iDatalink aHD2 Wiring Harness Add a Rockford Fosgate DSR1 digital signal processor to select 2014-20 Harley-Davidson motorcycles without GTS sound systemAbout the iDatalink aHD2 Wiring Harness All the room in the world This aHD2 wiring harness allows you to add a Rockford Fosgate DSR1 digital signal processor (sold separately) to your Harley Davidson's audio system, allowing you to add and control aftermarket amplifiers. The interface allows you to keep your handlebar audio controls and other safety and convenience features, and reprograms the factory radio to Amplified mode. This T harness ties right