Wild. I've had the complete opposite experience with the HR 108 that I bought a couple of months ago. Wished your experience was better! Things I've learned/done so far:
- Headrush is up off the floor, on a table beside me. Helps kill that bottom end thump.
- Kemper Low Cut @80hz & High Cut @11k.
- HR is in Flat mode.
- Profiles tend to need a bit of increased top end EQ for the HR.