OSD Audio SMP60 Compact 75W Class A/B Mono Subwoofer Amplifier w/ Variable High Cut Filter and Volume Control 75 Watt Peak Power / 40-watts Continuous RMS Power Impedance: Single 8 Ohm Impedance Driver Front Controls: variable High Cut Filter and Volume Control Knob Choice of Inputs: Signal (low Level) RCA L+R or 3.5mm Stereo Input Shipping: This item does not ship outside the US