Same issue with the 360. We finally figured out the sonos and Hegel puzzle. Coax out or optical out from sonos to coax in or optical in Hegel. Had to switch to fixed versus variable on sonos settings. Fixed provides better sound quality but you cannot use your iPhone to control the volume or eq. Variable required volume on the Hegel to be set at 75 to work but allows use of your eq and volume control. Sound quality on fixed appears better.
