Crest Audio PRO SERIES 10004 User manual

Power Specifications 8ΩStereo (x4 ch.) 4ΩStereo (x4 ch.) 2ΩStereo (x4 ch.) 8ΩBridged (x2 ch.) 4ΩBridged (x2 ch.)
1kHz, 0.02% THD+N 750W 1225W 1400W 2450W 2800W
20Hz-20kHz, 0.1% THD+N 720W 1200W 1400W 2400W 2800W
Figures are Watts per channel, all channels driven.
Product Description
The Crest Audio 10004 is a four-channel, high-power amplifier
designed to meet the most demanding needs of the sound profes-
sional. By providing 1400 watts at 2 ohms from each of the
amplifier’s four channels, this four rack-space unit offers sub-
stantial power and versatility in a compact package.
Crest Audio’s Power Density™engineering design philosophy
allows the 10004 to have one of the highest power-to-weight
ratios available at any price, while maintaining superior perfor-
mance. Forced-air is employed to cool channel heat sinks mount-
ed in a back-to-back tunnel configuration. Stereo, parallel, and
bridged mono modes are chosen with two rear-panel Mode Select
switches. Actively balanced XLR input connections and 5-way
output binding post connectors are provided for each channel.
The 10004 is fully compatible in design with the other Crest
Audio Professional Series amplifiers, Octal Socket Accessories,
and the NexSys®computer-controlled audio system.
Design and Construction
The 10004 is built exclusively in Crest Audio’s own USA manu-
facturing facility, with internal components selected for premium
quality and proven durability. Each modular subassembly is pre-
tested, and the assembled 10004 receives a rigorous “hot room”
burn-in before thorough final checkout on precision test equip-
ment.
The no-compromise approach in the 10004’s electrical design
and mechanical construction provides the ultimate in reliability
and performance. Only high-grade components are used for the
modular sub-assemblies in this ultra-strong, 12 ga. steel single
piece chassis.
10004 Features
• Crest Audio’s legendary “overbuilt” power supply
• Toroidal power transformers
• Latest generation of high-speed, wide-bandwidth output
devices
• Tunnel cooling with back-to-front air flow
• Variable speed DC fan
• High thermal mass heat sinks
• Balanced XLR inputs
• 5-way binding post output connectors
• Stereo/Parallel/Bridged Mono mode selector switches
• Rear panel ground lift jumpers
• 10004 protection circuitry:
- Clip Limiting prevents speaker damage with gentle gain
reduction at clip threshold.
- IGM (Instantaneous Gain Modulation) monitors connected
loads to detect conditions that may overstress output
devices, allowing safe operation into nominal 2Ωimped-
ances.
- AutoRamp gradually increases gain to attenuator setting
level when amplifier is turned on.
- Other protection circuitry: comprehensive thermal manage-
ment, and short circuit, DC voltage, turn-on/off transient,
current inrush and sub/ultrasonic input protection.
• Recessed, stepped attenuators
• Front panel circuit breaker/power switches
• Modular construction
• Full five-year warranty
(USA, Canada, U.K. & many other countries).
10004
POWER AMPLIFIER
®Crest Professional Series
Amplifiers are fully
compatible with the NexSys
Computer-Controlled
Audio system.

1kHz, <0.02% THD+N 20Hz-20kHz, <0.1% THD+N
750W 720W
1225W 1200W
2450W 2400W
1400W 1400W
2800W 2800W
91V
137V
20 Hz-20 kHz, -3dB @ 53kHz
20 Hz-20 kHz, +0/-0.2dB
Clip Limit, IGM, AutoRamp, High Temp, short-circuit,
DC voltage, turn-on/off transient, sub/ultrasonic input.
<0.02%
0.06%
600:1
>60 dB
1.7V RMS
X40
>20kΩ
> -100 dB
> -60dB
H
Female XLR (pin 3+), Octal Socket
5-way output binding posts
168,000 µF per channel
100V-240V, 50-60Hz
1.6A per line cord
10.8A per line cord
21.8A per line cord
35.6A per line cord
3380 BTU/hr
6140 BTU/hr
Rear to front tunnel, 2 speed DC fan, 235 CFM max
Front panel: 4 attenuators, 2 circuit breaker /power switches;
Rear panel: 2 mode switches, signal ground lift jumper
Clip/Limit, Signal, Temp/DC, Active
12 ga. steel chassis, .093" (2.5mm) aluminum front panel
7" x 19" x 20.5" (19.5" to end of rear ears);
178mm x 483mm x 521mm (496mm to back of rear ears)
145 lbs (65.83 kg.), 137 lbs (62.20 kg.)
5 years, parts and labor†
8ΩStereo Power (x4 ch.)
4ΩStereo Power (x4 ch.)
8ΩBridged Mono Power (x2 ch.)
2ΩStereo Power (x4 ch.)
4ΩBridged Mono Power (x2 ch.)
Max RMS Output Voltage (each channel)
Peak Output Voltage (each channel)
Frequency Response (+0 / -0.3dB, 1W/8Ω)
Power Bandwidth (rated power at 4Ω, 1% THD+N)
Protection Circuitry
THD+N (rated power at 4Ω, 1kHz)
SMPTE IMD (rated power at 8Ω, 60Hz & 7kHz)
Damping Factor (10-400Hz at 8Ω)
Input CMRR (1kHz)
Input Sensitivity (rated power at 4Ω)
Voltage Gain
Input Impedance (balanced)
Hum and Noise (“A” weighted, full power, 4Ω)
Crosstalk (“A” weighted, full power, 4Ω)
Class
Input Connectors (per channel)
Output Connectors (per channel)
Filter Storage
Power Supply (factory configured)
Idle Current Draw (120V)
1/8 Power Curr. Draw (typical music, 120V/4Ω)
1/3 Power Curr. Draw (continuous music, 120V/4Ω)
Max Curr. Draw (circuit breaker rating, 120V/4Ω)
Thermal Emissions (1/8 Power, 4Ω)
Thermal Emissions (1/3 Power, 4Ω)
Cooling
Controls
LED Indicators (per channel)
Construction
Dimensions (Height x Width x Depth)
Gross Weight, Net Weight
Warranty
† USA, Canada, U.K., and many other countries. Power figures are watts per channel, both channels driven. Crest Audio reserves the
right to make improvements in manufacturing or design which may affect specifications. Crest Audio specification literature is avail-
able in downloadable PDF file format; visit our website at http://www.crestaudio.com. ©1997 Crest Audio Inc. 5/21/97
v. 2.5 10/15/97 B5000011
Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
TEL: [phone] FAX: [phone]
http://www.crestaudio.com
Printed in USA
10004 POWER AMPLIFIER
SPECIFICATIONS
AC MAINS-INPUT
CH. C & D AC MAINS-INPUT
CH. A & B
WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT
EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
ATTENTION! POUR ÉVITER LE RISQUE D'INCENDIE OU DE CHOC
ÉLECTRIQUE, NE PLACEZ PAS CETAPPAREIL SOUS LA PLUIE OU Á
L'HUMIDITÉ
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
AVIS : RISQUE DE CHOC ÉLECTRIQUE—NE PAS OUVRIR
Designed & manufactured in the USA by:
Crest Audio Inc.
100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
IN D
IN C
PIN 3+
C
D
STEREO
BRIDGE
PARALLEL
SIGNAL
GROUND
LIFT
IN B
IN A
PIN 3+
A
B
STEREO
BRIDGE
PARALLEL
NEXSYS
OUTPUT
SAMPLE
NEXSYS
OUTPUT
SAMPLE
--
OUT C
+
+
BRIDGE
--
+
OUT D
--
--
OUT A
+
+
BRIDGE
--
+
OUT B
--
PUSH
PUSH
PUSH
PUSH
Rear View
*B5000011*
Architect’s & Engineer’s Specifications
The power amplifier shall consist of four channels and
deliver a minimum of 720 watts at 8 ohms, 1200 watts at 4
ohms and 1400 watts at 2 ohms; per channel, both chan-
nels driven, 20Hz-20kHz, <0.1% THD+N. In bridged mode
(two channels), it shall deliver 2400 watts at 8 ohms and
2800 watts in a 4 ohm load, 20 Hz-20kHz, <0.1% THD+N.
The amplifier shall be rear-to-front tunnel-cooled, with a
two-speed (235 CFM max) DC fan.
The amplifier shall have circuitry to protect itself and the
speaker load from output short circuits, DC voltage on out-
puts, and thermal overload. It shall have RMS clip limiting
and impedance sensing circuitry. Output relays shall pro-
tect the speakers from any type of amplifier failure.
In stereo or parallel operation, the amplifier shall have a
voltage gain of X40 with an input sensitivity of 1.7V for
rated power at 4 ohms. The hum and noise level shall be
greater than 100 dB below rated output, “A” weighted.
The amplifier shall have a class H output stage with a
modulated power supply. The frequency response shall be
greater than 20Hz-20kHz, +0, -.3dB (1W/8Ω).
The amplifier shall operate at either 100, 120, 220, or 240
volts, 50-60 Hz AC, (configured at factory). Maximum cur-
rent draw at 120V shall be no greater than 35.6A per line
cord, both channels driven continuously into a 2 ohm resis-
tance.
The amplifier front panel shall include Active, Temp/DC,
Signal Present and Clip/Limit LED indicators for each
channel, two combination power switch/magnetic circuit
breakers and recessed and detented gain pots.
Rear panel input connectors shall be XLR type, one female
per channel. Output connectors shall be 5-way binding
posts, two pair per channel. A signal/ground lift jumper
shall be provided.
The amplifier shall have two (2) three-conductor AC power
cords.
The packaging of the amplifier shall allow for standard
rack mounting without requiring space between similar
units. Dimensions shall be 19" (483mm) wide, 7" (178mm)
high and 20.5"(521mm) deep. It shall weigh 137 lbs.
(62.20 kg.) net. The amplifier shall be designated the Crest
Audio Model 10004.