Quote Originally Posted by crager34
Circuit City just told me a couple days ago all 4 speakers are 5 1/4".

The individual was either lying, or seriously mistaken. The difference is a full inch and a quarter, by no means the same.

I can tell you, that with modification you can fit 5 1/4 speakers in the rear. I have a picture in my galerry of the modified bracke with a 5 1/4 installed. You really only need to remove the panels in front of the jack to access the mid panel speaker mounts.