Not sure if the box they are in is prefabbed or not. I dont believe it is and iv seen plenty of prefabbed ones to tell the difference. This one is made out solid thick heavy *** wood. The box is only .6 cubic ft per chamber sealed. Tiny box but weighs roughly 35-40 lbs and the terminals are on the top/bottom. If subs are facing you and not up. Bu idk. Thought about going ported tuned to 32 hz but wasnt sure how theyd sound.We could definitely build you a new box out of curiosity are they in a prefabbed box now