Ok I know this says car audio but I am putting a nice sound system in my boat. I have 4 speakers and 1 sub. I have two JBL GTO1004 4 Channel 1200w max Amps. What I want to do is have 1 of these run the 4 speakers in the boat and the other run my 4 tower speakers on my wakeboard rack. So my question is if I run an RCA cable from the head unit using the front output going to the input for front on the AMP will it run all 4 speakers or do I need to by a Y cable and plug it into the R and L + and one to the R and L - and then plug in the wires. If I do that will I lose any performance? Would you suggest something else?