Plus ONE...Fishman is trying to capitalize on the Bose success without the Bose technology or price. For small guitar gigs it would be fine. But may as well spend more and cover ALL possibilities

Or spend less and keep what you've got (which will be VERY likely to sound better than this!)...

You've got to remember... you are NOT a keyboard player!

You are a drummer and a bass player, too. Take one of THEM along, and ask them whether they'd be OK playing through one of these. Then stand back

Why do you think Bass players don't play through a few two or three inch speakers? Why are kick drums 20" and up? Physics...

It sounds great for guitar and vocals ..... that's it's purpose. For kbs...you'd have to stay very quiet and live with only moderate bass response.
I advise to pass on this if you do a OMB deal.