Check the listing for details. QSC 1400 2 Channel Power Amplifier. Condition: Used. Listed at 85.00 USD. Model: 1400. Power Output (Stereo): 200W (both channels driven, 0.1% THD). Total Harmonic Distortion (THD): < 0.1% at rated power (0.01% typical). Input Sensitivity: 1.0 V RMS for rated power (8 ohms).