Your "poof" surely has nothing to do with any profile..... Electronic devices can break, a tube-amp, too, I once had a Boogie Rectifier breaking down at soundcheck. On a concert I've been (Gary Moore) his Soldano SLO100 began to smoke ect.
The KPA is solildly built in Germany and not made in China, normaly KPA's are very reliable. My main one (toaster) has been on several tours and I use it all the time, not one problem. Nevertheless if you have bad luck everything can break, but Kemper is known for a fantastic service.
+1
I have had mine for almost two years and no problems experienced whatsoever. I do have a tube rig too. I am in both camps as they all have qualities that I enjoy.