... didn't try. What I did try though some time ago was replacing the originally supplied power supply (the switch mode PSU) with something different. There was a change in sound, though I don't remember if it was all better.Anyone with experience of using an Iris with an ADI-2 DAS FS? Is there a worthwhile improvement or does the FS clock already do the job well enough?
My trusted HiFi dealer told me that putting a better PSU in front of the RME DAC improves things. I would give this priority over a DDC, since the RME seems to have pretty good jitter rejection anyway, but its analog output stage would probably benefit from better DC with less noise and ripple.