Crest Audio CPX900 Stereo Power Amplifier (300 Watts)
Affordable CPX amplifiers bring with them Crest's tradition of great sound quality, flexibility and reliability. Industry standard connectors and features make the CPX a great back bone for mobile sound systems, project studios, and many other applications. DJs and musicians will also find CPX as the power amp of choice. Features include a high-quality built-in 150Hz subwoofer crossover, a 2-speed fan, and Crest's GCL Gain Comparator Limiting system. Inputs: barrier strip, XLR & 1/4 in. TRS. Outputs: binding posts (bridge mode only) and Speakons.
Features
GCL Gain Comparator Limiting system
Rear panel defeat switch
Built-in Crossover
150 Hz 24 dB per octave Linkwitz-Riley filter, tuned for subs
Individual in/out switches for Channels A and B
1/4 in. daisy chain outputs
Input connectors--Barrier strip, Female XLR 1/4 in. TRS
Rear panel polarity switches for XLRs
Pin 2 hot
Outputs connectors
Speakons for Ch A and B and Bridged mono
Binding posts for Bridge mode
Mode selector switch for stereo and bridged-mono operation
Two-speed DC Fan
Technical Info
Specifications
Stereo power 8 ohms: 1kHz, 0.1% THD+N: 180W
Stereo power 4 ohms: 1kHz, 0.1% THD+N: 300W
Stereo power 2 ohms: 1kHz, 1% THD+N: 450W
Bridged mono power 8 ohms: 1kHz, 0.1% THD+N: 600W
Bridged mono power 4 ohms: 1kHz, 1% THD+N: 900W
Hum & Noise: Stereo mode, Below rated output power, 4 ohms: 100 dB
Input sensitivity & Impedance:
At rated output power, 4 ohms: 0.87V RMS (-1.2 dBv)
Unbalanced, 1/4 in. phone jack: 20K Ohms
Balanced, XLR: 10K Ohms
Overall system gain per channel: 40X (+32dB)
Distortion:
SMPTE-IM: less than 0.01%
Stereo mode, both channels driven, 4 ohms 20 Hz to 20 KHz, 10dB below rated power: Less than 0.03%
20Hz to 2 KHz, at full rated power: Less than 0.03%
Frequency response:
Stereo mode, both channels driven +0, -1dB @ 1W RMS, 4 ohms: 20Hz to 20kHz
+0,-3dB @ rated output, 4 ohms: 5Hz to 50kHz
Damping factor (typical value): Stereo mode, both channels driven 8 ohms, 1 kHz: >300
Power consumption: Stereo mode, both channels driven @ 1/3 output power, 4 ohms 120 VAC: 5.0A
Topology: Class AB
Weight: 40 lbs. (18.2 kg)
Dimensions: 3.5 in. H x 19 in. W x 14 in. D 8.9 cm H x 48.3 cm W x 35.6 cm D 
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