Crest audio PRO 10004 SPECIFICATIONS
10004 POWER AMPLIFIER
Product Description
The Crest Audio 10004 is a four-channel, high-power amplifier designed to meet the most demanding needs of the sound professional. By providing 1400 watts at 2 ohms from each of the amplifier’s four channels, this four rack-space unit offers substantial 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 performance. Forced-air is employed to cool channel heat sinks mounted 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 manufacturing facility, with internal components selected for premium quality and proven durability. Each modular subassembly is pretested, and the assembled 10004 receives a rigorous “hot room” burn-in before thorough final checkout on precision test equipment.
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 2Ω imped-
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-AutoRamp gradually increases gain to attenuator setting level when amplifier is turned on.
-Other protection circuitry: comprehensive thermal management, 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).
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Crest Professional Series |
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Amplifiers are fully |
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compatible with the NexSys |
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Computer-Controlled |
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Audio system. |
P o w e r S p e c i f i c a t i o n s |
8 Ω S t e r e o ( x 4 c h . ) |
4 Ω S t e r e o ( x 4 c h . ) |
2 Ω S t e r e o ( x 4 c h . ) |
8 Ω B r i d g e d ( x 2 c h . ) |
4 Ω B r i d g e d ( x 2 c h . ) |
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1kHz, 0.02% THD+N |
7 5 0 W |
1 2 2 5 W |
1 4 0 0 W |
2 4 5 0 W |
2 8 0 0 W |
20Hz-20kHz, 0.1% THD+N |
7 2 0 W |
1 2 0 0 W |
1 4 0 0 W |
2 4 0 0 W |
2 8 0 0 W |
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Figures are Watts per channel, all channels driven.
1 0 0 0 4 P OW E R A M P L I F I E R
S P E C I F I C AT I O N S
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1kHz, <0.02% THD+N |
20Hz-20kHz, <0.1% THD+N |
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8Ω Stereo Power (x4 ch.) |
750W |
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720W |
4Ω Stereo Power (x4 ch.) |
1225W |
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1200W |
8Ω Bridged Mono Power (x2 ch.) |
2450W |
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2400W |
2Ω Stereo Power (x4 ch.) |
1400W |
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1400W |
4Ω Bridged Mono Power (x2 ch.) |
2800W |
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2800W |
Max RMS Output Voltage (each channel) |
91V |
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Peak Output Voltage (each channel) |
137V |
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Frequency Response (+0 / -0.3dB, 1W/8Ω ) |
20 Hz-20 kHz, -3dB @ 53kHz |
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Power Bandwidth (rated power at 4Ω , 1% THD+N) |
20 Hz-20 kHz, +0/-0.2dB |
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Protection Circuitry |
Clip Limit, IGM, AutoRamp, High Temp, short-circuit, |
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DC voltage, turn-on/off transient, sub/ultrasonic input. |
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THD+N (rated power at 4Ω , 1kHz) |
<0.02% |
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SMPTE IMD (rated power at 8Ω , 60Hz & 7kHz) |
0.06% |
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Damping Factor (10-400Hz at 8Ω ) |
600:1 |
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Input CMRR (1kHz) |
>60 dB |
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Input Sensitivity (rated power at 4Ω ) |
1.7V RMS |
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Voltage Gain |
X40 |
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Input Impedance (balanced) |
>20kΩ |
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Hum and Noise (“A” weighted, full power, 4Ω ) |
> -100 dB |
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Crosstalk (“A” weighted, full power, 4Ω ) |
> -60dB |
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Class |
H |
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Input Connectors (per channel) |
Female XLR (pin 3+), Octal Socket |
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Output Connectors (per channel) |
5-way output binding posts |
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Filter Storage |
168,000 µF per channel |
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Power Supply (factory configured) |
100V-240V, 50-60Hz |
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Idle Current Draw (120V) |
1.6A per line cord |
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1/8 Power Curr. Draw (typical music, 120V/4Ω ) |
10.8A |
per line cord |
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1/3 Power Curr. Draw (continuous music, 120V/4Ω ) |
21.8A |
per line cord |
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Max Curr. Draw (circuit breaker rating, 120V/4Ω ) |
35.6A |
per line cord |
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Thermal Emissions (1/8 Power, 4Ω ) |
3380 BTU/hr |
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Thermal Emissions (1/3 Power, 4Ω ) |
6140 BTU/hr |
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Cooling |
Rear to front tunnel, 2 speed DC fan, 235 CFM max |
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Controls |
Front panel: 4 attenuators, 2 circuit breaker /power switches; |
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Rear panel: 2 mode switches, signal ground lift jumper |
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LED Indicators (per channel) |
Clip/Limit, Signal, Temp/DC, Active |
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Construction |
12 ga. steel chassis, .093" (2.5mm) aluminum front panel |
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Dimensions (Height x Width x Depth) |
7" x 19" x 20.5" (19.5" to end of rear ears); |
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178mm x 483mm x 521mm (496mm to back of rear ears) |
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Gross Weight, Net Weight |
145 lbs (65.83 kg.), 137 lbs (62.20 kg.) |
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Warranty |
5 years, parts and labor† |
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† 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 available in downloadable PDF file format; visit our website at http://www.crestaudio.com. ©1997 Crest Audio Inc. 5/21/97
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 channels 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 outputs, and thermal overload. It shall have RMS clip limiting and impedance sensing circuitry. Output relays shall protect 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 current draw at 120V shall be no greater than 35.6A per line cord, both channels driven continuously into a 2 ohm resistance.
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.
Rear View
CAUTION |
IN C |
PUSH |
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RISK OF ELECTRIC SHOCK |
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DO NOT OPEN |
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AVIS : RISQUE DE CHOC ÉLECTRIQUE—NE PAS OUVRIR |
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WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT |
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EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. |
PIN 3+ |
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ATTENTION! POUR ÉVITER LE RISQUE D'INCENDIE OU DE CHOC |
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ÉLECTRIQUE, NE PLACEZ PAS CET APPAREIL SOUS LA PLUIE OU Á |
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L'HUMIDITÉ |
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C |
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A |
-- |
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OUT C |
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BRIDGE |
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D |
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B |
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OUT D |
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PARALLEL |
STEREO |
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BRIDGE |
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NEXSYS |
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PUSH |
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IN D |
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OUTPUT |
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SAMPLE |
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AC MAINS-INPUT |
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CH. C & D |
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PUSH |
IN A |
Designed & manufactured in the USA by: |
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Crest Audio Inc. |
PIN 3+ |
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100 Eisenhower Dr. |
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Paramus, New Jersey 07652 USA |
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OUT A |
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BRIDGE |
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SIGNAL |
OUT B |
GROUND |
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LIFT |
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PARALLEL STEREO
BRIDGE
PUSH |
IN B |
NEXSYS |
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OUTPUT |
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SAMPLE |
AC MAINS-INPUT
CH. A & B
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Crest Audio Inc. |
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100 Eisenhower Dr., Paramus NJ 07652 USA |
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TEL: 201.909.8700 FAX: 201.909.8744 |
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http://www.crestaudio.com |
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*B5000011* |
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Printed in USA |
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v. 2.5 10/15/97 B5000011 |
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