Ok my box i want to build is for one re audio 15 xxx my vol is 6.277 with sub and brace added the size of box is gunna be 17.75in high X 18 width X 45 depth 1 and 49.25 depth 2 its a lil bit of a wedge shape i want to do a side port tuned to 30hz in an L shape please help me out not sure how to...