Why should they be walled? I'm just curious here. What would he gain from going subs up/port back like it is now, to going to a wall? Kef It's a giant long box upfiring, so the space above the box is useless, it can't be used for storage or anything, its just more cabin that needs to be pressurized. So if you walled it off, that area would be used for the enclosure and the overall cabin would become smaller, therefore it would be a lot easier to pressurize and get louder, and you wouldn't lose or gain any storage space. Stefanhinote, your a mind reader!