The front speakers are where you really want the quality sound coming from, as they are where the soundstage/imaging come from. The rears are just for fill. This being said, you could run an amp for the fronts, and run the rears on the head unit. I have done this in several cars with great results. If you are thinking about a sub, you can use a four channel amp and run the sub on the amp's rear speaker outputs. These are just a few of many configuration choices that work. No matter what you do, at least run the fronts on a separate amp.
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Brian T.
2011 Chevrolet Camaro Convertible
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