Their is no cancellation the different subs are on their own amps with different crossover settings and firing different directions .I went for SQ rather then SPL because I like Rock the best and like a tight bass. I have the 15" type r in a 1.75 cf box with about a lil over pound of Polly stuffing.Not the best choice for a type r 15" but had it and wanted to use it somehow .Seat belts Yeah, I have them and angeled the back with the shoulder straps but would this ever really be safe for anyone? I wouldn't want to be strapped to it in a crash .As for the carpet look I do plan on padding and a leather look down the road and look like a seat .But just don't know about seat belts do to safety in the first place .The amps have more air than ever the back 1/2 is vented at the sides top and bottom I can even do a small fan to move air around once I add my LEDs inside the amp wall.Thanks for the cool comments and questions .

 

Interesting install, its probably very loud. What crossovers are you using? Different size and different model subwoofers is not a good thing if they are playing the same frequency range.

 

well I don't do comp or anything so mixing sizes and models is not a big deal. I went with type E because I wanted about 250 watts each for mid bass on a 2 ohm 500 watt mono Alpine amp I picked up dirt cheap and wanted a SVC sub .And got a great deal on them too . but I have the 12s at a mid bass range and the 15 at the lower end bass range .just using the crossover on the amps them selfs for the cut off points .I don't see the need to add a more complex crossover. The bx12 helps with control as well It sound pretty good and tight can make it pound if I need it .I think its about the best sound I can get working with a truck cab that is completely sound deaden .lol my rear veiw mirror shaks a bit now and I never seen that with my last set ups witch started out as 2 EDs 10 inchers under the seats.lol