I am starting to notice a tendency (when creating profiles) for the KPA to sometimes add shades of the dreaded 'cocked-wah' tonality

that the GT-10 was plagued with. Perhaps it is the frequency of the 'Definition' boost? (I notice it mostly when the Definition parameter is set past 4 or 5). A lot of the Marshall profiles are full of this, noticably more than the actual amps - IMHO, of course.