Crackle with 'MR Z MZ-38 ' amp Preset

bossredman

Inspired
I notice something strange the other day after switching guitars on an old clean Preset of mine running a MR Z MZ-38 amp.
I usually play that preset with a Tele, but whilst I had my Epiphone Dot plugged I played the same preset & noticed a "crackle/horrible distortion" sound after the initial attack. Even if playing really lightly.

Input & Output levels appear to be OK (ie no Red's).

It is evident through both my Adam A5X monitors & headphones.

By a process of elimination I narrowed it down to the Amp block.
But even turning the gain/output down etc it was still there.

Eventually, I found that the only thing I tweaked that appeared to make any difference what so ever, was to change the Tone Stack Location from POST to either PRE or MID.

Does this make sense?
 
I noticed something similar on my Axe FX II MkI recently, but I haven't had time to go through the process of elimination. @bossredman, keep us updated on your progress. I'm hoping to get some time to trouble shoot mine this weekend.
 
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