I have a Kenwood Deck forgot the model # ne ways it has one preout REAR(SUB)i have a sub amp hooked to it. and another one that says front im not usin the amp on the deck im amping my speakers.and when i connect the rcas to the front it is not as loud as when i put it on rear and it's all staticy whats the problem? did the RCAs go bad?? and is there anything i can buy?! or do i need a deck? i was also looking at the Pioneer DEH-P7800MP cause it has 3 Sets of preouts.is this a good headunit?? THANKS IN ADVANCE!!!