[bpape]

Well, corners are generally the most efficient since they're at the end of all 3 dimensions. However, in cases where your seating is back in the room, you're still at the end of the height and length - and likely at 1/2 of the width so you'll get the harmonics of that dimension.

From a decay time standpoint, it'll work pretty much anywhere and having it away from a boundary allows 3 or 4 sides to be exposed for additional efficiency.

Bryan