Kit includes a full range class D audio amplifier, spec'd at 200 watts RMS per channel X4, (800w total) into 2-ohm load @ 14.4vdc, with dimensions of 8 1/4ö Long X 5 1/8ö Wide X 1 5/8ö Tall Amplifier mounts to the custom made stainless steel 2-piece bracket system, to provide solid and secure mounting inside the fairing The 800w ROKKER XXR amplifier has been dialed in for this specific 4-speaker configuration, to provide maximum highway performance. (Updated amplifier gain/frequency settings as of 12-01/2019) Custom made plug-n-play green-band wiring harnesses are included, along with heavy gauge power/ground wires for the fused battery connection and all necessary mounting hardware J&M's ROKKER XXR series 6.71" speakers have been designed as exact size component/replacements for the stock 6.5" Harley fairing and rear-pod speakers as installed on the 2014-2019 Harley Ultras Spec'd at 2 ohms impedance and 300 watts maximum input (200w RMS - 91db sensitivity), speakers provide the ultimate in raw audio power and include the new custom grills with built-in high-output tweeters They feature a lightweight waterproof one-piece woven-fiber driver cone with super-rigid metal basket design High-density lite-weight Neodymium magnet structure, specially coated to maintain flux-strength integrity even at extreme operating temperatures High efficiency vented voice-coil for improved cooling when operating at high volume levels for extended periods This ROKKER XXR EXTREME custom installation KIT has been engineered to be 100% plug-and-play to maintain the integrity of your Harley's internal wiring harness, it is tuned for the Stock-Harley-Radio-Flash and includes a complete installation/operation instruction manuals Special flash needed. AMP ROK800W4CH 14-20 FLHX