Some of the many comments I read about the Bose S1 that I decided to pass....
I think the niche market is guitar vocalists in small venues ... like coffee houses, and speeches, and background music. It's probably great in those settings, but I don't believe it was ever intended to offer a scaled down version of the Compact. I think I'd use it for acoustic guitar, but I doubt that I could justify it as a legit KB setup.