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.

How critical is this test? Even with mismatched speakers there will
be some bass cancellation and with perfectly matched speakers, there
will be almost complete cancellation. The only real way to determine
whether there is a mismatch, aside from trusting one's ears, is to
measure the output.

Kal