I recently heard a lot of systems in cars or trucks. My friend just bought a truck with 2 12" subs. I know someone else who also has 2 12"s in his car and it just doesn't sound good at all. I'm used to hearing my Shiva 12" in my room, and mine would be the hell of out those any day. So my question would this work putting one, or if possible two, in a car? And how big would the box have to be? If it would work it would sound much much better than any of those Best Buy subs!