When it played downward (magnet towards roof) it vibrated more. I have it now playing into the corner and port towards the other side and it sounds much louder to the ear. When faced it towards the rear doors it wasnt as loud.

But then again i didnt try both ways. Still unsure if an inverted sub fires the opposite direction. Maybe face the sub towards the Wall and the port towards the door? Id have to build a new box, but that's not an issue. Just working with what i already have.

Cant seem to find it now, but I once read a post that said mid van facing the side doors.