Hello.The Kemper stage has a very strong noise at the entrance, when the tool cable is missing, there is no background, and as soon as I insert it, there is a strong itch.I checked different guitars and wires,but nothing changed.The noise is present on clean and overdriven sound.Input sensitivity levels are set to zero, by default.Firmware version 8.02. Can you tell me how to solve this problem?Unfortunately, writing and playing with this background is impossible.With respect , Sergey!