SE, as long as I had the camera out, I snapped a pic of my almost finished subwoofer (need to dress/finish the cabling). This is fit in the sport wagon version, but you could do the same in the sedan. It's a home-made cabinet made of MDF and polyester resin containing a Kicker Solobaric 8". One reason I did it this way was to find a place to mount the amp that is out of the way -- leave the storage space in back of the wagon as clear as possible. This is more of an issue for wagonistas I suppose and you have more spots to hang amps in the sedan.

Jim