I just got a pair of these. I powered these out of a chromecast feed to my speaker amplifier (Denon v477).
And I have to say in general I'm disappointed. Not because of these headphones per se, but because I think I'm expecting more out of a headphone than what they may be able to deliver. The problem being listening fatigue.
In the past I've had the Hifiman HE-400, and while they were a great headphone, and everything resolved, the headphone was way too bright and I was never ever able to listen to a full album in its entirety. Since then I've bought various quad-driver earbuds, which work well but don't have the soundstage or fullness of sound that a full size headphone has. I've also bought a Phillips Fidelio L1, which is a warm, dark headphone that is not fatiguing, but lacks detail resolution and clarity.
I have very modest floorstanding tower speakers from Pioneer - bought for $120 - but the detail resolution and bass on those is excellent. You can hear everything in the music, and not at all be fatigued by brightness.
To date I have failed to achieve this same kind of sound in a headphone. I was hoping the HE-500 would address this fault of the HE-400, giving me details in a headphone that wasn't excessively bright. It did not - and it still has the tizziness on vocals, hi-hats, and high-frequency sounds. At this point I'm going to move onto the Audeze LCD-2 with the hope that headphone might be the one I can listen to for hours at a time and hear everything in the music.