To use Kones, you may need to flatten your Monitor Output EQ settings, if you have altered them to compensate for a guitar cabinet, and also start with Rigs that have not been EQ modified to suit your old cabinet.
Kone = On, Monitor Cab Off = Off puts the Kone in Full Range Mode. Christoph Kemper has recommended aiming the cabinet like a monitor, toward your face, to hear it in Full Range Mode.
Kone=On, Monitor Cab Off = On puts the Kone into Imprint Mode, and bypasses the Rig Cab module. That should give you optimum results with Studio and Merged Rigs that have not been previously EQed to compensate for a conventional cabinet.
oncehuman- here’s a quote from Paul earlier in this thread.
I don’t have a Kone, but it sounds like monitor cab off is FRFR mode.
Monitor cab on is imprint mode