pioneer used to make one that was round and meant to fit inside of a spare tire. I remember talking to someone about putting one in a VX, but don't think it ever happened. That would be nice and out of the way, and then the dogs couldnt even get to it. Only down side to that is you have to run wires through the loom in the door, but it is possible. Right now I have 2 pairs of 12ga speaker wire, a set of RCA cables and 2 16ga wires run through mine