Crest 7001 Power Amplifier
Crest 7001 Power Amplifier
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.)
