Correct me if I'm wrong but I can use one set of rca's from the headunit to connect to the two amps with Y Cables right? One Y Cable coming from the left to ine amp and one from the right to the other amp?
sub amps? most sub amps have a pass-through set of RCA connections to daisy-chain the amp signal to another amp. if not, use Y splitters on L and R RCA lines, and send both L and R signals to both amps.
that is, unless one amp is a left speaker, and one is right.. then sure split it L and R