2ChAmplifier With MOSFET Power Supply Power Output RMS power 75Wx2@4 ohmmax power:200Wx2@4 ohmRMS bridged power 220Wx1 @4 ohmTHD<0.1% S/N RATIO>85dB efficiency>65%low pass frequency:50Hz--250Hzhigh pass frequency:50Hz--250HzThermal,Overload,Short Protection NicklePlated RCA &Speaker Terminals Dimensions[LxWxH]:278x167x55mm