Detailed Product Description features:max RMS Output Voltage(each channel) 90VMax peak Output Volage 140VFrequency Response(+ ... -20KHz,-.2dB/+.2dBTourClass protectionACL,IGM,AutoRamp,short circult,DC voltage,turn-on/off transient,current inrush,sub/ultrasonic inputTHD ... ground lift&mode switchs; cal8:XLR polarity&input sens/voltage gain switchsLED indicators(per channel)Clip/limit,singal,temp/DC, ...