My buddy wants to put in 2 12' subs in the back of his mustang, but he doesnt have an after market cd player. We've got the amp and 8 gauge wiring kit needed to do the task, but his cd player doesnt have RCA connectors. Does anyone know anything about how to bypass getting an after market cd player? Oh, and his car comes stock w/ the Mach 460 factory sound system installed, if that helps. Thanks guys.