I was thinking about redoing my sub box to something different and was wondering if anyone had ever built a 4th order or 6th order box for a 12w7. A little about what its going in, I have a acura CL that has a crawl through (for lack of better word) into the trunk area behind the arm rest in the middle of the back seat. I figured if I could build a 4th order box I could make the port line up through that crawl through. I am not good at designing boxes so figured I would ask if the 12w7 would have any deficiencies that would not work well in this type of enclosure before I went any further. These type of boxes would be about the only way that I can think of to have the port in the middle of the enclosure to line up with the crawl through. The enclosure the sub is in now does very well the way it is but just wanting to do something different if possible