I don't have the Kat MKII 100, only the Artist. Waiting on a speaker cable to connect Monoprice to the Artist speaker.One more test to try: Katana MK II 100 into the Monotone speaker in the Monotone cab.
Or: Monotone speaker in Katana MK II 100 cab?
You may find that the only difference between the MK II 100 and the MK II Artist is the speaker and the cab. I really wish the MK II 100 had a MIDI in jack and more preset locations.