what headphones are you running? It sounds like you may have an impedance mismatch where the headphones have too high a load for the interface’s headphone amp.
Oh right, I didn't think of that. I am using the DT 990 PRO, they have pretty high impedance wth 250 Ohm. They sound marvelous though through the Kemper, is there a better way to solve this? Get a different interface?
Thanks!
e/ The volume of the heaphones listening to my MacBook gets veeery loud though, which is weird (through the 8i6)