2-ch 400w fairing speaker amplifier kit for 2015-2021 Harley RoadGlide or Ultra with stock Harley 4.3 Std, 6.5GT or new GTS touch-screen radio, NO SPECIAL FLASH needed. Full range class D audio amplifier, specd at 200watts RMS per channel X2, (400w total) into 2-ohm load @ 14.4vdc. Amplifier mounts to custom made stainless steel 2-piece bracket system, to provide solid and secure mounting inside the RoadGlide fairing.