DC xl 12 box design help

[Treycann10]

 

I need someone with great knowledge of D.C. Subwoofers to design me a box for a single xl 12. It will be going in a 2012 f150 supercrew. Will be listening to mostly country and rap. I have a dd m1c powering it right now. Roughly 1700 rms (rated). I will eventually upgrade for a m2b which is 2400 rms rated. I tried to build myself a box and it doesn't sound good and has a lot of port noise. Current box is 22x18x14. Double baffle, 45s in corners, 6" full length aero. has to much "hissing" noise

[Triticum Agricolam]

On your current amount of power a 6" aero is a bit undersized, which would explain why you were getting a bunch of port noise.  You were probably tuned a bit on the high side, do you know what your tuning or port length was?

What are the max dimensions you have to work with for a new box?

[Treycann10]

max dimensions are 22x18x15. The aero is about 17" long. Which put tuningaround 41 I think. I want tuning around 34 but that gives me a 27ish inch long 6" aero and that's not happening. With such a small box it's hard to tune low because the aero ports need to be so dang long. Except for a 4" but that's probably way to small. I don't know.. just want it to sound good mainly playing rap