I think we might have a bit of miscommunication. The Rockford Fosgate Heady Unit that I have has a built in 6 disc changer. There is no plug in on the back of it for any external plugs. I remember this because the Alpine I had in my old Pathfinder did have the round plug in. I'm starting to think this isn't going to work. Ironic how burning music on CD's is now considered old school. Thanks for the help though. This site is pretty great.