Long story short, I did open the player and took a bunch of photos, but decided I want to try it with a tube output stage - see here:
Tube Output Stage for the HD 990
I did not eliminate the stock H/K output stage - it can still be used when needed/wanted.
Will follow up with the review of the stock player in a few days.
P.S. Interesting thing. The price in Europe had risen for about 40% once several good reviews of the unit started popping up. And while it is still a good buy, wish it was still available at the original price - I paid EUR 280 for it.









