Crown I-Tech 4x3500HD DriveCore Series Operation Manual
Operation Manual
Product Registration: Register your new product at http://warranty.harmanpro.com.
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 or
www.crownaudio.com.
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.
©2015 by Harman International, 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000
I-Tech 4x3500HD DriveCore™ Series
5059136
4/15
Some models may be exported under the name Amcron.
®
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 2
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 3
DECLARATION of CONFORMITY
Harman International
Sue Whiteld
sue.whiteld@harman.com
Representative’s Name and Address:
David Budge
10 Harvest Close
Yateley, GU46 6YS
United Kingdom
Equipment Type: Commercial Audio Power Ampliers
Family Name: I-Tech HD
Model Names: I-TECH4x3500S HD and I-TECH4x3500B HD
EMC Standards:
EN 55103-1:2009 EMC Compatibility – Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions
EN 55103-1:2009 Magnetic Field Emissions-Annex A @ 10 cm and 20 cm
EN 61000-3-2:2006 Limits for Harmonic Current Emissions (equipment input current less than or equal to 16A
EN 61000-3-3:2008 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply systems Rated Current less than or equal to 16A
EN 55022:2010 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated & Conducted, Class B Limits
EN 55103-2:2009 EMC Compatibility – Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity
EN 61000-4-2:2008 Ed 2.0 EMC Compatibility – Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity
EN 61000-4-3:2010 Ed 3.2 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A)
EN 61000-4-4:2007 Radiated, Radio-Frequency, EMC Immunity (Environment E2, Criteria A)
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
Safety Standard:
IEC 60065:2001 Ed 7 +A1:2005 Safety Requirements – Audio, Video, and Similar Electronic Apparatus
CAN/CSA 60065-03 incl. A1 Safety Requirements – Audio, Video, and Similar Electronic Apparatus
UL Std No. 60065-2007 Safety Requirements – Audio, Video, and Similar Electronic Apparatus
I certify that the product identied above conforms to the requirements of the EMC Council Directive 2004/108/EC and the Low Voltage Directive 2006/95/EC.
Signed
Title: Sr. Director of Operations
Terry Davenport
Date of Issue: February 1, 2012
ISSUED BY: Harman International
1718 W. Mishawaka Road
Elkhart, Indiana 46517 U.S.A.
Due to line current harmonics, we recommend that you contact your supply authority before connection.
FOR COMPLIANCE QUESTIONS ONLY:
The I-Tech Series ampliers are certied only
at 120V in Canada.
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 ampliers)
that produce heat.
9. Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades with
one wider than the other. A grounding-type plug has two
blades and a third grounding prong. The wide blade or
the third prong is provided for your safety. If the provided
plug does not t into your outlet, consult an electrician for
replacement of the obsolete outlet.
Important Safety Instructions
MAGNETIC FIELD
CAUTION! Do not locate sensitive high-gain equipment such as pre-
ampliers directly above or below the unit. Because this amplier has a
high power density, it has a strong magnetic eld which can induce hum
into unshielded devices that are located nearby. The eld is strongest
just above and below the unit.
If an equipment rack is used, we recommend locating the ampliers)
in the bottom of the rack and the preamplier or other sensitive equip
-
ment at the top.
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.
WATCH FOR THESE SYMBOLS:
IMPORTANT
I-Tech Series ampliers require Class 2 output wiring.
Les amplicateurs de série de I-Tech exigent des câbles de sortie de
classe 2.
I-Tech-Reihe-Verstärker verlangen Klasse die 2 Produktionsverdrahtung.
Los amplicadores de la Serie I-Tech requieren de un cableado de
sal ida Clase 2.
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 INTERIOR. 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.
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 modications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
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 equip
ment 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 com
munications. 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 recep
tion, 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.
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 specied by the manufac-
turer.
12. Use only with a cart, stand, tripod, bracket, or table specied
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 qualied 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.
Importantes Instructions de Sécurité
Wichtige Sicherheitsinstruktionen
Instrucciones de Seguridad Importantes
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 4
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 5
Table of Contents
1 Welcome
The Crown® I-Tech HD DriveCore Series offers
amazing power, light weight and ease of use for
touring sound applications. Unlike other
ampliers, it includes onboard high-denition
DSP, a 4.3” LCD screen, and a built-in network
connection.
Modern power ampliers 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 ampliers 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 amplier.
1.1 Features
• Global Power Supply with PFC (Power Fac tor
Correction) works anywhere in the world.
• High power density, up to 12,000 watts in a
2U chassis.
• Output voltage of 185Vpk provides clean
transient peaks.
• 6th-generation patented Class I (BCA® with
Drivecore Technology) cir cuitry couples power
efciently to the load and provides low AC
current draw.
• Onboard high-denition analog devices
Sharc
®
processor DSP with 24-bit, 192 kHz
SHARC A/D and D/A converters. Advanced IIR
lters and linear-phase FIR lters.
• Pushbutton presets simplify setup. Custom
presets for various loudspeakers can be
down loaded.
• AES3 digital audio input with V-Drive.
• EtherCon® Ethernet con nector for HiQnet™
control or CobraNet digital audio transport.
This “Single Plug” connection allows HiQnet
protocol and CobraNet digital audio, and
VDrive through the same CAT 5 cable.
• LCD Control Screen is used to adjust the
amplier’s attenuation and muting, congure
the amp, set up and view error monitoring, and
recall DSP presets to recongure 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
amplier DSP, and vice versa. This feature also
allows you to update the amplier’s rmware.
• Light weight due to aluminum chassis,
spe cial internal construction, switching power
supply and patented class-I output stage with
DriveCore Technology.
• 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,
high-frequency overloads and internal faults.
• Five-Year, No-Fault, Fully Transferable
Warranty completely protects your investment
and guarantees its specications.
1.2 How to Use This Manual
This manual provides you with the necessary
information to safely and correctly setup and
operate your amplier. It does not cover every
aspect of installation, setup or operation that
might occur under every condition. For
addi tional information, please consult the
online help in System Architect software,
Crown’s Amplifier Application Guide, I-Tech
Application Guide (available online at www.
crownaudio.com), Crown Technical Sup port,
your system installer or retailer.
We strongly recommend you read all
instruc tions, warnings and cautions contained
in this manual. Also, for your protection, please
send in your warranty registration card today.
And save your bill of sale — it’s your ofcial
proof of purchase.
I-T4x3500HD
2-ohm
2.7-ohm
4-ohm
8-ohm
4-ohm Bridge
8-ohm Bridge
70Vrms Direct
100Vrms Direct
20 Hz - 20 kHz
Minimum power in watts with 0.35% THD, all channels driven.
1,900W
2,100W
2,400W
1 kHz 20ms Burst
7,000W
6,000W
1,900W
3,500W
2,200W 3,800W
4,000W
4,200W
4,800W
2,100W
2,300W
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 Amplier ..........................................6
2.2 Connecting to AC Mains ........................................................7
2.3 Wire Inputs and Outputs .........................................................7
3 HARMAN GreenEdge - Going ‘Green’ ........................11
3.1 Going ‘Green’ ..........................................................................11
3.2 The Sound of Efciency ..........................................................11
3.3 Green Savings ........................................................................11
4 Integraded DriveCoreTM Technology ..........................12
5 Powered by Crown ..............................................13
6 Operation ........................................................14
6.1 Protecting Your Speakers .......................................................14
6.2 Startup Procedure ..................................................................14
6.3 Precautions ............................................................................14
6.4 Front Panel Controls and Indicators ........................................15
6.5 Back Panel Controls, Indicators and Connectors .....................16
7 Advanced Operation ............................................17
7.1 Introduction ............................................................................17
7.2 Operation Example ..................................................................18
7.3 Presets ...................................................................................27
7.4 List of Pop-Up and Descriptions .............................................28
7.5 Digital Audio Options (AES3 and VDrive) ................................29
7.6 Networking the Amplier .........................................................29
7.7 Software- Controllable Onboard DSI .......................................29
8 Troubleshooting ................................................44
9 Specications ...................................................46
10 AC Power Draw and Thermal Dissipation ..................50
11 Advanced Features ............................................51
11.1 Protection Systems ...............................................................51
11.2 Global Switching Power Supply with PFC .............................51
11.3 6th Generation Class I Circuitry ............................................51
11.4 Color-Coded Rear Overlay ....................................................51
12 Appendix A: Network and CobraNet Basics ................52
12.1 HiQnet Networks ...................................................................52
12.2 A Closer Look at CobraNet ....................................................52
13 LevelMAXTM Limiter Suite ....................................56
14 LevelMAX Limiters ............................................57
14.1 LevelMAX Peak Limiter .........................................................57
14.2 Peak Limiter Threshold (Vpk) ................................................57
14.3 Peak Limiter Attach (sec).......................................................57
14.4 Peak Limiter Release (sec) ....................................................57
14.5 Peak Limiter Look Ahead.......................................................57
14.6 Level MAX RMS Limiter ........................................................57
14.7 RMS Threshold (VRMS) .......................................................57
14.8 LevelMAX Tranducer Thermal Limiters .................................57
14.9 Thermal Voltage (VRMS) ......................................................57
14.10 Thermal Response Time (s).................................................57
15 Appendix B: Table of Parameters Modied by Each Mode
with LevelMAX ....................................................58
16 Application of FIR Filters to Loudspeakers Crossovers ..60
16.1 FIR Overview .........................................................................60
16.2 What are IIR Filters and FIR Filters? .......................................60
16.3 Pros and Cons of IIR and FIR Filters ......................................60
16.4 Desirable Attributes of FIR Filters ..........................................60
16.5 High Rolloff and Steep Slopes ...............................................61
16.6 Stop-band Attenuation ..........................................................61
16.7 FIR Polar Lobing Eror............................................................61
16.8 Crown’s Implementation of FIR Filters ...................................61
16.9 FFT Convolution ...................................................................61
16.10 Filter Design .......................................................................61
16.11 Low Latency 96 kHz Studio Quality Filters ...........................62
16.12 Measurements of Two-way Loudspeaker System ................62
16.13 FIR Measurements ..............................................................64
16.14 Conclusions .......................................................................65
17 Service ..........................................................66
17.1 International and Canada Service ..........................................66
17.2 US Service ............................................................................66
18 Warranty ........................................................67
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 6
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 7
2.1 Unpack and Install Your
Amplier
Please unpack and inspect your amplier 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 amplier (or a stable
surface for stacking)
WARNING: Before you start to set up
your amplier, make sure you read and
observe the Important Safety Instructions found at the beginning of this
manual.
CAUTION: Before you begin, make sure
your amplier 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 er
dimensions.
You may also stack amps without using a
rack.
NOTE: When transporting, ampliers should be
supported at both front and back.
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 amplier sides, and the back of
the rack should be a minimum of four inches
(10.2 cm) from the amplier back panel.
Figure 2.2 illustrates standard amplier airow.
2 Setup
Figure 2.2 Airow
Figure 2.1
Dimensions
MAGNETIC FIELD
CAUTION! Do not locate sensitive high-gain
equipment such as preampliers or tape decks
directly above or below the unit. Because this
amplier has a high power density, it has a
strong magnetic eld which can induce hum
into unshielded devices that are located nearby.
The eld is strongest on the right side and right
bottom of the amplier (facing the amplier).
If an equipment rack is used, we recommend
locating sensitive equipment at least 20 cm
(8 inches) away from the amplier.
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.
Ampliers do not create energy. The AC mains voltage and current must be
sufcient to deliver the power you expect. You must operate your amplier
from an AC mains power source with not more than a 10% variation above
or a 10% variation below the amplier’s specied line voltage range and
within the specied frequency requirements (indicated on the amplier’s
back panel label). If you are unsure of the output voltage of your AC mains,
please consult your electrician.
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 audio input cables together with 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 over driven.
THE CHANNEL 2 AND 4 INPUT IS IGNORED by default in Bridge Mono
mode. It can be summed using the input source selector.
For additional information on audio input wiring please refer to the Crown
Amplifier Application Guide available online at www.crownaudio.com. It
contains helpful information on preventing unwanted subsonic frequen cies,
radio frequency interference, ground loops, and feedback oscillation.
When using network connections, pass the CAT 5 cable ve times through
a ferrite core (Figure 2.4), available from Crown Audio Inc. This is to ensure
compliance with emission regulations.
2 Setup
Figure 2.3 Power Connector
1.5 In.
3.8 cm
3.5 In
.
8.9 cm
16.95 In.
43.1 cm
48.3 cm
19 In.
A
NAL
OG
INPUT
S
CH1
CH2
CH3
CH4
C
H
3
/4
CH
1/
2
DIG
ITAL INPUT AES3
N
ETWOR
K
COND.
DATA
PRESE
T
L
INK
/
ACT
.
O
UTPUT
S
CH1CH2
DUAL
BRIDGE
DUAL
CH3
CH4
BRIDGE
DUAL
DUAL
E
G
. U.
S
. PAT.
O
FF. 5,657,219
504
,
348 6
,
909
,
321 7
,
283
,
379
,557,
622
7,
9
1
9
,
998
7,77
8
,
32
4 7,5
2
1,
936
LA
SS
2
O
UTPUT WIRIN
G
I
-TECH 4x3500 | 2300
W
A
SSEMBLED IN USA
CAUTIO
N – TO REDUCE THE RI
SK
OF ELECTRIC SHOCK, GROUNDIN
G
MUS
T BE MAINTAINED.
32A Neutrik® powerCON
Figure 2.4 Pass the CAT 5 Cable Five Times Through the Ferrite Core
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 8
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 9
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 AES3 digital wiring. The use of standard analog cable
with AES3 will result in diminished performance. For best results,
110 ohm shielded twisted-pair cable for AES3 signals is highly
recommended. Figure 2.6 shows connector pin assignments for
unbalanced analog wiring.
If multiple connectors are needed for AES3 distribution from a
single AES3 source, the following shows the number of AES
connections in parallel based on AES3 switching frequency.
Frequency # of Connections
96kHz 4 AES3 Pairs
48kHz 8 AES3 Pairs
44.1kHz 8 AES3 Pairs
***Please note with good quality 110 ohm shielded digital cable,
it is possible to obtain a higher number of connections than stated
here. It is up to the user to test this based on their use case. The
connections stated here are based on worst case analysis.
NOTE: Custom wiring should only be performed by qualied
per sonnel.
2.3.3 Choose Output Wire and Connectors
Crown recommends using pre-built or professionally wired, highquality, two-, four-, or eight-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 amplier is
turned on and is passing a signal.
Using the guidelines below, select the appropriate size of wire
based on the distance from amplier 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
Figure 2.5
Balanced Analog Input Connector Wiring or
AES3 Digital Connector Wiring
Figure 2.6 Unbalanced Analog Input Connector Wiring
2 Setup
Figure 2.8
Binding Post Connections
Figure 2.7
Left: Speakon
®
Output Connector on Back Panel
Right: Speakon
®
Cable Connector
101-150 ft. 8 AWG
151-250 ft. 6 AWG
CAUTION: Never use shielded cable for output wiring.
2.3.4 Stereo Mode Wiring
Typical input and output wiring is shown in Figure 2.9.
IMPORTANT: Turn off the amplier and unplug its power cord.
INPUTS: Choose one of these options:
• Connect analog input wiring for all channels.
• Connect AES3 digital signal to the AES3 connectors.
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 this method:
2 Setup
Figure 2.10 Wiring Two Stereo Speakers
to the Top Speakon® Connector
PIN 1+ 1– 2+ 2–
CH 1+ 1– 2+ 2–
Stereo Wiring Method 1: Use Top Speakon® Only
Table 1
Channel 1
Loudspeaker
Channel 1
Loudspeaker
Channel 2
Loudspeaker
Figure 2.9
System Wiring,
2 x Stereo Mode
Channel 2
Channel 4Channel 3
Channel 1
Channel 1
AES 1+2
AES 3+4
Channel 2
Channel 3
Channel 4
ANALOG
INPUTS
CH1CH2 CH3CH4
CH
3/4
CH
1/2
DIGITAL INPUT AES3
NETWORK
COND.
DATA PRESET
LINK/
ACT.
I-TECH 4x3500 | 2300W
ASSEMBLED IN USA
CAUTION – TO REDUCE THE RISK
OF ELECTRIC SHOCK, GROUNDING
MUST BE MAINTAINED.
OUTPUTS
CH1CH2
DUAL
BRIDGE
DUAL
CH3CH4
BRIDGE
DUAL DUAL
REG. U.S. PAT. OFF. 5,657,219
6,504,348 6,909,321 7,283,379
7,557,622 7,919,998 7,778,324 7,521,936
CLASS 2 OUTPUT WIRING
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 10
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 11
Figure 2.12
Mono Wiring Using Both
Table 2
Speakon
®
Wiring for Bridge-Mono
PIN 1+ 2+
SPKR
+ –
PIN
3+ 4+
SPKR
+ –
2 Setup
Table 1 and Figure 2.10: Wire one Speakon® cable connector to two speakers. Insert
the Speakon® cable connector into the amplier’s top Speakon® connector.
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 amplier. Turn on the front-panel
power switch. The LCD Control Screen will light up.
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 the Encoder knob to select BRIDGE MONO. Press the knob again to conrm
your choice. Press Menu/Exit. Turn down both level controls (Encoder) until you
reach maximum attenuation.
4. IMPORTANT: Turn off the amplier and unplug its power cord.
INPUTS: There are three ways to connect an input signal to the amplier
(Figure 2.11):
• Connect an analog signal source to the Channel-1 and/or Channel-3 amplier
input.
• Connect an AES/EBU digital signal source to the Digital Input IN connector.
NOTE: Crown provides a reference of wiring pin assignments for commonly used
connector types in the Crown Amplifier Application Guide available at
www.crownaudio.com.
OUTPUTS: Use Class 2 output wiring. There are two ways to wire the amplier output
connectors for Bridge-Mono mode:
1) Wire the speaker across the red binding post channels 1/2 and 3/4 (Figure 2.11).
Do not use the black binding posts when operating in Bridge-Mono mode.
2) Wire the speaker only to the Speakon
®
connector as shown in Table 2 and Fig ure 2.12.
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. In this mode, the Channel 3 Level
control sets the level; the Channel 4 Level control is defeated.
ANALOG
INPUTS
CH1CH2 CH3CH4
CH
3/4
CH
1/2
DIGITAL INPUT AES3
NETWORK
COND.
DATA PRESET
LINK/
ACT.
I-TECH 4x3500 | 2300W
ASSEMBLED IN USA
CAUTION – TO REDUCE THE RISK
OF ELECTRIC SHOCK, GROUNDING
MUST BE MAINTAINED.
OUTPUTS
CH1CH2
DUAL
BRIDGE
DUAL
CH3CH4
BRIDGE
DUAL DUAL
REG. U.S. PAT. OFF. 5,657,219
6,504,348 6,909,321 7,283,379
7,557,622 7,919,998 7,778,324 7,521,936
CLASS 2 OUTPUT WIRING
Analog
AES
3 HARMAN GreenEdge -Going ‘Green’ without compromise
3.1 Going ‘Green’
Going ‘Green’ is no longer an option – it’s a necessity. Protecting the world
we live in against adverse climate change is a major objective of socially
responsible governments, businesses and individuals everywhere.
Reducing energy consumption is fundamental to the reduction of
greenhouse-gas emissions and is likely to impact various elements of our
lifestyle. Maintaining the quality of our lifestyle, while improving the
environment, is a challenge addressed by the HARMAN GreenEdge
advanced technology initiative.
HARMAN’s passion for innovative engineering remains dedicated to its
goal of acoustic excellence for all of its products. HARMAN’s loyal
customers never need to fear the loss of performance from going ‘Green’ –
in fact, the new range of GreenEdge audio systems enhance performance
and acoustic qualities. HARMAN continues to drive the importance of ‘the
listening experience’ while caring for the world we share.
3.2 The Sound of Efciency
HARMAN’s Research and Development teams are implementing highly
innovative engineering, design and manufacturing processes across its
range of world-class branded audio and infotainment products. The
GreenEdge technology initiative allows partners to take advantage of
Eco-Friendly, energy-saving benets such as:
Weight Savings -When compared to traditional, non-switching
ampliers, the I-Tech HD Series weighs an average of 50 lbs
(22.68kg) less. Less weight benets the consumer by reducing
shipping costs and benets the environment by reducing emissions
from vehicles because the shipper is able to either reduce the
amount of vehicles needed to transport the goods or the vehicle is
not running up to its weight limits resulting in less fuel economy.
High-Efciency Designs – The patented Universal Power
Supply with Power Factor Correction combined with the patented
Class-I PWM output stage of the I-Tech HD series ampliers
provides greater than 90% efciency when ran at 100VAC to
240VAC and all voltage in between.
Power Savings – The I-Tech HD Series has both manual and
automatic standby modes that put the amplier into a low AC current
draw state when not in use. When in this mode, the I-Tech HD series
draws an average of 100W of power greatly reducing your power
bills.
Environmental Responsibility – By integrating HARMAN
GreenEdge systems into your business model, you are promoting
Eco-Friendly energy saving initiatives and reducing your impact on
the enviorment.
3.3 Green Savings
Here’s an example of the energy savings offered by Crown’s Class-I
tour products:
Class-I Amplifiers v. MA5002VZ in Touring Applications
• If Crown shipped 13,500 IT4000/MA5000/IT5000HD
• If we had shipped 13,500 MA5002VZs in their place, the
numbers would look like this:
Electricity Savings:
• ~6,692,220 kWh
• Enough to power ~370 households annually!
Weight Savings (Freight):
• Reduces ~400 Metric tons of greenhouse gas annually
• About the same as taking 75 cars off the road
MA5002VZ
Class-I Tour Amp
(IT4000, MA5000i, IT5000HD)
Number of Units 13,500 13,500
Total Weight 519.8 tons 189 tons
1 hour of Electricity Usage 2.52kWh 1,602kWh
1 year of Electricity Usage 18,370,800 kWh 11,678,580 kWh
Figure 2.11
System Wiring,
2 x mono mode
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 12
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 13
4 Integrated DriveCoreTM Technology
Class D and Class I ampliers are notable for extraordinarily high
efciency and being well suited for driving difcult reactive loads such
as subwoofers.
Crown engineers developed DriveCore™ Technology – a proprietary
hybrid analog-digital integrated circuit (IC) developed with Texas
Instruments that drives the “front end” of the Class D or Class I output
stage. Over 60 years of Crown’s design knowledge and experience
went into the development of this technology resulting in truly
remarkable benets.
DriveCore™ Technology provides an extremely wide-tolerance with
regards to sagging or “dirty” AC line conditions providing consistent
performance without affecting audio quality. This means that your
performance will not be compromised by uctuating generator power
or overloading by lighting rigs, backline gear, etc.
In addition, DriveCore™ Technology’s patented feedback and PWM
modulation circuits enable fast recovery on peak transients, accurate
reproduction of low-level detail, and precise tracking of lowfrequencies at high power levels for maximum subwoofer output.
Figure 4.1 I-Tech HD 2 Channel Front End Board
Figure 4.2 Ruby Chip (Actual Size)
SN61112B5
07CYDJKL
5 Powered by Crown
This I-Tech HD Series amplier is compatible with the Powered by Crown
app. For more information visit:
http://www.crownaudio.com/mobileapplications/index.htm
iPad iPad
+ Instantly connect to your Crown networked amps; just plug
your amps into any wireless router, watch the amps
auto-populate, and you have full control of everything
+ Watch over your entire rig using your IPhone or IPad, anywhere
in the venue - intuitive control panels allow you to monitor input
levels, output levels, thermal conditions - anything you need
+ Need to limit control or see something special? Choose any
controls you want using System Architect custom panels; then
easily import them using ITunes
+ Use it with CTs, I-Tech, I-Tech HD, and Macro Tech I series (CTs
requires network PIP)
The New System Control App from Crown,
Available at the Apple App Store.
Input Signal GeneratorLOW MID HIGH
Level
s/Mut
e
Levels/Mute
Available right now, download instantly from the Apple App Store.
Visit crownaudio.com for more information
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 14
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 15
6.2 Startup Procedure
When rst turning on your amplier, follow the procedures in the
Quick-Start Guide on page 4 (stereo) or page 5 (bridge-mono).
If you ever need to make any wiring or installation changes, don’t for get
to disconnect the power cord.
For help with determining your system’s optimum gain structure
(sig nal levels) please refer to the Crown Amplifier Application Guide,
available online at www.crownaudio.com.
6.3 Precautions
Your amplier is protected from internal and external faults, but you
should still take the following precautions for optimum performance
and safety:
1. Before use, your amplier rst must be congured for proper
operation, including input and output wiring hookup. Improper
wiring can result in serious operating difculties. For information
on wiring and conguration, please consult the Setup section of
this manual or, for advanced setup techniques, consult Crown’s
Amplifier Application Guide available online at
www.crownaudio.com.
6 Operation
6.1 Protecting Your Speakers
It’s wise to avoid clipping amplier signals at the input and output. Not
only does clipping sound bad, it can damage loudspeakers. 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
amplier’s built-in DSP. That way, no matter how strong a signal your
mixer produces, the amplier output will not clip. Set the limiter
threshold so that at full level no components in the audio signal chain
are clipping, the amplier input and output is not clipping, and the
attached loudspeakers at properly protected according to the mnfg’s
rec’d specications.
Also, avoid sending strong subsonic signals to the amplier.
High-level, low-frequency signals from breath pops or dropped
micro phones can blow out drivers. To prevent subsonic signals, use
one of these methods:
• Insert a highpass lter between mixer output and amplier input (or
between mixer and limiter).
• Use the I-Tech’s onboard DSP to set up a highpass lters.
• Switch in highpass lters at your mixer. Set the lter to as high a
fre quency as possible that does not affect your program. For example,
try 35 Hz for music and 75 Hz for speech. On each mixer input channel,
set the lter frequency just below the lowest fundamental frequency of
that channel’s instrument.
• Note: An amplier reproduces the signal present on the input.
Therefore, if you send clipped or squared wave signals to the input, it
will recreate this on the output possibly damaging your loudspeakers.
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 amplier with the red Clip LEDs constantly
ashing.
7. Do not overdrive the mixer, which will cause clipped signal to be
sent to the amplier. Such signals will be reproduced with extreme
accuracy, and loudspeaker damage may result.
8. Do not operate the amplier with less than the rated load
imped ance. Due to the amplier’s output protection, such a
congura tion may result in premature clipping and speaker
damage.
9. CAUTION – SHOCK HAZARD: Potentially lethal voltages
exist at the output connectors when the amplier is
turned on and is passing a signal.
Remember: Crown is not liable for damage that results from
overdriv ing other system components.
6 Operation
Figure 6.1 Front Panel Controls and Indicators
6.4 Front Panel Controls and Indicators
Many of these functions can be disabled using
Blackout Mode (a selection in the Advanced
Menu, Section 7.2).
A. Cooling Vents
Front-to-rear forced airow through foam dust lter
B. LCD Display Screen
Integrated 4.3” color LCD with backlight, displays
amplier settings.
The LCD Display Screen and its controls let the user
adjust the amplier’s attenuation and muting,
con gure the amp, set up and view error monitoring
(such as temperature and load supervision), and
recall DSP presets.
C. Power Switch
Push-on/push-off switch glows green when AC
power is present at the power cord and the amplier
circuit breaker is in the “on” position.
D. USB 2.0 Connector
Accepts a USB drive to transfer presets, device les,
and update rmware from the drive to the amplier
DSP, and vice versa.
E. Fault Indicator
Red LED, one per channel, ashes when the
ampli er output channel has stopped operating.
Usually this means that the amplier 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 off during Blackout
mode.
H. Level Control (Encoder)
Speed-sensitive, 0.5 dB steps, range 0 to –100 dB.
This knob affect the Channel 1-4 output levels. Also
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 er’s
input and output signal levels. From top to bot tom
the LEDs are
–10 dB: amplier output is 10 dB below clipping.
–20 dB: amplier 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.
N. Power Indicator
Blue LED indicates amplier has been turned on and
AC power is available. The LED will 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 ashes only when the amplier 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 amplier is set to
Bridge-Mono mode.
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 16
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 17
H. Preset Indicator
LED 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.
I. Reset Button
To restore factory default settings: Press the Reset Button with a
thin, non-conductive object, then turn on amplier power, and
continue to hold the reset button until the Preset light comes
on green (approximately 16 seconds)..
J. Data Indicator
Flashes yellow only when the amplier is polled for data, or is
polled to see whether it is online.
DIGITAL INPUTS SECTION
K. AES/EBU Digital Input
This 3-pin female XLR connector accepts a dig ital signal in the
AES/EBU format.
6 Operation
Figure 6.2 Back Panel Controls and Connectors
6.5 Back Panel Controls, Indica tors
and Connectors
A. Fans
Provide front-to-back forced airow for cooling.
ANALOG INPUTS SECTION
B. Balanced Analog XLR Inputs
A 3-pin female XLR connector for each channel.
OUTPUTS SECTION
C. Speakon® Output Connectors
Two high-current, 50A Neutrik® Speakon® NL4MLP
(mates with NL4FC and NL4), for channels 1+2 or
3+4 and one NLT8 for channels 1 thru 4. 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
2 speakon connectors are wired each for stereo
operation off of one connector, the bottom NL8
speakon connection is for four way operation off
of one connector.
D. Binding Post Output Jacks
One pair per channel of high-current, 60A
color-coded binding posts. Accepts banana
plugs, wire or spade lugs.
E. Power Cord Connector
32 amp PowerCon
®
AC Inlet. Voltage range is
indicated above IEC inlet.
F. Reset Switch/Circuit Breaker
If the current draw of the amplier exceeds safe
limits, this breaker automatically disconnects
the power supply from the AC mains. The switch
resets the circuit breaker.
G. MAC Address
This specic amplier’s network identier that is
burned into its rmware.
It is not recommended to loop through more than four
ampliers. If larger distribution of AES is needed, the use of
an AES distribution ampli er is recommended.
NETWORKING SECTION
L. Link/Act Indicator
Shows net work activity.The LINK ACT LED illuminates when
the network port is connected and ashes when network
activity is detected.
M. Network Connector
This EtherCon
®
Ethernet connector is for networking.
Warning: Only connect to networks that remain inside the
building.
N. Cond Indicator
Turns on if the amplier 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.
ANALOG
INPUTS
CH1 CH2CH3 CH4
CH
3/4
CH
1/2
DIGITAL INPUT AES3
NETWORK
COND.
DATA PRESET
LINK/
ACT.
I-TECH 4x3500 | 2300W
ASSEMBLED IN USA
CAUTION – TO REDUCE THE RISK
OF ELECTRIC SHOCK, GROUNDING
MUST BE MAINTAINED.
OUTPUTS
CH1CH2
DUAL
BRIDGE
DUAL
CH3CH4
BRIDGE
DUAL DUAL
REG. U.S. PAT. OFF. 5,657,219 6,504,348 6,909,321
7,283,379 7,557,622 7,919,998 7,778,324 7,521, 936
CLASS 2 OUTPUT WIRING
OUTPUTS
CH1 CH2
CH3 CH4
CLASS 2 OUTPUT WIRING
7.1 Introduction
The LCD Display Screen and its controls let you congure the
ampli 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 Display Screen. That is done in System Architect.)
Figure 7.1 shows the parts of the LCD Display Screen. Its
functions are described below. NOTE: Listed functions can also be
controlled in System Architect.
Here’s how to access the various menus and settings in the LCD
Display Screen:
7 Advanced Operation
Figure 7.1 Parts of the LCD Control Screen
• Starting from the Attenuation screen, press Menu/Exit to go to
the Menu 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 the Encoder knob to change the value of a
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 previous
screen at any time.
Some menu items require conrmation: after you request a change,
the display might say “Press and hold.” To conrm a change, press
and hold the Encoder knob. If you don’t want the change to occur
during a conrmation, turn the knob or wait ve seconds.
The entire front panel or any 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”.
Next
Prev
ALL MENUS:
Next/Previous loops
PRESETS
Attenuation - Mute - Lockout
GENERAL PROPERTIES MENU
Sample Rate
Analog Input Sensitivity
Amp Mode
Locate
Channel Labels
Default Display View
Screen Configuration
LED Meter Display Type
Manufacturing Information
ADVANCED MENU
Attenuator Limits
Attenuator Link
Input Source Priorities Ch 1
Input Source Priorities Ch 2
Input Source Priorities Ch 3
Input Source Priorities Ch 4
Maximum Analog Input
AES Input Trim
AES Input Status
Bandpass Gain
Output Polarity
Input Delay
Driver Delay
Clip Limiter
Pink Noise Generator
Sweep Load Monitoring
LevelMax Suite Menu
Limiter States
Peak Voltage Limiter
RMS Voltage Limiter
Transducer Thermal Limiter
MONITOR MENU
Global Metering
Load Monitoring
Thermal Percentage
Thermal Temperature
AC Line Voltage
Operating Time
Watts Output
ALERTS MENU
Amp Output Clip Errors
Analog Input Clip Errors
Thermal Errors
Low/High Limit Load Errors
Sweep Load Monitoring Errors
Line Voltage Errors
Fan Errors
Clear All Error Logs
NETWORK CONFIGURATION MENU
Network Information
Manufacturing Information
HiQnet Node Address
Network Settings
COBRANET MENU
CobraNet Information
CobraNet Input Ch 1
CobraNet Input Ch 2
CobraNet Input Ch 3
CobraNet Input Ch 4
CobraNet Foldback
CobraNet Conductor Priority
CobraNet Transport Latency
CobraNet Input Trim
MENU TREE
Menu Button
Next
Exit
Exit ExitExit
Exit Exi
tE
xit
Next
Next
Next
Next
Next
Next
Figure 7.2 The Menu Tree
Menu Tree
As a handy reference, Figure 7.2 shows the menu structure of the LCD display screen. Starting from any Menu screen,
press an Encoder knob to go to the 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 previous screen.
Menu/Exit
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 18
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 19
7.2 Operation Examples
Operation Example 1
How to set the CH1 input sensitivity using the LCD Display
Screen:
1. After power-up, when the default display screen appears, press
Menu/Exit.
2. Press Next twice to reach the Advanced Menu, press the
encoder wheel to select.
3. Press Next once to reach the Analog Input Sensitivity menu,
then press the encoder wheel to select.
4. Press Next to reach the desired channel then press the encoder
wheel to select a channel and spin the encoder wheel to adjust the
dB gain for that channel, press Menu/Exit to deselect.
5. When nished, press and hold the Menu/Exit button to return
to the default display view.
Operation Example 2
How to monitor the Thermal Errors using the LCD Display Screen:
1. After power-up, when the default display screen appears, press
Menu/Exit.
2. Press Next four times to reach the Alerts Menu, press the
encoder wheel to select.
3. Press Next two times to reach the Thermal Errors menu, then
press the encoder wheel to select.
4. Press Next to reach a desired channel then press the encoder
wheel to clear errors on that channel, press Menu/Exit to
deselect.
5. When nished, press and hold the Menu/Exit button to return
to the default display view.
Now let’s look at the function of each menu selection.
7 Advanced Operation
Front Panel Lockout (in the Attenuation screen)
The amplier’s administrator can control access to menu mode and the
amplier’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 specic 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 specic parameter is protected, the
screen says “N/A” or “Change Disabled.”
Mute/Unmute (in the Attenuation screen)
• To mute a channel: The display will alternate between MUTE and the
attenua tion level. While the amplier is muted, you can adjust
attenuation for each channel by using Next and pressing the encoder
wheel to select and turning the Encoder knob.
• To unmute either channel: Press and hold the encoder wheel for 1
second.
Opening Screen: On power-up, the LCD Display Screen dis plays the
Crown logo. After a few seconds, the rmware version appears, then the
Attenuation screen appears.
Attenuation and Bar Meters
This screen dis plays the attenuation in dB. To change atten uation press
Next to reach the desired channel then press the encoder wheel to
select that channel and 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.
If the attenuators for both channels are linked (in the Attenuator Link
screen, described later), the word LINK appears. (If there is an error in
the error log, an exclamation point appears at bottom center.)
7.2.1 Basic Selections
Presets: A preset is a group of DSP and amplier 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 conrm. For
more information on presets, see Section 7.3.
The preset currently in use is displayed in the upper right corner.
(A) Active means that the amplier is operating exactly according to that
preset.
(M) Modied means that the amplier is operating according to the preset
but with some settings changed.
If a preset number is ashing, it is not in use.
In the example shown below,
• Preset 2 is in use.
• The amplier settings have been modied (M) since Preset 2 was loaded.
7 Advanced Operation
Sample Rate: Starting from the Attenuation screen, press Menu/Exit to go
to the Sample Rate screen in the advanced mode. The sample rate of the
amplier’s DSP is displayed. It can be modied only in System Architect
software because FIR lter settings will need to be recalculated as a result of
the change. Please refer to its Help les. When you route a Cobranet input, the
sample rate displayed here must match the Cobranet source.
Analog Input Sensitivity: (Use Next and press encoder wheel to select a
channel, turn the encoder to adj.)
This screen also displays the amp gain for each channel resulting from the
sensitivity settings.
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/pdf/amps/137327.pdf.
Amp Mode: This screen lets you set up the amplier 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
conrm your choice. The LCD screen displays the currently selected mode.
• In Dual (or Stereo) mode, both channels operate independently.
• In Bridge Mono mode, pairs of channels are summed to double the power,
and the amplier puts out a mono signal.
Locate: Allows users to identify a specic amplier in a large network of
ampliers 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 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.
Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 20
I-Tech HD DriveCore Series Power Ampliers
Operation Manual
page 21
7 Advanced Operation
Input Sources: For each channel, turn the Encoder to select ana log, digital,
or CobraNet Options are:
Analog
Digital
Digital with analog backup
Digital with analog override
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.
Maximum Analog Input: Use Next and press the encoder wheel to select:
+21 dBu or +15 dBu. Note: Changing this value changes the range of
sensitivities available to the amplier.
For more information see Figure 7.3 and the I-Tech Sensitivity Charts in the
Appendix of the I-Tech Application Guide. It is available online at www.
crownaudio.com/pdf/amps/137327.pdf.
7 Advanced Operation
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.
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 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.
AES Input Trim: Turn the Encoder knob to vary the gain of the AES digital
signal for Channel 1: -100.0 dB to +20 dB. See Figure 4.4 for more
information.
AES Input Status: “Lock” indicates that an AES cable is plugged in and the
amplier is receiving (and locking to) the AES phase logs logs. “No Lock”
means that the amplier is not receiving, or is not locking to the AES
clock pulse.
CobraNet Input Trim: Turn the Encoder knob to vary the gain of the
CobraNet digital signal for Channel 1: -100.0 dB to +20 dB. See Figure 4.4 for
more information.
Input Delay: Sets the input signal delay in each channel. Turn the 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.
Output Polarity: Use Next and press the encoder wheel to select each
channel icon to toggle the output signal polarity between + and –.
Bandpass Gain: In each channel of the I-Tech HD’s DSP, just before the
output limiter and after the preceding 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.
Output Delay: Sets the output signal delay in each channel. Turn the 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.
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