After more listening, and +3 dB low shelf boost at 40 Hz in Jriver 31, I have discovered more about how these sound.
Now, I am almost 70 years old and I can only hear up to about 12 kHz. So there's that.
After listening to a number of different recordings ( all Red book FLACC ) I noticed the following:
- On certain recordings there's a VERY natural open sound that I have not heard before, really. Some subtlety to that, but there it is. This is mostly on classical, small group jazz, world / folk and some blues that is recorded with care.
- On some electronic music - William Orbit, for example - I heard some really extended treble at times in the production. Not natural, but with electronic studio productions "natural" doesn't have meaning. THey stuck these sounds in there and I can hear them, not in an exaggerate "bright" way but they stand out as separate elements in the mix as opposed to being blurred into the overall sound. EVERYTHING in the mix is "separable" when listening. I can hear it all and focus my attention on separate elements in the sound if I like.
- Something else is true with the Corinas that I have experienced with other top-quality 'phones: distortion is vanishingly low in level, and this tends to allow me to turn up the level more than I should. We become so used to distortion in sound reproduction that we tend to use it unconsciously as a gauge of loudness. But with a low-distortion transducer and playback chain, well, you turn it up TOO loud and there is still no distortion to speak of..... I have to rein in my SPL lust.
So, now, my opinion regarding the Dan Clark Corina's vs. the Dan Clark Stealths, now that I own both. The Corinas are a bit more open sounding, with not quite the same bass level. Bass extension is there, but the Corinas benefit from a little EQ down in the bottom octave. I think that the Corinas are also more revealing of any flaws that exist in the recording - you can really hear how some production is just "overcooked" and in a sense overcrowded with sounds that just don't work together.
Great headphones. Glad I got them.