MODEL:BSD2100 2 CH Mosfet Amplifier Thermal, Overload, Short Protection Nickel Plated RCA&Speaker Terminals Power Output: RMS Power Per Channel @ 4 Ohms 50W x 2 CH Power Output: RMS Power Per Bridged @ 4 Ohms 150W x 1 CH 1 Ohm; 2 Ohms Stable Variable Bass Boost: 0-18dB Crossover Frequency: LPF-50Hz~250Hz, HPF-50Hz~250Hz Subsonic: 15~20Hz/ Phase Shift: 0皛180? THD:≤0.1%, S/N:>90dB, Channel Separation:>60dB Frequency Response: 20Hz-40KHz, Bridgeable Input Voltage Range: 200mV-8V 4 CH, MONO available with same style OEM is available