Alright guys, i'm now about to work on the box...It's going in a tahoe, and the recommended is 7.5cubes @ 30hz...I'm not sure whethever to do sub up port up or sub up port back. Any experiences with a tahoe at all? curious as to what might sound better...I just need an idea... I'm not exactly sure on the box, as well? Anyone have experience with the box for a daily driver? I'm not sure how to calculate the dimensions either...Thanks guys..