Pro Audio Support

Q:
Digital I/O
 
A:
The Coax Digital I/O uses a bastard 1/8" TRRS four conductor jack.

Tip is Input White RCA on Denon cable

Ring1 is Output Red RCA on Denon cable

Ring2 is Output Shield

Sleeve is Input Shield

You may use a common 1/8" TRS if you're not concerned about ground loop issues.