Wait, isn't that the same effect as a mono signal with one speaker wired backwards? If so, that 'head-swimming' sound that results is awful, and the out of pha

Wait, isn't that the same effect as a mono signal with one speaker wired backwards? If so, that 'head-swimming' sound that results is awful, and the out of phase drivers will kill much of the bass response. I'm very surprised that this trick was ever used in industry; after all, if someone listened to that old film on a single speaker TV, the signals would sum to zero and you'd have no audio at all! (And yes, our local cable company has managed this very stunt from time to time...flip to mono and the audio goes away.)