Rockford has a boxwizard on their website. Go there, enter the internal or external dimensions and what thickness MDF you're using and it will calculate it all for you. for all of us non-mathmetitians
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98 Eddie Bauer Explorer with single 12W7: 7th loudest vehicle in PA: Sold
93 Gutted Greddy Turbo and Zex Nitrous EG Hatch: Sold
07 Caliber with 13W7 and 20's: Traded
08 Ridgeline with all JL system: Traded
94 343whp D16z6 Del Sol: Sold
04 VW R32: Doin' Thangz