.....Mac, I'm thinking 14X14 faceplate and rearplate, with 13x13 internal volume and 13X13 internally-encased rearplate, capped with the 14X14 rearplate, and lotsa' silicone and Elmer's wood glue....not sure about the internal depth yet....I called the car shop yesterday/Saturday about noon, and the guy who owns the place, Matt, said his main installer didn't show, and it would be better to come Monday, tomorrow....I just need to hear 10 and 12 inch elements being fired from 10-12 feet away via sealed boxes, and I will know....the quickness will be there, not sure of anything past that....
.....guys, I've done figured this thing out to where you can try it with nothing but a handsaw at home....a skilsaw using a tri-square as a rail would be better, but you definitely don't have to have a tablesaw....Home Depot will rip the 4X8 sheet of material into what you need to work with at home....am going to see this through to the end....massive amounts of power might be needed were the small cannons to be used in a starring role, but they are only going to be filling a supporting position, and I'm convinced this could be a real break-through for "effect" in my home theater.....