Sorry chaps, I'm gonna defend AdamMassacre1981 here....
I'll playback the story as I see it....
He has posted this issue a number of times and has been pretty open and persistent in testing things and suggestions.
He engaged support ( can't comment if this was a positive experience by both parties) but support helped by providing the re-amps, suggesting its NOT the unit.
Conversely, a couple of re-amps without the perceivable problem suggest it IS the unit. He has also tested with multiple guitars, tried many other suggestions.
EQ is not the answer, its masking a problem, as we can all hear it, just can't diagnose the cause.
Just so everybody knows, there are NOT many local stores that stock a KPA in the UK so just going and trying one isn't always that easy. Even then,
1) If it has the same issue, what is the solution/answer - are you likely to even be able to get the same set up in a guitar store??
2) If it doesn't, does that confirm there is an issue when support don't believe there is
Yes, he should have addressed this under warranty years ago, yes, but he didn't so is trying to deal with it now.
Sending the unit back to Kemper would definitely close out the "is it a faulty unit" but because it costs money and time, I think I'd want some convincing that was worth it, especially as Support don't believe its a faulty unit.
This has been 8 pages because we have not accepted he should leave the tried to help and he has positively engaged
I hasten to add ( AdamMassacre1981 - not sure if you agree or I'm getting you confused with someone else) that in the past he may have not been as positive in responding, but this thread has been very cordial as far as I can see.
I honestly have no idea what the problem is - I think its not 1 thing TBH, but I do understand the frustration as I think we have all had something go wrong ( like a car) that has been really difficult to resolve.
Just felt the need to comment....