On Sun, 11 Mar 2007 13:16:09 GMT, (Don Pearce)
wrote:

Now, is it really weaker? Put the speakers face-to-face, as close as
you can get them. Reverse the phase of just one of the speakers does
the bass vanish? If so, the speakers really are equally loud, and you
have some asymmetry on the room.

"Vanish"? And wouldn't it still reduce if one speaker was a few dB
up?