Is the fizz on any other profiles? I don;t eq any fizz or artifacts out of anything - not necessary...which suggests there is another problem.
Do you get the same issue with Headphones?
I haven't tried any of the speaker imprints beyond the V30, the Greenback and the Creamback... and it's present on all three. I use In-Ears for one of my bands and the sound is awesome... no fizz at all. The fizz is only present in my cab with Kones