yes you can do that if you have two sets of RCA connections on your deck
You just confused me. I thought I could take the 4 sets of speaker wires off of my deck and run them to the HI INPUT on an amp and have that run the 4 speakers. Then run RCA from the back of my head unit to a different amp to power a sub. But you say I must have two sets of RCA to do that... which I do not have, I only have one set. I am lost again.
