Crown Audio I-T12000 HD, I-T9000 HD, I-T5000 HD User Manual

PRELIMINARY

Operation Manual

I-Tech HD Series

I-T5000 HD

I-T9000 HD

I-T12000 HD

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

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

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

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

Some models may be exported under the name Amcron.

©2008 by Crown Audio® Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: [phone]

®

140811-1
12/08

I-Tech HD Series Power Amplifi ers

Important Safety Instructions

Importantes Instructions de Sécurité

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

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

8. Do not install near any heat sources such as radiators, heat
reg isters, stoves, or other apparatus (including 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.

Wichtige Sicherheitsinstruktionen

Instrucciones de Seguridad Importantes

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

À PRÉVENIR LE CHOC ÉLECTRIQUE N’ENLEVEZ PAS LES
COUVERCLES. IL N’Y A PAS DES PARTIES SERVICEABLE
À L’INTÉRIEUR. TOUS REPARATIONS DOIT ETRE FAIRE PAR
PERSONNEL QUALIFIÉ SEULMENT.

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

TO COMPLETELY DISCONNECT THIS EQUIPMENT FROM THE
AC MAINS, DISCONNECT THE POWER SUPPLY CORD PLUG
FROM THE AC RECEPTACLE. THE MAINS PLUG OF THE POWER
SUPPLY CORD SHALL REMAIN READILY OPERABLE.

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

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

WATCH FOR THESE SYMBOLS:

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

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

REGARDEZ CES SYMBOLES:

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

ATENCION CON ESTOS SÍMBOLOS:

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

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

The I-Tech Series 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

I-Tech HD Series Power Amplifi ers

Crown International, Inc.

ISSUED BY: Crown International, Inc.

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

European Representative’s Name and Address:

David Budge
10 Harvest Close
Yateley GU46 6YS
United Kingdom

Equipment Type: Commercial Audio Power 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

DECLARATION of CONFORMITY

FOR COMPLIANCE QUESTIONS ONLY:

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

Title: Senior Vice President of Manufacturing

Operation Manual

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

Date of Issue: November 1, 2008

page 3

Table of Contents

I-Tech HD Series Power Amplifi ers

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

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

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

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

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

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

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

2.1 Unpack and Install Your 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

Operation Manual

I-Tech HD Series Power Amplifi ers

20 Hz - 20 kHz

I-T5000HD

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

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

Power

1,800W
2,000W
1,250W
3,600W
4,000W

1 Welcome

I-T9000HD

20 Hz - 20 kHz

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

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

2,500W
3,000W
1,500W
5,000W
6,000W

20 Hz - 20 kHz

I-T12000HD

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

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

Operation Manual

3,500W
4,000W
2,100W
7,000W
8,000W

Power

Power

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
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.

Ethernet con nector for HiQnet™

• 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

I-Tech HD Series Power Amplifi ers

2.1 Unpack and Install Y our
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.

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.

page 6

19 In.

48.3 cm

16.2 In.

41.1 cm

Figure 2.1

Dimensions

3.5 In.

8.9 cm

Figure 2.2 Airfl ow

1.5 In.

3.8 cm

Operation Manual

I-Tech HD Series Power Amplifi ers

2 Setup

2.2 Connecting to AC Mains

WARNING: The third (ground) prong of the supplied AC power
cord connector is a required safety feature. Do not attempt to
disable this ground connection by using an adapter or other
methods.

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.

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.

Slot

Operation Manual

Slot

IEC Power Connector

Figure 2.3 IEC Power Connector Clip

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

Clip

page 7

2 Setup

2.3.2 Choose Input Wire and Connectors

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

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

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

NOTE: Custom wiring should only be performed by 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 2.7
Left: Speakon
Right: Speakon

®

Output Connector on Back Panel

®

Cable Connector

I-Tech HD Series Power Amplifi ers

Figure 2.6 Unbalanced Analog Input Connector Wiring

page 8

Figure 2.8

Binding Post Connections

Operation Manual

I-Tech HD Series Power Amplifi ers

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
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.

connectors, use one of these

Figure 2.9

System Wiring,

Stereo Mode

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 T op Speakon

Operation Manual

Table 1

®

Connector

Channel 2
Loudspeaker

Enceinte du
Canal 2

Lautsprecher
Kanal 2

Altoparlante
del Canal 2

Table 2

Stereo Wiring Method 2: Use Both Speakon®s

PIN 1+ 1–

Top

CH 1+ 1–

Bottom

PIN 1+ 1–

CH 2+ 2–

Channel 1
Loudspeaker

Bottom
Speakon
(Channel 2)

Top Speakon
(Channel 1)

Channel 2
Loudspeaker

Figure 2.11
Stereo Wiring
Using Both
Speakon

®

Connectors

page 9

2 Setup

2.3.5 Bridge-Mono Mode

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

1. Be sure that no cables are connected to the 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

I-Tech HD Series Power Amplifi ers

Figure 2.13 Bridge-Mono Wiring to Binding Posts

page 10

Menu/Exit Prev Next

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

Table 3

Top Speakon® Wiring for Bridge-Mono

PIN 1+ 2+

SPKR

+–

Figure 2.14
Wiring a Speaker in Bridge-Mono Mode to
the T op Speakon

®

Connector

Operation Manual

I-Tech HD Series Power Amplifi ers

3 Operation

3.1 Protecting Y our 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.

Operation Manual

page 11

3 Operation

I-Tech HD Series Power Amplifi ers

3.4 Front Panel Controls and Indicators

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

A. Cooling Vents

Front-to-rear forced 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.

C. Power Switch

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.

E. Fault Indicator

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.

F. Thermal Indicator

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

G. Clip Indicator

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

H. Level Controls (Encoders)

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

I. Menu/Exit Button

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

J. Prev Button

Selects the previous item in the menu.

K. Next Button

Selects the next item in the menu.

L. Signal Indicators

These can be disabled during Blackout mode. Three
green LEDS per channel indicate the ampli 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.

N. Power Indicator

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.

O. Data Indicator

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.

P Bridge Mode Indicator

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

page 12

Figure 3.1 Front Panel Controls and Indicators

Operation Manual

I-Tech HD Series Power Amplifi ers

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

®

connectors. See Figures 2.5 through

Speakon

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.

Operation Manual

Figure 3.2 Back Panel Controls and Connectors

page 13

4 Advanced Operation

I-Tech HD Series Power Amplifi ers

4.1 Advanced Operation T able 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

Operation Manual

I-Tech HD Series Power Amplifi ers

4 Advanced Operation

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”.

Operation Manual

MENU TREE

Attenuation - Mute - Lockout

Menu button

Sample Rate

Analog Input Sensitivity
Presets
Amp Mode
Locate

Next

ADVANCED MENU

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

Exit

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

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

Next

ALL MENUS: Next/Previous loops

Prev to

Cobranet
Menu

Level
Max
Suite

Next

Prev

MONITOR MENU

(press knob once to access
these items:)

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

Exit

NETWORKING MENU

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

Exit

Figure 4.2 The Menu Tree

Next

Next

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.

ALERT MENU

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

Exit

Line Voltage Errors
Fan Errors
Clear All Error Logs

COBRANET MENU

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

Exit

Next

Next

To
Sample
Rate

page 15

4 Advanced Operation

Powered By

Attenuation Default (M)

Attenuation Default (M)

I-Tech HD Series Power Amplifi ers

Operation Examples

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

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

Menu/Exit.

2. Press Next.

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

4. Press Menu/Exit.

Operation Example 2

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

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

Menu/Exit.

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

3. Push an Encoder knob.

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

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

6. Press Menu/Exit.

Operation Example 3

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

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

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

3. Push an Encoder knob.

4. Press Next until you see “Thermal Errors.

4.2.2 Basic Selections

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

Powered By

Powered By

(Power On) 1.0.0.5

Attenuation and Bar Meters

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

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

Attenuation Default (M)

-30.0

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.

Attenuation Default (M)

-30.0

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.”

dB

MUTE

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

page 16

Operation Manual

I-Tech HD Series Power Amplifi ers

Sample Rate

Modify in software ONLY!

Analog Input Sensitivity

Amp Mode

Presets Preset7 (M)

Presets Preset 7(A)

Advanced Menu

Locate

4 Advanced Operation

Sample Rate: Starting from the Attenuation screen, press Menu/Exit to go
to the Sample Rate screen. The sample rate of the 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.

Sample Rate

96 kHz

Modify in software ONLY!

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

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

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

Analog Input Sensitivity

2.90

2.90

31.5

Vrms

dB Gain

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.

Presets Preset7 (M)

Preset7
CH1:MF-1&2

7

CH2:MF-3&4

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

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

• Preset 7 is active (A). That means the 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.”

Presets Preset 7(A)

Preset7
CH1:LF-1&2

5

CH2: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.

Amp Mode

<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.

Locate

OFF

Press enc to toggle

4.2.3 ADVANCED MENU

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

Operation Manual

Advanced Menu

Advanced Menu

Push knob for adv. menu

page 17

4 Advanced Operation

Attenuator Limits

dB

Attenuator Link

Tur n to Set -P res s to Sa ve

Input Sources

Analog Source Select

Maximum Analog Input

Tur n to Set -P res s to Sa ve

Digital Source Select

AES Source Select

AES Input Trim

AES Input Status

Cobranet Source Select

Cobranet Input Trim

I-Tech HD Series Power Amplifi ers

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

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

Attenuator Limits

0.0

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

Attenuator Link

INDEPENDENT

Turn to Set-Press to Save

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

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

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

Input Sources

<Analog> <Digital>

dB

0.0

Analog Source Select: Turn the left Encoder knob to select Analog 1,
Analog 2, or Analog 1+2 signals for Channel 1. The right Encoder does the
same for Channel 2. Press the knob to 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 Source Select

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.

Maximum Analog Input

Turn to Set-Press to Save

+15dBu

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

2. Press the knob to confi rm your choice.

Digital Source Select

AES

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

<Cobra

net>

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

AES Input Trim

0.0

AES Input Status: “Lock” indicates that an AES cable is plugged in and the
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.

AES Input Status

No Lock

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

Cobranet Source Select

Cnet 1

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

Cobranet Input Trim

0.0

dB

dB

0.0

Cnet 2

0.0

page 18

AES Source Select

AES

1

AES

2

Operation Manual