What can I say about this headphone that hasn't been said? I just know that all the stupid things about it - the cable with stupid resistance, the non-replaceable pads, the strange headband, the fact that they probably aren't making it any more - all of those things just fade away when you put them on.
 
They're accurate. Sure, not totally accurate - not like my K550s or HD598s - but an accurate that adds enough excitement to make good music fun. Isn't that what this is all about? I had Mad Dogs for a while, and have nothing but love and respect for those little monsters, but these have all the good parts of the Mad Dog with almost none of the bad. More soundstage. Airy-er treble. Just awesome.
 
It boils down to this - you can get an HD600 or an HD800 or an AKG K701 and sit and be very proud of your lack of distortion and your oh-so-accurate sound, and I'll respect and like you for that. That's a fine a noble aim. But this headphone makes me smile. It makes me bob in my seat and dance along and act like a moron. Plus, if I DO want to hear every little detail, I just listen for them, and I can. They have the musicality of my old Momentums, some of the accuracy of the K550 and DT1350, some of the space of the HD598, and a beauty all their own.
 
Sorry, but I can't make it more clear than that. Just go buy the things before they don't make 'em anymore.

I've searched for a long time now for a pair of phones that do it all. These do. They have tank-like build with little complexity, and the sound is amazing. Big soundstage with accurate placement.
 
For acoustic tracks, this headphone absolutely nails it. Like being there. The electronic tracks sound amazing as well - tight, controlled bass, rich mids, and detailed highs WITHOUT sibilance, something  to which I'm very sensitive. The Beatles sound rich and full, and I can hear every breath and sniff.
 
I can't find a thing wrong with them. Take the comfort of the K550s, the detail of Beyerdynamic DT1350s, the musicality of Momentums, and the fun factor of Grados. Then add awesome bass.

Oh my. If this is how beyerdynamics builds their stuff, then I WANT MORE.
 
These are the perfect complimentary 'phone to my Sennheiser Momentums. Both are built like tanks, but the sound qualities are so different. Where the Momentum is warm and forgiving, the DT1350 is cold and analytical. Where the Momentums are mid-centric, these are flat. Where the Momentums have character (good character), these are robots.
 
This is the best analogy: the Momentum is Kirk, and the DT1350 is Spock.
 
I am a scientist, and love quantitative data to back up claims, but the frequency response curves for this headphone does not tell the whole story. I can tell you, as a former recording musician and possessor of a very sensitive ear, that these are as accurate as 'phones get in the under-$1,000 category. The sub-bass is strong and punchy, but not overdone. Bass is strong and present, but, again, not overdone. Mids are not recessed, but not overdone; very smooth. Treble: what a revelation! You can have treble, and plenty of it, but it doesn't have to be sibilant and piercing! Amazing! I was startled several times when I heard Paul McCartney breathing whilst singing on "She's Leaving Home". I really thought my wife was trying to talk to me - because I can't hear a darn thing with these on.
 
I didn't like the AKG K550 because it was too piercing, but I loved the accuracy. This is like the K550, minus the extreme pickiness of placement (although take your time with these) and fizzy highs. If you need a headphone that makes everything sound good, get the Momentum - it's seriously amazing. If you need a headphone that makes everything sound exactly as it was meant to sound, get this - it's seriously amazing!

This headphone is simply amazing.
 
I'm new to these forums, and new to purchasing my own awesome cans (have had Bose OE, V-Moda Crossfade, Klipsch Custom 1 IEM, Sennheiser HD280, Grado SR-80i, and more). I've used other people's great gear - HD800s, Stax something-or-others, and tube amps galore - for a long time as a professional musician. Now I'm a teacher and looking for a good, accurate, comfy set of cans I can use with my MacBook air and Fiio E17. I listen to a very eclectic mix of music - classic rock, modern pop and R&B, blues, jazz, classical, but mostly old soul and rock from the '60s.
 
I had purchased a pair of AKG K550's at the urging of some more knowledgable head-fiers. They were great in terms of SQ - detailed, HUGE stage for a closed headphone, well balanced for the most part. However, two things nixed them for me: the really piercing treble that sounded plastic-y, almost digital, and the total pickiness about fit. If they were just a mm off, you were screwed. Glasses? Forget it. Not comforting to come home to.
 
Looking at reviews, I decided to spring for a "Like-New" used pair of Momentums from Amazon, at a relatively low price - $280. Sure enough, they were like new - never registered, in the box with the chords not even opened or unwrapped.
 
And then I listened to them, and found Nirvana. (Not the band, thank goodness. Not my favorite, but I respect them.)
 
Big bass in comparison to the K550's, but not overwhelming. Not exactly reference headphones, but not that far off. A reference-y "fun" headphone, more like. I can hear just as many details as I did with the K550's, but just have to pay a little more attention. The details are served to me as an option, not shoved in my face on a pitchfork. Voices sound more natural - John Lennon doesn't sound as thin anymore. No veil that I can hear, just more relaxed. And there isn't a type of music that baffles it.
 
Enough has been written about the build quality. Suffice it to say that they are built like TANKS. I never see these failing.
 
If you need a fun 'phone that can also serve as a close-listening companion, these are the cans.