Hi,
I've got my KPA yesterday and the GAIN button has a strange behaviour. I let you a video : http://photos13.free.fr/KPA/
When I turn the button to the right to raise the gain, you can see that it starts to raise but suddenly, even if I continue to turn the button to the right, the gain goes down.
I asked a RMA to Thomann.
No luck, I started to play with a little bit and it's a real pleasure.