RFRB Refurbished Pioneer GM-DX871 Limited Edition Mono Subwoofer Amplifier — 800 watts RMS x 1 at 1 ohm The Pioneer GM-DX871 mono subwoofer amplifier delivers up to 800 watts RMS to your subwoofer with highly efficient Class D technology that keeps this powerful amp running at cool temps. This amplifier can handle a 1-ohm load, so no need to worry about impedance if you plan to add another sub to your car's system in the future. The amp also offers a low-pass filter that lets you quickly sharpen and focus the bass to suit your vehicle and preference, and a wired remote boost that lets you control the amount of bass boost from the front seat. This limited-edition amp uses high-grade electronic parts and gold-plated RCA connections to ensure maximum performance. Product highlights: mono subwoofer amplifier 300 watts RMS x 1 at 4 ohms (500 watts RMS x 1 at 2 ohms) 800 watts RMS x 1 at 1 ohm CTA-2006 compliant Class D amp technology frequency response: 10-240 Hz variable low-pass filter (40-240 Hz, 12 dB per octave) wired remote variable bass boost (0-18 dB at 50 Hz) More Features: preamp inputs and outputs gold-plated RCA connections speaker-level inputs via supplied RCA-type adapters signal-sensing turn-on with speaker-level inputs wiring and hardware not included with amplifier 4-gauge power and ground leads recommended fuse rating: 40A x 2 dimensions: 10-3/8"W x 2-3/8"H x 7-7/8"D warranty: 1 year