I think he's talking about his Beats by Dre
.
Anyway, I am warming up a lot to the HD650s. I'm at maybe 25-30 hours of burn-in, and the sound has improved by LEAPS AND BOUNDS. The bass has tightened up so much, it is outrageous. The treble lost almost all its metallicness and harshness, and the lows now exist (whereas they were just oddly absent before).
I think my two largest qualms are the whooshier nature of the bass and the slowness of the treble. But that's part of the laid-back character of the phones, from what I hear. There's not much I can do to fix that. I'm looking into the SAA Equinox cable, but I am skeptical of cables (I don't know if it's all just marketing bogus). The guys on Headfonia seem certain that there is a difference between cables. There is such mixed opinion about.
Overall, though, they are fairly pleasant to listen to. I get why they're non-fatiguing and relaxed. They really do sound "gentle": whooshy bass and slower treble would do that.
Another 20 hours, and I'll see how I feel about it. And then maybe there will be some final settling in at around 100hrs. Before, I was going to rate the HD650s at a 2/5, but now I ca certainly see why they aren't deserving of such a bad score. Maybe not my perfect sound signature match, but now I'm not baffled as to why people might like them at all!
P.S. They kind of remind me of the Sony MDR EX-1000, which were also slow and gentle.