Originally Posted by 2fast4thelaw

I agree with you, Rear fill really does add alot of ambiance that would otherwise be missing.

I will tell you, you are not going to be able to fit 4" without alot of modification. Find a good set of 3-1/2" speakers and cross them as high as you can. At least 150 to 200Hz and 300Hz or 400Hz would be even better as you can apply more power to them.

I used a set of JL Audio CS series and they fit perfectly. I wanted to put a set of 4" focal polykevlar midrange speakers in there but they wouldnt fit. Depth does not seem to be an issue with speakers this size.

I wouldn't bother with a comp set. A good coaxial or just a midrange speaker will suffice for the proper effect. You are not going to hear bass or highs from them anyway.