yes that looks correct! but i thought that the 4 channel amp would also have to be connected to a set of RCA's coming from your head unit, just like the amp running the sub. but i could be wrong. come to think about it i want to know the answer to that question for sure! lol sorry i'm not trying to confuse you, i just thought that each amp HAS to have a set of RCA's
no you are not required to run RCAs.
