anyonw know the mounting depth for rear speakers on a C5? i was planning on using a set of Alpine SPX 177r comps back there and they're a little large.
If its a coupe I dont think they'll fit with out a spacer. I just put a set of pioneer TS-C720PRS in mine and they look to be the same size. On the drivers side I had to dent the metal behind the speaker and still put a 1/2"-3/4" wedge ring in. Now I have to do something with the grills because of the heigth. It just depends how much you want to do to get the sound you're looking for.