've looked around and can't tell if they do on the xD? For my sub, Circuit City says it'll be an extra 80 bucks for the adapter if I need it and I'm like, "Yikes!".

the adapter was only thirty last time i checked at C-city, and no the basic HU does not have pre outs, If you need the whole rca's then they will likely be near 80 withe the adapter. Good luck

Thanks, got it all set now!