I am building up my system. I'd going to have one 12 with a "d" class amp. I am wondering how many amp(s) I need to run my 2 6.5" in the doors, 2 1" tweeters, and 2 6X9's in the rear deck? Will another "d" class amp work? Or will I need a channel for each set of 2 speakers(so a 3 channel)?

I'd like to only have 2 amps mounted in the trunk. How many will I need?

Thanks!
Spike