Product Features: Isolated P.W.M Power Supply Maximum Output Voltage 8 Volts Rotary Input/Output Control Subwoofer Crossover Variable From 30-250Hz. Subwoofer Volume Control Master Volume Control/Fader Control Four Band Parametric EQ With Separate A18 dB Boost Controls Night Illumination CD Input S/N Ratio: 11odB T.H.D: 0.4%