Good question, gents, but it is a bit off the mark. My issue is on the front end, a bit different than the issue you raise. To wit, I have compared connectivity from my Codex between RCA ICs and very cheap Monoprice XLR connectors ( my Don Sachs preamp accepts both inputs) and could discern zero difference in SQ. Maybe better XLR cables would lead me to different conclusion. The Codex is set to accept the digital input from OPPO.
I appreciate your input.
I appreciate your input.