Sorry if it is not clear that I am using the google translator :).
I have a problem with the Kemper, it sounds radically different if I plug the headphones directly into the Kemper than if I connect them to the audio interface, it sounds much worse on the interface. I have an audiobox 44 vsl and I connect the kemper of the main output to the mic/line input (I've also tried the mic/instrument). I don't understand why I can't send the same sound to the audio interface as to the Kemper headphones, the sound I hear via headphones through the Kemper headphone output is infinitely higher than the one I output to the card. I need help