I got my DM+ the 28th of December last year and sadly returned it a few weeks later due to a strange humming from inside the case (not the power supply). :(
The swapped unit I got is still playing along and am now feeding my Denon AH-A100 headphones or my NAD C245BEE power amp and various speakers.
Am currently running it in USB A-B 24bit 192KHz mode, but have also tried mini-toslink to toslink from my Mac.
When I bought it I had just sold my Arcam rDAC and NAD C165BEE preamp/headamp because I wanted something simpler and smaller - one thing I noticed right away is that the DM+ is a fair bit brighter than my previous combo but also a good deal faster and more responsive. So overall I am really satisfied with this DAC.
I would though like to get just a pinch of the warmth back and am wondering if Coax would be an idea...
What I specifically have in mind is to buy the newly released m2Tech HiFace2 and bridge to the DM+ via a VDH DigiCoupler 75 I have laying around. What do you think, what difference would it make compared to using directly attached USB async in 24bit/192KHz mode?