Bright, but not analytical. It seems to resolve better than my Bifrost, and instrument separation is very good. MIdrange seems excellent as vocals through my LCD-3's really shine, and so far the TH-900's do not seem to be demonstrating the recessed mids some complain of, and were evident to me with my LA7000/BiFrost pairing.
So far I'm really liking the UD-501, and the headamp drives the TH-900 beautifully.
Interesting, thanks for the impressions. I was getting the impression from people that it was leaning towards the darker side of neutral. How would you say it compares with the Bifrost as far as imaging and soundstage?