I know very little about the Kemper, but I’m struggling to see how it can do this unless the cab sim is always at the end of the signal chain?
Consider the following signal chain:
Input → Drive → Amp → Delay → Reverb → Cab Sim → Output(s)
If you wanted to have outputs without the cab sim, along with outputs that do include the cab sim, you could tap off those outputs just after the reverb.
Now consider this signal chain:
Input → Drive → Amp → Cab Sim → Delay → Reverb → Output(s)
If you tap off before the cab sim, your “cab-free” output won’t have any delay or reverb.
In this scenario, I can’t see how the Kemper can give you both an output that includes cab sim, delay, and reverb, and an output that only has delay and reverb, but no cab sim, because it would require two different signals to be processed by the delay and reverb.
Perhaps someone can enlighten me?