I have a large sub box with 2 12-inch Diamond subs that came out of my Excursion and I would like to use it in my 07 EXT. If I put it in the bed with the midgate up, how will the sound from it be? Has anyone done this? What other ways can subs be mounted in an EXT? I don't want to drive around with the midgate down or cut holes in it. Also, where can you mount an amp in an EXT? Under the front passenger seat? It looks like putting one under the back seat might interfere with folding the seat forward when you drop the midgate. Thanks.