My box is 50 wide about same depth and 17 tall. Trim ur back brace off 3" from bottom then use panel bond adhesive and glue a piece of steel angle iron across the back and foam the cavity. Its strong as hell this way. You won't regret how loud you will get with this box. You can fine tune the port till it suits ur music and change back to any tune with a new tube. Menards carries 6" pipe 20 bucks 10ft stick. Its currently about 2.5 cubes 33 hz. My buddy owns a cabinet shop it was made there. Its coated with fiberglass inside and has a brace 4 " from sub its strong and solid. 100 plus shipping its yours.