You probably don't want to do this. I tried this on a whim in my car, and the results were miserable. It vibrated EVERYTHING in the car. It sounded awful. If you want to go this route, you will need to make a fiberglass tub in the spare-tire well, and heavily sound-deaden the well. My roommate and I took the tire bracket out of his tire well and are currently constructing a fiberglass enclosure for 2 15's. It's not hard at all, just a little time-consuming. It takes quite a few layers of fiberglass to make it rigid enough, and a lot of bracing. It's possible to do a fiberglass enclosure in the well without removing the bracket, but you might have to bring your baffle up a big so the magnet(s) clear that bracket. Let me know if you want to go this route and don't know how to work with fiberglass.

Clint

>i got a board i'm cutting
>and gonna cover with vinyl
>for use as a floor
>board for my trunk. the
>question is does anyone know
>of a good 15" woofer
>that is possibley "freeair" or
>what if i installed a
>gasket on the back of
>the wood and bolted it
>down to the chassis and
>use the spare tirewell as
>a box? or should i
>just get a 12" woofer
>and buy a small box
>to mount to the underside
>of the board?