Is this what you are talking about?
http://www.bose.com/controller?event...plugged_in.jsp
Appearantly, you don't need monitors or big PA speakers, This serves both purposes. Great concept if it works, I've never heard this outfit in person, but comments on other muscian type forums have been very positive. I've heard no negs. Here's a thread from a steel guitar forum:
http://steelguitarforum.com/Forum11/HTML/004409.html
Scroll down to Mark Van Allen's reviews.
Dave Little