yeah i know but the box design I have wont fit the sub it at all. Its not close to deep enough. I would have to build a big ass wedge box and leave my passenger seat screwed and middle seat out.you can use the 18 in 4.5 cubes, 3 10s are probably going to need a bigger box than that.
Wrong.length of port x OD of port x 3.14 = XThen divide X by 1728
The slant won't affect it as long as the port doesn't touch the baffle. Make sure you leave a port's width away from the bottom of the box though.also, is it possible for me to port out of the top? Or will the slant have an effect? I would have to leave some port sticking out because the box is only 21'' tall