Radio Design Labs ST-PA18 18W Mono Audio Amplifier - 8 O

Input:Line level (+4 dBu bal; -10 dBV unbal)Input Impedance:20 k? balanced bridging; 10 k? unbalGain Adjustment:Single turnMinimum Input Levels:-16 dBu* balanced; -18 dBV* unbalancedMaximum Input Levels:+25 dBu balanced; +22 dBV unbalancedFrequency Response:20 Hz to 20 kHz (+/- 2 dB)*THD+N:< 1%**measured at compressor threshold level equaling 12 W RMS output powerNoise:< -75 dB (below 18 W RMS)Compressor:Threshold 3 dB below rated output automatic adjusting attack and releaseCMRR: 45 dB (50 Hz to 120 Hz)Output Power:18 W RMS into 8 ?Output Circuit:Class DAmbient Operating Environment:0?? C to 30?? C Max; 20?? C RecommendedIndicators (2):Red LED:LED indicates compressor activityGreen LED:Power ONPower Requirement:24 Vdc @ 1000 mA Ground referenced