Pros: Good technical ability, somewhat flat response, long cable, good build, highly customizeable, etc.
Cons: Upper mids are too emphasized, hints of sibilance, bass roll off, need eq, EDIT: unnatural sound, better options at the price point
I'm a consumer, a headphone enthusiast, so I'm not using these for professional use.
... that's it
They come in a nice box, really giving them a professional feel. The bag I think is nice, since it feels durable, but it is made of synthetic leather so deon't expect something heavy duty. In the box, Sony gives you the headphones, a 3.5mm to 6.3mm screw on adapter, a bag, and a year warranty. When you actually take them out of the box, you'll soon realize that that 1 year warranty is useless.
In a word, the build is simply great. I wish I could tell you more but there isn't much to tell to be honest. Build shouldn't be one of your worries regarding this headphone.
Comfort wise, I would say they are uncomfortable.... until you replace the pads with these:
Now they're my most comfortable cans in my selection, only surpassed by the Sony MDR MA900.
As for sound, these sound very detailed and analytical, but if you're coming from something with a warmer signature like the MDR XB500, you'll definitely notice the emphasis in the upper mids (from around 2khz-12khz).You can obviously see the boost here: from Golden Ears
Not only did Sony decide to emphasize the upper mids-treble, but they decided to recess the lower mids. That's simply a recipe for... badness (lol). I'm exaggeration the flaws a bit.
There's some slight bass and treble roll off, though they shouldn't be the main concern.
Anyway, some may be wondering what effect the coloration would have on the sound. Basically, it makes the vocals sound tinny, like they're coming out of a cellphone. Obvious exageration though. It also can make some instruments sound a littl;e strained/strident. Unnatural is a good word, as is analytical.
So, why have I given them such a good review? Well, that's because of E to the Q (tried to it rhyme). Equalization (aka E to the Q) is fairly easy, for this headphone at least. When you EQ, you're trying to force the headphone to have a flat frequency response. So, in order to make these sound flat, or natural, you must counter the response:
Use an EQ, (example, EQu on IOS, or Poweramp on Android) and follow that bolded blue curve. Add some flavor to it to make it sound more pleasing.
Sound Impressions (EQ'd, with the soft pads which slightly increase the bass)
Bass is tight, mids are right, highs are bright, distortion -3000° Fahrenheit (I can do this all day!), soundstage out of sight. These bcome the perfect cans. Well, on bad recordings, the sibilance does start to act up, but who cares! (lol, I know some of you care, but you's better find some better recordings or these head-fi'ers will eat you alive!).
If you want to know why these react so well to equalization, well my best guess is because of the technical ability of these things. Studio monitors like the MDR 7506 are usually good at EQ.
MDR 7506 vs UE6000 vs M50
UE6000 un EQ'd sounds the best, but they don't react the best to EQ. They have the tightest and deepest bass, and have the best isolation.
The M50 is nicely balanced and doesn't really need EQ but you can if you want. The frequencies that are particularly difficult to EQ are the Mid frequncies (less so with the upper mids) and that is where the M50 lacks. The M50 also has a smaller soundstage and is much heavier.
The 7506 is the most engaging of these, and have outlasted the rest in terms of build.
Overall, a 3.5/5 from me.
(EDIT: January 2014) It is beaten by the UE6000, ES FC300, Martin Logan Mikros 90