Price Match Guarantee Kicker 51KPX5001 KPX500.1 500-Watt Powersports & Motorcycle Subwoofer Amplifier KPX Compact Amplifiers are specially designed to deliver tremendous power in a true, tiny, weather-resistant footprint - for big sound without over-taxing your charging system. Purpose-built to perform on your motorcycle or anywhere space is compromised, these weather-resistant amps deliver the stunning realism you've come to expect from KICKER. Flexible, built-in crossovers allow you to craft the sound with precision while ensuring long speaker life. Motorcycle amps belong in one place: over your radio, and out of your way. KPX Amplifiers are engineered with that perfect fit in mind. To ensure our amps work with most any radio, these amplifiers can accept signals as low as 125 millivolts and as high as 40 volts. Product Highlights: Compact all-weather mono subwoofer amplifier 150 watts RMS x 1 at 4 ohms 300 watts RMS x 1 at 2 ohms 500 watts RMS x 1 at 1 ohm Variable low-pass filter (4