ya im posting this in accessories just because i cant seem to seem the "subwoofer" heading or the show off your stuff one.. so ill post it here lol, ya this is my box design its just rough done on paint i designed it from the alpine type R specs for ported enclosure for their 12" and i did the best i could to use their dimensions that make a 1.3 cubic foot enclosure... if the measurements are off my appologies im canadian and we are in the metric stuff lol.