On a serious note, and for anyone who is actually interested - it held up very well with a drummer and 4 (!) guitars.. I was adjusting volume down quite a bit...
No funny noises, no parping, and loads of bottom end. I suspect the k12.2 would have been far too much for the room.
I was originally going to run it out to the PA as well - but quickly came to the conclusion that it would be total overkill