Bailey35

The 3.2 cubes is after raising the seat 2.5 inches. And that's based on an outifre box not a downfire. Downfire costs a lot of volume because of the space needed between floor and sub.

internal volume of the box is 3.2 cubic feet without including sub and port displacement. So I'm assuming maybe 2.5-2.75 cubes total. That's about 1 cubic foot too big according to sundown audio website. Is that way too big? I guess my question is, is there an exact number over recomended that is "too big" I have the kx800 amp that's 800rms but has a certificate stating it's been tested to 940 watts. Really appreciate all the feedback I'm getting. Thanks everyone

I had a sealed box with 12's previously and there is no where near enough volume for 12's under the seat. The box in that video was probably less than half of what 12's require. That's why I was looking to switch to 8's that out fire rather than downfire but even with 8's to out fire I need to raise the seat atleast a half inch or so unless I want the box to stick out from under the seat. As far as I've been able to find out 8's is the best option for under the seat in this truck. Anyone have any other opinions? Or designs?

trying to build a custom box for 2 sa8's on 800 watts rms. The max size of a box I can get in the space I have is 3.2 cubic feet (not taking into account port and sub displacement) and for 2 sa8's sundown recommends .5 to .75 cubic feet. So for 2 I would need only 1.5 cubic feet. How does building the box bigger than recommended size effect performance? The box is going in a 2011 crew cab Silverado, ported, out fire. Also with this being said only having a height of 11.5 inches to work with could an sa10 work or would it be too close to the edges? Also considering the box angles downwards toward the back woukd mourning depth be an issue with the 10's? Also how would selaed 10's in the right box compare to ported 8's? It looks like selaed isn't recomended on the sa8 or 10? Thanks