Bass / Treble Control   Low pass variable crossover ( 40~400Hz )   Q bass frequency switch (30Hz/35Hz/45Hz/60Hz)   Q bass control up to 18dB. Q Select 4/2   Q bass remote control (option)   Protection circuit for thermal, overload, DC reverse, DC offset   Bridgeable   Trimode capability   Audio Mute circuit   PWM mosfet power supply   2ohm mono / 1ohm stereo       Frequency Response 10Hz~40KHz RMS power at 4 OHM Stereo 80W x 2CH RMS power at 4 OHM Mono 300W x 1CH RMS power at 2 OHM Stereo 150W x 2CH RMS power at 2 OHM Mono 400W x 1CH RMS power at 1 OHM Stereo 200W x 2CH Max Power 550W T.H.D 0.05% Input Sensitivity 200mV~7V Input Impedance 10K ohms Damping Factor >200 S/N Ratio 100dB Channel Separation 60dB