I apologize if this has been covered already, but I didn't see anything doing a quick search. I run my Kemper through a powered mixer and into two passive speakers. I typically play a Hagstrom guitar. Historically I've had no issues with noise whatsoever, unless I to the coil tap and go to single-coil mode. When using the humbuckers, the rig was insanely quite! It was perfect.
Yesterday I move the whole setup literally 5 feet to the left along the same wall, using the same outlet. All the sudden, the noise is terrible, even with humbuckers. I did note that when using a clean profile (gain very low), I the issue doesn't exist. It gets steadily worse as I turn up the gain knob in any profile. Also noteworthy is that the problem is the same whether I'm using headphones or the PA.
To troubleshoot, I moved the Kemper to the other side of the room and the problem went away. I'd like to avoid moving the whole rig again if at all possible, for a few reasons.
One other thing to mention is that the electrical breaker box for the house is now just a few feet away from the rig...I'm wondering if that's the issue. Lastly, I did tinker with the ground lift buttons on the back of the Kemper.
Any ideas on the issue???