Crown VRack 12000HD Manual
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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
Ā®
.
©2011 by Harman International. 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000.
Operation Manual
142483-1 - 5/11

Operation Manual
page 2 page 3
Operation Manual
DECLARATION OF CONFORMITY
Issued By: Harman International.
1718 W. Mishawaka Rd.
Elkhart, IN 46517 U.S.A.
FOR FIELD SERVICE
QUESTIONS CALL: 1 800 342 6939
European Representativeās Name and Address:
David J. Budge
10 Harvest Close
Yateley, GU46 6YS
United Kingdom
Equipment Type: Commercial Audio Power Ampliļ¬ers
Family Name: ITECH-HD
Model Names: VRack
EMC Standards:
EN 55103-1:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audiovisual 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 & Amd 1: 2008 Limits for Harmonic Current Emissions (equipment input current ā¤16A per phase)
EN 61000-3-3:1998 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current ā¤16A
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, Audiovisual 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
Safety Standard:
IEC 60065: 2001: 7Ed & Amd 1: 2005 Safety Requirements - Audio Video and Similar Electronic Apparatus
I certify that the product identiļ¬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 ______________________
Scott Potosky
Title: Director of Engineering ______________________________________________________________________Date of Issue: February 1, 2010
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
manufacturerās instructions.
8. Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including ampliļ¬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 ļ¬t into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched, particularly
at plugs, convenience receptacles, and the point where they exit from
the apparatus.
11. Only use attachments/accessories speciļ¬ed by the manufacturer.
12. Use only with a cart, stand, tripod, bracket, or table speciļ¬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 qualiļ¬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 normally, or has been dropped.
15. Use the mains plug to disconnect the apparatus from the mains.
16. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO
NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
17. DO NOT EXPOSE THIS EQUIPMENT TO DRIPPING OR SPLASHING
AND ENSURE THAT NO OBJECTS FILLED WITH LIQUIDS, SUCH AS
VASES, ARE PLACED ON THE EQUIPMENT.
18. THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL REMAIN
READILY OPERABLE.
TO PREVENT ELECTRIC SHOCK, DO NOT REMOVE TOP OR BOTTOM
COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
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.
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.
IMPORTANT
VRacks require Class 2 output wiring.
MAGNETIC FIELD
CAUTION! Do not locate sensitive high-gain equipment such as
preampliļ¬ers or tape decks directly above or below the unit. Because this
ampliļ¬er has a high power density, it has a strong magnetic ļ¬eld which can
induce hum into unshielded devices that are located nearby. The ļ¬eld is
strongest just above and below the unit.
If an equipment rack is used, we recommend locating the ampliļ¬er(s) in
the bottom of the rack and the preampliļ¬er or other sensitive equipment at
the top.
Important Safety Instructions
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 modiļ¬cations not expressly approved by the
party responsible for compliance could void the userās 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 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.

Operation Manual
page 4 page 5
Operation Manual
Features .........................................................................................................................................................................5
Setup .........................................................................................................................................................................6
VRack Power Distribution Overview .........................................................................................................................................9
I-Tech HD Ampliļ¬er Speciļ¬cations .........................................................................................................................................12
Input Panel .......................................................................................................................................................................15
Input Wiring Modes..............................................................................................................................................................16
Analog .......................................................................................................................................................................16
Digital .......................................................................................................................................................................21
Hybrid .......................................................................................................................................................................24
Network Wiring Schematic ................................................................................................................................................. 26
VDrive .......................................................................................................................................................................27
Output Panel .......................................................................................................................................................................28
Output Wiring Modes ........................................................................................................................................................... 29
HiQnet⢠Software ................................................................................................................................................................ 38
System Diagrams .................................................................................................................................................................43
Product Registration ............................................................................................................................................................51
Crown Audio Factory Service Information ......................................................................................................................53
The VRack is comprised of a rugged touring rack ļ¬tted with three Crown IT12000HD ampliļ¬ers, a power input panel, and
custom engineered input and output panels. The input panel is mounted at the top rear and supplies CobraNet(TM) network
connections as well as AES/EBU and analog XLR connections. The output panel on the bottom rear of the rack offers 12
Speakon outputs: 3 x 2-way NL4 outputs, 6 x 1-way NL4 outputs, and 3 x 3-way NL8 outputs. The front-mounted power panel
includes a 5-pin Hubbell Twist-Lock connector and a 5-pin CEE-Form connector.
Because the VRack is supplied with all components installed and internally connected, there is no need for laborious rack
building; no chance that a component might be impropery connected; and a dramatically lower chance of connection failure.
The VRack is best thought of not as just an amp rack, but as a building block for your system. Every time you add 1 VRack
into a system, you are adding 1 block that powers a proper 3:2 ratio of tops and subs for optimal performance, and seamlessly
integrates into your system via analog or digital connections.
Each IT12000HD has 2 channels, each one capable of 2100 watts into 8 ohms and 4500 watts into 4 ohms. The input and
output panels are both engineered by Crown to give the VRack user optimum ļ¬exibility when deploying a VRack system
for powering VerTec fullsize (VT4889), midsize (VT4888), compact (VT4887A), subcompact (VT4886) models, companion
subwoofers (VT4880, VT4880A, VT4881A, VT4882, VT4883), and the latest JBL VTX and STX800 models.
The input panel automatically buffers AES signals, reducing or eliminating the need for digital distribution ampliļ¬ers. Through
VDrive (pg.27), the user is able to run Ethernet control and AES digital audio over a single Cat5 which jumps from rack to rack.
The output panel is designed to offer easy conļ¬guration for a variety of PA systems. It gives the ability to run tops off NL8
and subs off NL4s, monitors or ļ¬lls off 2-way NL4 outputs, or for VT4887A/VT4881A and VT4886/VT4883 systems, an entire
circuit of tops+subs off a single NL8. See pg.28 for output panel and a summary of wiring conļ¬gurations.
VRack is manufactured and tested to a single meticulous standard, and then shipped around the world. This means that any
time you supply or cross-rent a VRack it is the same as every other VRack in the world.
⢠3 IT12000HD ampliīers
⢠Fully assembled package from one source
⢠Worldwide power distribution with both L21-30 and 32A CEE-Form connections
⢠Flexible input panel with Analog, AES, and VDrive
⢠Versatile output panel
⢠Fail-over AES and network connection
⢠Rear rack lighting
⢠VDrive AES digital distribution over CAT5
⢠Built-in network control
⢠Built-in captive suspension
⢠Shock-mounted rack
⢠Removable dolly board
⢠Side-storing rack doors
⢠Entire package is UL/CSA/ETL
⢠HiQnet⢠control
Welcome
Features
Table of Contents
Product Specifications
Brand: | Crown |
Category: | Receiver |
Model: | VRack 12000HD |
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