Bdierks
+1y
ok i have to jl audio 12W7s and i want to build a custom fiberglass box. now i was told that the W7 Factory box is made of 1 inch mdf. i was also told if i build a box out of 3/4 inch after a while it would blow the box apart. So do i need to build the box out of 1 inch mdf first, and then shape it like i want it to look, and then fiberglass it.