J&M Rokker Series 250 Watt 2-Channel Amplifier Kit for 2006-2013 Ultra, Street - One Size Designed specifically for use with Harley-Davidson HK radio Full range class G amplifier 125 watts RMS per channel X2 channels (250 watt total) driven continuous into a 2 ohm load 14.4vdc, 70 watt RMS continuous X2 channels into a 4 ohm load Amplifier mounts to the top of the custom made stainless steel bracket system, which has the slots in the bottom section to properly relocate 2 of the Harley CB, MP3 or XM sat radio modules, if installed. Custom made plug-n-play wiring harnesses are included with this amplifier kit