Crest Audio CA18

Absolute sonic accuracy is the hallmark of every rack mount Crest amplifier. Bass is solid and defined to the limits of audibility, with ample current reserves delivered by an “over-engineered” power supply and advanced Class H circuitry. Wide-bandwidth output devices assure detailed, transparent high frequency response. And, thanks to Crest’s exclusive IGM (Instantaneous Gain Modulation) circuit, the CA 18 will drive 2-ohm loads safely without compromise in performance.
 
The CA series by Crest Audio provides tremendous value in proven amplifier technology. CAs form the backbone of discriminating rental systems and high-power club installations worldwide. Auditoriums, churches, regional tour sound companies and mobile DJs are all ideal candidates for the CA Series’ combination of value and sonic quality.
Features
8 Ohm Stereo – 1000 W
4 Ohm Stereo – 1800 W
2 Ohm Stereo – 2500 W
8 Ohm Bridged – 3600 W
4 Ohm Bridged – 5000 W
Legendary over-built power supply
Toroidal power transformer
Latest generation of high-speed, wide-bandwidth output devices
Twin-tunnel cooling with back-to-front air flow
Dual, rear-mounted, continuously variable-speed fans
Balanced male and female XLR inputs with switch-configurable XLR polarity and sensitivity selection
Speakon or five-way binding post output connectors (market dependent)
Stereo, parallel, bridged-mono mode selector switch
Ground-lift switch
Front panel circuit-breaker switch
Recessed, stepped attenuators
SIGNAL present/active, PROTECT, and ACL LED’s
Modular construction
Powder-coated steel chassis
Five-year warranty (3-Year Warranty with 2 additional years if Registration Card is sent to Crest Audio)
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Specs
 
CA 18 5000W Power Amplifier Specifications:
Model: CA 18
8 Ohms Stereo Power: 1000W 1kHz, 0.03% THD+N; 950W 20Hz-20kHz, 0.1% THD+N
4 Ohms Stereo Power: 1800W 1kHz, 0.03% THD+N; 1700W 20Hz-20kHz, 0.1% THD+N
2 Ohms Stereo Power: 2500W 1kHz, 0.03% THD+N; 2400W 20Hz-20kHz, 0.1% THD+N
8 Ohms Bridged Mono Power: 3600W 1kHz, 0.03% THD+N; 3400 W 20Hz-20kHz, 0.1% THD+N
84Ohms Bridged Mono Power: 5000W 1kHz, 0.03% THD+N; 4800W W 20Hz-20kHz, 0.1% THD+N
Max RMS Output Voltage (each channel): 99V
Peak Output Voltage (each channel): 140V
Frequency Response (+0 / -0.3dB, 1W/8 Ohms): 20Hz-20kHz, -3dB@150kHz
Power Bandwidth (rated power at 4 Ohms, 1% THD+N): 20Hz-20kHz, -.2dB/+.2dB
TourClass Protection: ACL, IGM, AutoRamp, short circuit, DC voltage, turn-on/off transient, current inrush, sub/ultrasonic input.
THD+N (rated power at 4 Ohms, 1kHz): <0.03%
SMPTE IMD (rated power at 8 Ohms, 60Hz & 7kHz): <0.01%
Damping Factor (10-400Hz at 8 Ohms): 800:1
Input CMRR (1kHz): > – 70dB
Input Sensitivity (rated power at 8 Ohms ): .775V standard (switchable)
Voltage Gain: X115 standard (switchable)
Input Impedance (balanced/unbalanced): >20kohms/>10kohms
Hum and Noise (“A” weighted, full power, 4 Ohms): -115dB
Crosstalk (“A” weighted, full power, 4 Ohms)”: > – 80dB
Class: H
Input Connectors (per Channel): Female XLR (pin 2+, switchable for pin 3+), TRS (tip+)
Input Connectors (per Channel): Speakon connectors or 2 pair of 5-way output binding posts
Filter Storage: 144,000 mF
Power Supply (factory configured): 100V-240V, 50-60Hz
Idle Current Draw 120V: 3.0A
1/8 Power Current Draw (typical music, 120V/4 Ohms)12.0A
1/3 Power Current Draw (continuous music, 120V/4 Ohms): 25.0A
Max Current Draw (circuit breaker rating, 120V/4 Ohms): 36.0A
Thermal Emissions (1/8 Power, 4 Ohms): 7125 BTU/hr
Thermal Emissions (1/3 Power, 4 Ohms): 9450 BTU/hr
Cooling: Back-to-front via 2 rear panel mounted variable-speed DC fans
(filters removable without tools)
Controls: Front Panel: 2 attenuators; Rear Panel Switches: signal ground lift,
mode select, gain select, XLR input pin 2/3 hot (+) Clip/Limit, Signal, Temp/DC, Active
Construction: Steel chassis, 16 gauge. Double thickness in rack ear areas.
Dimensions (W x H x D): 19″ x 5.25″ x 15″ (483 x 134 x 381 mm)
Weight: 77 lbs. (35 kg)