had a gig last night where I needed to play both upright and harmonica at a small venue. Took the Fishman Loudbox Artist, which is a very small Fishman amp, and put the upright through one channel, and the harps through a mic into the other channel. EQ'd completely differently of course. I checked with Fishman before doing this and they said I wouldn't hurt the amp, but it wasn't really designed for bass response. End result - sounded really good, people loved it. Will only work up to a certain size venue (it's an 8" plus a 1" tweeter, I think). But very accurate acoustic amp.