one way, the speakers are in phase; that way, when someone speaks in a movie, the sound will be centered between the left and right speakers.

the other way, if you reverse the connections on one of the speakers, they are now out of phase.
the same person speaking in a movie will have the voice all spread out across the front stage, like the "voice of god" in old movies.
the sound comes from all directions at the same time, so it's not focussed.

good enough?
have a super day. :-)

Last edited by J. B.; 05/19/11 11:00 PM.