In small rooms the left and right channels bounce all over the place off the ceiling, walls, back wall, left wall, right wall. Anyone in the room will hear stereo.

Think about this. If the sound is bouncing off the walls, ceiling, floor, then it is all combined into a single sound--MONO! The sounds are traveling at 5,280 feet per second. If those speakers are facing forward, which is the usual position, draw an equalateral triangle from the speakers and that is the area in front of the speakers that hears stereo. If you are to the left or right of a stereo speaker system, you cannot hear balanced stereophonic sounds. The band members are standing between the speakers, therefore they can hear stereo sounds, especially if the speakers are positioned a short distance to the rear of the performers. However, the only person that will hear a perfectly balanced stereophonic sound is the person standing directly in middle of the triangle. The best advice I have for anyone that has any doubts about the Bose PAS system is to take advantage of the 45-day Bose PAS trial, set it up, try it out, and be objective. Let your ears, and the ears of your audiences be the judge. If you don't like what you hear, send it back to Bose--they'll even pay the freight both ways--no questions asked.

Esh was talking about phase cancelation, which can be a problem with a few, stereo sampled voices. Putting a bit of common sense logic to this, wouldn't phase cancellation be a problem with any amp that combines the keyboard's stereo output channels? Hmmmmmm! This means that most of the mono PA systems would reproduce the problem if the keyboard's output were routed into two inputs of a mono PA system. Something to think about.....

Cheers,

Gary

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Travlin' Easy