Joe,

I purchased the standard unit with a single subwoofer. It does a lot more than I would have anticipated, and yesterday's job was another great example. I performed at a large retirement center, one that has a high stage at the end of a 100-foot long by 40-foot wide hall with high ceilings. The stage is just over 3 feet above the floor and although the room has lousy accoustics, the Bose filled the room with music, all of which was at the same volume level. Everyone raved about the music, the dancefloor was active and I had several positive comments from indivduals who said everything sounded so clear and crisp. I've run MP3s through a single channel and the results were excellent, despite the fact that the stero was combined into a single channel.

For my purposes, I don't need a pair of them, and the single seems to work just fine when everything is properly tuned--and that's the key to success with any sound system.

Good Luck,

Gary