if your deck has dual outputs, then you run RCA cables to each amp, if not then an RCA splitter should work fine to get the signal to both amps. as for speaker output, your speakers will need to get signal from the 4ch amp and not the deck, otherwise the amp is useless. get yourself a set of distribution blocks for the power and ground connections as well.
alright thanks a lot i have trying to do this but u know couldn't find ppl that knows how to... but hey thanks again
Honestly this is very easy and logical. You just need to think about it. Searching is your friend. Most companies that sell amps have wiring diagrams. Not to mention the vast amount of knowledge google can share.
Whats up people?