power amplifier 1. Have class 3 and class 4H diagram design. 2. Low consumption,less heat. Professional amplifierC-series big power amplifier cover from 400WX2-1200WX2/8ohm ... ratio>95dBInput impedance20KΩ/bal,10KΩ/unbal.Input sensitivity0.775V,1V,1.4VSegregation>70dBPower supplyAC220-240V,50/60HzDimensions580X580X160mmTotal21kg C-18 2-channel power amplifier