All right guys, I need some help designing a box for my soon to be 15A....I can't fit the dimensions suggested, so lets say something smaller than L30 x D17 x H15...after port and driver displacement I would like it to be 2.2ft ^3. Please help me design...I will build it, I just need some help getting started. Thanks

EDIT: I would like it to be tuned to about 28-30Hz