This concrete video: https://www.youtube.com/watch?v=SMAq1KrJ0rQ The sound quality in it is amazingly good, and levels are low, so I set volume to 0dB or even up to +6db gain to get more juice! Currently I'm listening on RHA30. Tried Momentum, but didn't like it at all, on HD215 treble were missing. Next week I'll see how it sounds on AD, and off course I'll share. Here's the challenge - out of all your headphones, dacs and amp choose one such setup that you find rocks this video. So, what are your proposals?