I should also mention that I would definitely not be using the system in the intended configuration Bose suggests (behind the musicians). I would set them up in a traditional PA placement on stage. So the question remains, would this kick out enough spl for a full band?
One thing that you HAVE to consider with this (and other systems like it) is the MOUNTING HEIGHT of the speakers.
They have a very narrow vertical coverage pattern.
If you do not get them high enough-then the coverage will not be what you would want.
To low (ie not above people heads) and everybody will be out of the pattern-so it will sound muddy.
To high and the people will not hear the direct sound of the upper freq-but they will hae lots of reflections off of walls and will sound "echoy".
Proper placement is ESSENTIAL for these products.
Yes they will "make sound" when placed anywhere-but not as good as it as it could be when at the right height.
The height is much more critical than with "point and shoot" speakers.