Amplify your car audio experience with the Pioneer GM-DX871 Class D Mono Amplifier. This powerful amplifier boasts a maximum output of 1600 watts, making it the perfect addition to any car audio system. Designed by Pioneer, a trusted brand in the industry, this amplifier ensures crisp and clear sound quality. With its compact design, this amplifier is easy to install and fits seamlessly into any car audio setup. Its mono channel configuration provides a strong and consistent output, while the absence of a bass knob allows for a more streamlined appearance. This amplifier is compatible with various car audio systems and is manufactured in Vietnam. Please allow professional installation if you are unaware of how to install a aftermarket car audio amplifier. MFD November 2019 Tested and is in perfect working condition. No bass booster knob. A few small imperfections as seen in photos. Please review all photos to ensure you have a good understanding of the minor scuffs. Scuffs have not affected the overall working condition of the amplifier. Cool bass Pioneer's handsome GM-DX871 mono subwoofer amplifier can deliver up to 800 watts RMS to your subwoofer, for powerful bass that'll give every song a strong and heavy beat. Highly efficient Class D technology keeps this powerful amp running as cool as it looks, and allows for a small chassis that fits in a lot of out-of-the-way spaces. And this little workhorse can handle a 1-ohm load, so you won't have to worry too much about impedance matching when you add another sub to your system down the road. Connections and tuning for all occasions Speaker-level inputs allow you to install this amp in a factory system with no RCA connections — the amplifier switches its input mode automatically when it detects the high-level signal, eliminating the need to run a turn-on lead to your receiver or fuse box. The amp's got a low-pass filter that lets you quickly sharpen and focus the bass to suit your vehicle's interior, 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: 10-3/8W x 2-3/8H x 7-7/8D Please feel free to contact us with any questions or concerns you may have about this Pioneer amplifier.