Two years had passed since my original review. By April 2022 the world was on Covid v3. Or was it v4? Certainly 27'000'000 Shanghainese were on strict lockdown for their second month to approach serious food shortages. Ukrainians were fighting for their lives or had become refugees. Supply chains across most industries were jammed. Most unhappy days. Yet our small band of sound connoisseurs in Taiwan had quietly improved an already award-winning machine without any price increase. No less will do than grandfather v2 into the original award.
That review already told the tale. Today was a more casual revisit and attempt to peel out the differences in absentia so by sheer triangulation. Such things can never become pure gospel. They're closer to gossip. I simply consider mine a quite educated guess given ongoing ownership of the very first COS D1.
Or as COS themselves put it about the D10 v2, "the major changes are a new sub 0.1ps jitter oscillator for the converter so by a full magnitude better; improved regulator and bypass capacitors for this oscillator; a lower-jtter TXCO also for the streaming module; and a new power transformer for the analog circuitry. That supports 110VAC all the way up to 240VAC so wastes less energy, creates less stress/heat with a more efficient iron core, thicker coils and a special winding topology to further lower emitted noise." If I'm correct, that has retuned the deck's voicing. With it the company's house sound has shifted a bit more into the 'organic' 2nd order THD camp to turn slightly away from the original quicksilver.