I concur 100%. there are places in which the kemper, while sounding superstar at home, sounds like garbage. for example, I gigged at the Hard Rock Cafe in Florence, couple of weeks ago. the place's acustic was so bad the kemper was almost not playable. I had to anyways but it was a torture because I had to play a very hard and difficult repertoire.........with a smile on my face!
as a matter of fact, I'm thinking about having a plan B for places like this, which will comprise the use of an ISO box (hooking the kpa into the return of an amp) since I'm tester/demonstrator of a magnificent one (the montarbo iso box).
in places like the mentioned, there is no way to have the kemper to sound good, either on a poweramp or into the consolle........the use of an isobox, being virtually sealed, solves all the acustics trouble.