15'' woofer l7 port box

Hit this web site up, to know how much to port your box http://www.the12volt.com/

3/4 hd partical

mdf

3/4 mdf or hdf works good. Be sure to brace internally. Never use particle board or plywood, the glue can delaminate with the temp and humidity changes in your car.

sealed is alot more acurate and still hit hard as hell. Ported is a lil louder and moves more air. But sealed sound so much better