Bass / Treble control   Variable bass boost at 45Hz (0-12dB )   High pass variable crossover ( 40Hz-400Hz at 12dB Oct )   Line out ( low pass )   Audio Mute circuit   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 90W x 2CH RMS power at 4 OHM Mono 250W x 1CH RMS power at 2 OHM Stereo 130W x 2CH Max Power 500W T.H.D 0.05% Input Sensitivity 200mV~4V Input Impedance 10K ohms Damping Factor >150 S/N Ratio 100dB Channel Separation 60dB