When you wire a set of componant seperates, how do you decide what resistance is there? If the set says 4ohms, is that 4ohms per side or 4ohms per speaker on the side? I basically have a set of CDT 642 that says 4ohm speakers and I'm trying to decide how to wire them to get the most out of my 425HCCA amp. The first two channels of the amp will power the CDT trio as well as a CDT imaging set of tweeters. The second two channels are going to power a set of 2ohm 6.5XXX. I'll probably add somthing later to the second channels to drop the amp down to 1ohm for more power. How should I set this up?