Originally Posted by pbarach
I didn't like the Senn 600 or 650. Both of them sounded dark and muddy with the headphone amp I had (Headroom MicroAmp). They also squeezed my TMJ area and were quite uncomfortable. Sold them both, got AKG K702. Tight bass, more midrange detail, smooth highs, not fatiguing to wear (but some people dislike the bumps on the underside of the headband).
I like them even better with the Burson HA-160 amp I got recently.
That's interesting. I agree the HD650 sounds dark (treble recessed) to me too. I've listened to them through a number of different amps (Burson HA-160, Bottlehead Crack, WA6, Peachtree Nova, Schiit Asgard, and Nuforce Icon HD) and couldn't get the treble to come out enough for me.
I have also listened to the 702 through a Burson HA-160 and thought it sounded too bright and sibilant. I really love the HD600 though. It sounds to me like the 650 with "the veil" removed - smooth and refined, with good (but not too much) detail and a neutral freq curve. I can't imagine anyone thinking it sounds dark.
Although I am very happy with my HD600's and could be satisfied by them for the rest of my life, I want to re-visit the orthos (LCD-2, HE500, Thunderpants) now that I have more headphone listening experience under my belt. I think the orthos might have more of what I'm looking for sound-wise, but I need to spend some quality time with them to be sure.
It just goes to show how differently we all hear and how personal this hobby is!