Today at the rehearsal I switched on my KPA and had a severe volume problem:
The volume went up and down and went away completely then came back again .
A restart and updating by my data stick didn't solve the problem .
After the rehearsal ( I played over a friends amp) I double checked and .. bam... everything was ok then...
The KPA was stored in a rather cold room for a couple of days. Do you guys think this could matter???