I dont need an interface. It would be nice, but all I really need is an auxiliary adapter for a 2000 mach 460 sound system. I have been looking around, and I am having trouble finding an adapter for my year and without an interface. I have read that there is a CD changer input on the back of the head unit and all I need is an adapter that will have a plug for the factory CD changer on one end and a RCA input on the other. If they dont make a simple adapter, I will probably end up getting an interface, but I'd rather get just the adapter, as I am trying to keep the cost minimal. Anyone know of anything that will work for me?