Thanks for that, its more about the level of signal hitting my monitors, I run my Kemper three different ways.
1, home use and online teaching, for this I run from the Kemper's quarter inch monitor out into an interface and into two studio monitors (It's this application where I find I'm getting some buzzing, especially in the low end and more high gain profiles, like its peaking, but it's not that loud.)
2. Live, where I run it into a 2 x 12 cab at 4ohms with two celestion FRFR speakers that are 200 watts each.
3. I occasionally run it through the effects return of a 100 watt Marshall and a 4 x 12 cab from the monitor out and turn off the cab sim.
I'm just wondering if I would get a better result with mainly options 1 and 3 if the monitor out signal was -18 rather than -12.
Thanks guys, appreciate your advice.