I got the wood today to start building my sub box "3/4 cabinet grade birch plywood" for my Polk MM124 sub, and Iím sitting here calculating the dimensions to fit in my truck to get 0.88, so the measurements I get are 7.5"x16.5"x18.5" outside deminsion, which gives me 17"x15"x6" internal, and that comes to 0.885 cubic feet.
So to make sure 6" depth was going to be ok I pulled up the specs again for the MM124 on Polk, and ran into their sub box plans for this sub http://www.polkaudio.com/car/toolbox...plan.php?id=61 . They are saying the overall demensions should be 17"x15"x10", with internal demensions at 15.5"x13.5"x8.5" my calculations put this box at 1.029 cubic feet.
Now they say use minimal polyfill, is that suppose to get it back down to 0.88? Or am I calculating the volume wrong. Or did they misprint it.