J&M Rokker Series 500 Watt 4-Channel Amplifier Kit Fairing Speaker/Rear Amplifi - One Size Designed specifically for use with Harley-Davidson HK radio Full range class G amplifier 125 watts RMS per channel X4 channels (500 watt total) driven continuous into a 2 ohm load 14.4vdc, 70 watt RMS continuous X4 channels into a 4 ohm load Amplifier mounts to the custom made stainless steel bracket system to provide Solid and secure mounting inside the fairing Custom made plug-n-play wiring harnesses are included with this amplifier kit