Those are indeed great results, with really low noise, but still I'm curious: Did you test to see if using the "Pure Direct" feature bypasses the digitization of analog inputs, like I believe is the case with most of their units in the past?
[In some reviews I can figure this out on my own by looking at an extended range frequency response curve that goes well beyond the audible band, due to the sampling rate limitations only found with digital, but I didn't see any such super high freq. response curves in your report. Thanks.]
I think he did exactly that, you can see it in the graph below:
The AV10 seems to be the AVP to beat now, in terms of bench measurements. This is a case that can be used as an example that shows the use of a better DAC IC does not always guarantee better overall pre out SINAD.
In that measurement, it beats the Anthem AVM90 (same list price) that uses the ES9038Pro, one of the top/flagship ESS reference DAC, whereas the AV10 uses the slightly lower model, the ES9018K2M.
The Marantz DAC IC's SINAD is 2 dB lower, and DNR is 5 dB lower, but the results is expected because both DAC's specs are so good, SOTA class so they are not the weakest link in the audio chain anyway.