need specs for a box for a alpine type s sub 12 inch i know it need to be 1.5 cubic ft but need actuall measurements for it

1Ft (W) x 1Ft (H) x 1.5Ft (D) Of course that isn't gonna be physicall big enough for the sub, but you need to measure how much of your boot you want it to take up (ie max dimensions you want it) and go from there. And it depends what shape you want it too (you could go 40cm x 40cm x26cm and that would be close enough to 1.5Cu Ft - just as an example). You just have to make sure that the cubic capacity ends up being as close as possible to 1.5 cubic ft (42.5ish Litres). Some original photos have not been recovered yet.

thanks for that