if i want to amp my components, and have a different amp for my subs do they need to be the same brand amps, how would i hook up two amps, i know how to hook up one amp, i just put the rcas in the pre out behind the deck to the amp, and remote wire to where it goes, and then run power from batt to amp , then have ground wire go from amp to metal. but how do i hook up another amp for my mids and highs? any help would be graetly appreciated