Today I have played a lot with the KPA, and sadly discovered what seems like a huge shortcoming of the unit. Try to select a high-gain profile. Play a very high note and let it ring. While it is ringing do some chugga-chugga muted low notes. It seems to me the high note completely chokes the low notes. The low notes only start to bloom after the high note dies off. This is not a subtle thing, it is very noticeable on my machine. Christoph?