund will be equal to the actual purchase price, not including inter est, insurance, closing costs, and other fi nance 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. 9/07


page 55

11 Warranty


WORLDWIDE EXCEPT USA & CANADA

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 Crown1 product, for a period of three (3) years from the date of pur chase by the original purchaser (the

“warranty period”) that the new Crown product is free of defects in materials and workmanship, and we further warrant the new Crown product regardless of the reason for failure, except as excluded in this Warranty.

Warranty is only valid within the country in which the product is purchased.

1 Note: If your unit bears the name “Amcron,” please substitute it for the name “Crown” in this warranty.

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 other encumbrances. The refund will be equal to the actual purchase price, not including inter est, insurance, closing costs, and other fi nance 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. We will remedy the defect and ship the product from the service center within a reasonable time after receipt of the defec tive product at our authorized service center.

HOW TO OBTAIN WARRANTY SERVICE

You must notify your local Crown importer of your need for warranty service within the warranty period. All components must be shipped in the original box. Corrective action will be taken within a reasonable time of the date of receipt of the defective product by our authorized service center.

If the repairs made by our authorized service cen ter are not satisfactory, notify our authorized ser vice 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 RESULTING FROM

SUCH A DEFECT.

WARRANTY ALTERATIONS

No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown Warranty 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

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. 9/07

page 56



PRODUCT REGISTRATION

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

Warranty is only valid within the country in which the product is purchased.

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.

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

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

Company: _________________________________________________________________________________

* Mailing address: ____________________________________________________________________________

* City: ____________________________* State: ___________________________* Zip Code: ________________

* Country: __________________________ E-mail address: ___________________________________________

* Phone # (include area code): ___________________________ Fax #: __________________________________

PRODUCT INFORMATION

* MODEL * SERIAL # * PURCHASE DATE

e.g. IT8000, CDi1000, PCC160 e.g. 8000000000 mo/day/yr

________________________________ ____________________ ______ /_____ /_____

________________________________ ____________________ ______ /_____ /_____

________________________________ ____________________ ______ /_____ /_____

________________________________ ____________________ ______ /_____ /_____

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

Comments: ____________________________________________________________________________________

_____________________________________________________________________________________________

_____________________________________________________________________________________________


page 57

THIS PAGE INTENTIONALLY LEFT BLANK


page 58


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#: __________________________________ COD

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

Credit card information:

Type of credit card:

MasterCard Visa American Express Discover

Type of credit card account: Personal/Consumer 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: __________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

Crown Audio I-T12000 HD Stereo Amplifier Operation Manual

I-Tech HD Series

PRELIMINARY

Operation Manual

FCC COMPLIANCE NOTICE

page 2

DECLARATION of CONFORMITY

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

page 3

page 4

1,800W

2,000W

1,250W

3,600W

4,000W

2,500W

3,000W

1,500W

5,000W

6,000W

3,500W

4,000W

2,100W

7,000W

8,000W

page 5

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page 7

page 8

page 9

page 10

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MENU TREE

Exit

Attenuation - Mute - Lockout

Menu button

ALL MENUS: Next/Previous loops

Sample Rate

Analog Input Sensitivity

Presets

Amp Mode

Locate

Next

ADVANCED MENU

Next

(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

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

Prev to

Cobranet

Menu

Exit

Exit

Next