High pass variable crossover ( 40Hz-400Hz at 12dB Oct ) - Front CH   Low pass variable crossover ( 40Hz-240Hz at 12dB Oct ) - Rear CH   Trimode switch   Audio Mute circuit·   Three step bass boost switch ( 0dB, 6dB, 12dB ) at 45Hz - Rear CH   Power band width 20Hz~20KHz at 0.05%   PWM mosfet power supply   Protection circuit for thermal, overload, DC reverse, DC offset       Frequency Response 10Hz~40KHz RMS power at 4 OHM Stereo 40W x 4CH RMS power at 4 OHM Mono 110W x 2CH RMS power at 2 OHM Stereo 60W x 4CH Max Power 280W T.H.D 0.05% Input Sensitivity 200mV~4V Input Impedance 10K ohms Damping Factor >200 S/N Ratio 100dB Channel Separation 60dB