The link: https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-smsl-vmv-d1-dac.4375/page-13#post-118252
OK, the new board arrived today and spent some time replacing the old one with it. The work was fairly involved with some 30+ screws and desoldering/soldering the power supply wires. But it is done.
If you all recall, the problem was with unbalanced output using 192 kHz where we had a set of distortion components that were there with or without signal:
That caused the SINAD to drop by some 20 dB.
The new board nicely remedies that:
Note that the above is with 90 kHz of bandwidth (to go with 192 kHz sampling). At 44.1 kHz, SIAND climbs to 114.5 average as reported in the original review.
I also ran the jitter test since unbalanced performance was not as good as balanced: