I am not sure if i got your question right. So here again is what do to:
In the "X" slot of the Kemper, load and activate the "loop stereo" effect. No need to change the settings.
Connect the KPA direct to to Mimiq mono in. Stereo out from the mimiq to KPA return and alternative input. That should be all.
The firmware 1.1. is very important since it fixes most of the phasing problems of version 1.0. Please read the manual carefully how to update. I did not not and update failed. There is a special procedure needed before attaching the mimiq to the usb port.