4Ch Amplifier With MOSFET Power Supply Thermal,Overload,Short Protection 4Ch Amplifier With MOSFET Power Supply Power Output RMS power ohm RMS bridged power ohmTHD<0.1% S/N RATIO>85dB efficiency>65%low pass frequency:50Hz--250Hzhigh pass frequency:50Hz--250HzThermal,Overload,Short Protection Nickle Plated RCA &Speaker Terminals Dimensions[LxWxH]:328x167x55mm Boss Electronics 4Ch MOSFET Amplifier