I've had the H2s on for a couple hours now, and I've begun to do some reflection. I've grown more used to their sonic signature, and uh, somewhat peculiar fit. Truth be told, they aren't that uncomfortable. I'm not going to forget the two metal loops on the top of my head any time soon. I have large and oddly-shaped ears, and the grilles press into them. The HD-650s feel like featherweights in comparison, and the 590s are all but undetectable. That said, I find the H2s less painful to wear than any Grado I've ever tried (except maybe the GS1Ks.) They are a pain in the ass to take on and put off.
Again, I offer the caveat that I had to shoehorn the TakeTs into my rig, the signal path is Adcom GCD-750 -[Kimber KC-1s]-> Gilmore Lite -[Monster DJ RCA-to-1/4"s]-> Hafler -[Generic 10GA OFC]-> TR2/H2. This is a ...suboptimal setup at best. Also, none of this gear, save the Adcom and the Hafler, is remotely burned in. There are too many unknown quantities (and half-assed kludges) for me to properly evaluate the H2s. Bearing this in mind, I do have a few thoughts on how they sound. There is still something not right in the midrange. Instrument separation is lacking. This problem descends into the upper midbass a bit as well. I've been listening to Air's Moon Safari, and on "La Femme d'Argent" the bassline is massive, but lacking clarity. Conversely, the Minimoog at the end of "All I Need" sounds fan-freakin' tastic. My source does an exceptional job at expressing sonic texture, and the H2s pick right up on that. I listened to this album last night with my GLite/650s, for the first time in years (since before I had a headphone rig of any worth) and I forgot how much I liked it. Tonight I am comparing that session with the TakeTs. I am noticing different (I'm not sure I'd say more) details. In "Talisman" the Minimoog is clearly going through a phase effect, giving it an almost vocoder like warble. I never picked up on that before.
The H2s do somethings really well (gritty analog synth bass, snare drums, hi-hats) and completely fail at other tasks. Most of their successes are in the (deep) bass and high end, and most of their flaws are in the midrange. I don't want to give the wrong impression on the H2's high end. It is definitely upfront and intense, but it's not overly shrill or painful. Cymbals and snares are just right there. I hesitate to offer much conjecture, but I think they will scale well with better gear upstream. They are not exactly neutral cans, but they are certainly Ming the Mericless when it comes to revealing flaws in recordings/sources/amps/cables/one's wallpaper/etc. I am not in love with these things, but I continued to be intrigued.