I've recently had a problem with my Kempers sound deteriorating.
It starts off as a harsh top end then goes into uncontrollable noises.
I've tried different Guitars, different leads, different outputs and inputs and it still does it.
I've tried updating to the new beta and it still does it.
When the noises start I've tried unplugging everything apart from headphones and the power cable and it carries on making random noises without any input!
Just wandered if anyone else has had the same thing.
I've e mailed Kemper. Just waiting for a response.