Crest Audio 7001

The Crest Audio 7001 power amplifier is a compact, high-power amplifier designed to meet the stringent needs of professional use in concert touring, high quality sound reinforcement, professional fixed installations, and studio monitoring. A two rack-space amplifier, the 7001 uses forced-air to cool channel heat sinks mounted in a back-to-back tunnel configuration. Stereo, parallel, and bridged mono operating modes can be chosen with a rear-panel Mode Select switch. An actively balanced female XLR input connection and 5-way output binding posts are provided for each channel. The 7001 is fully compatible with the other Crest Audio Professional Series amplifiers, Octal Socket Accessories and the NexSys® computer-controlled audio system.
Features:
NexSys-ready
Toroidal power transformer
Tunnel cooling
Dual, variable speed DC fans
High thermal mass heat sinks
Balanced XLR inputs
5-way output binding post connectors
Stereo/Parallel/Bridged Mono mode selector switch
Rear panel ground lift jumper
Extensive 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 impedances.
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.
Ultra-strong, single piece steel chassis
Octal Accessory sockets
Recessed, stepped attenuators
Front panel circuit breaker/power switch
Modular construction
Specifications:
1kHz, ɘ.025% THD+N & 20Hz-20kHz, ɘ.05% THD+N
8Ω Stereo Power: 5600W, 550W
4ΩStereo Power: 810W, 715W
8Ω Bridged Mono Power: 1650W, 1510W
2Ω Stereo Power: 850W, 850W
4Ω Bridged Mono Power: 1700W, 1600W
Max RMS Output Voltage (each channel): 83V
Peak Output Voltage (each channel): 117V
Frequency Response (+0 / -0.3dB, 1W/8Ω): 20 Hz-20 kHz, -3dB @ 53kHz
Power Bandwidth (rated power at 4Ω, 1% THD+N): 20 Hz-20 kHz, +0/-0.2dB
Protection Circuitry: Clip Limit, IGM, AutoRamp, High Temp, short-circuit, DC voltage, turn-on/off transient, sub/ultrasonic input.
THD+N (rated power at 4Ω, 1kHz): <0.02%
SMPTE IMD (rated power at 8Ω, 60Hz & 7kHz): <0.1%
Damping Factor (10-400Hz at 8Ω): 400:1
Input CMRR (1kHz): >60 dB
Input Sensitivity (rated power at 4Ω): 1.4V RMS
Voltage Gain: X40
Input Impedance (balanced/unbalanced): >20kΩ/10kΩ
Hum and Noise (“A” weighted, full power, 4Ω): > -100 dB
Crosstalk (“A” weighted, full power, 4Ω): > -60dB
Class: H
Input Connectors (per channel): Female XLR (pin 3+), Octal Socket
Output Connectors (per channel): 5-way output binding posts
Filter Storage: 80,000 μF
Power Supply (factory configured): 100V-240V, 50-60Hz
Idle Current Draw (120V): 1.4A
1/8 Power Current Draw (typical music, 120V/4Ω): 7.8A
1/3 Power Current Draw (continuous music, 120V/4Ω): 15.5
Max Current Draw (circuit breaker rating, 120V/4Ω): 21.0A
Thermal Emissions (1/8 Power, 4Ω): 2503 BTU/hr
Thermal Emissions (1/3 Power, 4Ω): 4505 BTU/hr
Cooling: Rear to front tunnel heatsink, 2 variable speed DC fan
Controls: Front panel: 2 attenuators, circuit breaker/power switch; Rear panel: mode switch, signal ground lift jumper.
LED Indicators (per channel): Clip/Limit, Signal, Temp/DC, Active
Construction: 16 ga. single piece steel chassis, .187" (5mm) alum. front panel
Dimensions (Height x Width x Depth): 3.5"x19"x15" (16" to rear ears) 89mm x 483mm x 381mm (406mm to rear ears)
Gross Weight, Net Weight: 57 lbs. (25.88 kg.), 52 lbs. (23.60 kg.)
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