Having used my KPA live for about 18 months through a regular 4 x12, I finally ran direct into FOH and used a monitor for my on stage sound...hooray!!
I have to say I could not have done this without a monitor at home to set my sounds so this was essential and the main barrier to date so very glad I did that. This helped find the right profiles ( along with the suggested profiles from forum members - thanks to you all!)
So, did I get a revelation in sound? Nope....... it just sounded as good as my cab - BUT that is what I wanted. I was worried what the sound man would think and true to other people's experience, both ( I've used 2 so far) have been extremely happy, despite initial scepticism ( you want to go direct??).
So my conclusion is...the Kemper sounds amazing FRFR OR through a regular cab.
But now I don't have to lug a 4 x12 with me...my car and back are both very happy!!
YES!!!