RDL FP-PA20A 20W Mono Audio Amplifier - 70V or 100V

Input:Line level (+4 dBu bal; -10 dBV unbal)Input Impedance:20 k? balanced bridging; 10 k? unbalInput / Output Connector:Detachable terminal blockGain Adjustment:Single turn audio taperMinimum Input Levels:Balanced:-26 dBu (to cross compressor threshold)Unbalanced:-28 dBV (to cross compressor threshold)Maximum Input Levels:Balanced:+23 dBuUnbalanced:+15 dBVFrequency Response:50 Hz to 20 kHz (+/- 3 dB)*THD+N:< 0.1% (@ 1 kHz)* < 0.5% (50 Hz to 20 kHz)**measured at compressor threshold level equaling 4 W RMS output powerNoise:< -80 dB (below 20 W RMS)Compressor:Threshold 6 dB below rated output automatic adjusting attack and releaseCMRR: 55 dB (50 Hz to 120 Hz)Output Power:20 W RMS @ 70 V or 100 VAmbient Operating Environment:0?? C to 30?? C Max; 20?? C RecommendedIndicators (2):Red LED:PEAK LED indicates compressor activityGreen LED:Power ONPower Requirement:24 Vdc @ 2000 mA Ground referenced (for continuous RMS power output) 24 to 33 Vdc @ 1000 mA Ground referenced (for normal uncompressed audio)