Don’t know if this helps, but I did a quick config swap using the same settings as you (as per post#17), with nothing connected to the phono in. My 440 has the CI board fitted. I got this result:
Good luck with the troubleshooting.
Good luck with the troubleshooting.
Oppo BDP-105 - Roon lifetime - Dutch & Dutch 8c - Fiio R9
South Coast England

