Turns out the Yggy is an extreme high-resolution performer, from plain Redbook CD. This may be the last DAC you'll ever need, Dan. I had already heard in another, superb and very expensive, system that the Yggy excels in separation of musical lines, instruments and instrument groups, which is the most impressive in large-scale orchestral music. Climaxes build and build, harmonically complex layer upon harmonically complex layer, and the Yggy just keeps on going undisturbed, without any congestion whatsoever.
Now I can add another aspect to the story. Timbral resolution is top class, and can easily compete with the very expensive top vinyl that I have heard in other people's systems. Since a few days I have Reference 3A Reflector monitors (their top model), which are an extreme exercise in suppression of cabinet resonances that can blur detail. With the sensational Octave R320 amp (with KT150 tubes) on loan from my dealer in the chain (soon to be bought, or the Octave monoblocks), I discovered uncanny resolution on solo violin, perhaps the most difficult instrument to reproduce in terms of micro-detail on sustained notes and of transients. I could not believe the enormous similarity to live violin sound, even though of course the ultimate live realism is still not quite reached. I just did not think this was possible from a stereo system, and certainly not from plain Redbook CD! The speed, accuracy, transparency, sheer amount of micro-detail, and the naturalness of the extremely complex transients between notes that are due to the bowing of the violin, and as reproduced by the Yggy through that amp and speakers, have to be heard to be believed. This now firmly establishes the CD medium as an extreme high-resolution medium for me. The recording that blew me away was a 1980 analog Philips recording of Gidon Kremer playing Bach Partitas and sonatas, and released 1990 on CD. Thus not even from a particularly 'audiophile' label, and not with the newest AD conversion technology.
And that from a $ 2,300 DAC? Robert Harley is right when he says in his review that the Yggy is one of the greatest bargains in the history of high-end audio.
Add to this the impeccable rhythmic drive of the Yggy -- among the best I have even heard from any source, analog or digital -- and the great bass, and obviously you're all set. I agree with Joe Whip, I have yet to hear a better DAC.
The Yggy is really worth the highest resolution system. I checked that violin recording with Quicksilver Silver 88 monoblocks (also with KT150 tubes) inserted in my system, but while the amps are really very good and in their own right gave an impressive rendition of the violin, the shocking level of resolution heard with the Octave amp in the system was just gone.