If you have traps, vertically in each of the four corners of the room, you'll be absorbing pressure waves forming the modes for the length and width of the room, but not height.

If you can play traps around the entire perimeter of the wall to ceiling interface you'll be trapping height, width, and depth. Albeit, the width and depth with half the efficiency of the floor to ceiling corner traps.

If you can also do the corner where the walls meet the floor (maybe not everywhere, but 50% or more), you'll be getting all three major modes better than you can with just the traditional corners.

Triangles made from 2'x4' rock wool, cut in half and than diagonally would work really well in this application. You'd just need a lot of it, though the cost wouldn't even start to approach that of the manufactured TubeTraps.


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris