I have had the D90 MQA for 2 weeks - but it is being returned this week. I bought it to hear fully rendered MQA but the darned thing only does that through its USB input -- not Coax/BNC SPDIF or optical. :(
As a non MQA DAC, say, streaming HR Quboz, it sounds very nice. Sweet high end, spacious, great on transients. Definitely a lil more silky than ESS Sabre sound as I remember it, though I did not have one on hand to A-B back to back.
This being said, the D90 doing non MQA is not discernably better than my Chord 2Qute/Qutest or RME ADI-2. Obviously the RME has a very similar AKM chip, so there is a family resemblance.
As a non MQA DAC, say, streaming HR Quboz, it sounds very nice. Sweet high end, spacious, great on transients. Definitely a lil more silky than ESS Sabre sound as I remember it, though I did not have one on hand to A-B back to back.
This being said, the D90 doing non MQA is not discernably better than my Chord 2Qute/Qutest or RME ADI-2. Obviously the RME has a very similar AKM chip, so there is a family resemblance.