If I were to ditch the spare,

No, no -- keep the spare, the speaker fits inside the dish of the spare wheel. I have 14" wheels, and a 10" speaker fits in there with about 1/4" of clearance all around the magnet assembly.

This also has the advantage of eventually magnetizing the spare wheel, so if you do get a flat tire and use the spare, it will pick up things like tools, coins, etc. off the ground as you drive along. :-)

tanstaafl.

"There Ain't No Such Thing As A Free Lunch"