Magic, numbers I don't know. The best I've heard was not a room. It was an ampa style indoor theater, in Aspen, Colorado. Back wall retracted. That was a wonderful, setup.. Krell.
The worst 8x8x8, 9x9x9, 10x10x10.
Regards
The worst 8x8x8, 9x9x9, 10x10x10.
Regards