I just bought a mtx thunder 8000 10'' sub. And it won't fit in any box. I just got back from a car stereo place and it woulnd't fit in any of the 10 inch boxes. It has these things on the side that stop it from goin into a box. Has anyone else has any exsperiance with this speaker? Am I gonna have to cut a 10'' box out to like an 11''? Thanks alot in advance.