Sennheiser HD 560S

These are super comfortable, I can wear them for 4 hours and not get uncomfortable. The volume level is nice and loud and perfectly sufficient but not too loud like some of my other headphones that give me headaches after a few minutes.

Honestly stop looking, these Headphones are perfect for listening and also perfect for mixing on. I bought them to listen to the mixes each week after gettin home from recording my debut Album. It's a good buzz to get home & listen to the evolving mixes cause these Headphones really allow me to hear the smallest of noises. The producers head is wrecked, he bought monitors worth thousands recently & these Headphones put them to shame cause there are many things elusive on his monitors but they are clear as day on these headphones, which is exactly what i need, to be able to hear noises that need to be deleted later.

If you don't like critical listening, don't but these, if you do then Just buy them :)

Music sounds beautiful on these :)

I have used HD 560S for 8 months now. I don’t care about built I care about sound.
These were my first Open Back studio headphones. Before I have used dt770 & ath m50x. I’m owner of Adam A7X & Yamaha HS5. I got these because I produce electronic music and I have read a lot about the benefits of Open Back compared to closed back which is really many steps ahead “at least for the experience”. I was between DT 990 & HD 560s. In my experience this headphone gives you a nice overall sound or listening experience. After so many months I can say:
The bass region is very problematic because starts rolling off too soon, which for electronic music is very important to listen it accurately. Maybe because I was used with closed back sound and the ath m50x for me have a 9/10 bass accuracy, hd560s made me struggle with mixing or getting an accurate bass, if you can’t hear it you try to push it more than necessary. After couple of months now I have a better idea of how bass should sound or be mixed with 560s and the lows should sound “thin” on them to be well balanced in a mix. In my opinion it’s better to listen certain regions in audio reproduction equipment more than it should rather than not at all. HD 560s made me make harsher high frequencies which still I believe in their Frequency Response they have some very big dips, as I said you better hear it rather than not at all which I mean -6 to -10 db dip. The most critical region for me is 4-12khz. If I get it right than everything will sound good below that.
Now what they Improved to my mixes.
The midrange feels well balanced. Midlow to midhigh has become more advanced in my mixes. Vocals, Instruments that go doen to around 100hz I have a better idea with Hd560s on how to make a fuller midrange.
Now I have to focus more on the stereo and mono. HD560s indeed sound very spacious and give a better imaging of elements. They sound big and I always try to balance big stereo with well balanced mono to stereo ratio.
With hd560s you get what you are paying.

Now I have to share this also. I have listen a couple of times to DT990 pro 80&250ohm. The DT990pro do not sound flatter than Hd560s, indeed they are harsher on the high frequencies, but they are tuned different and feel like have elevated frequencies rather than dips. Bass - you can mix more accurately.
Mid - same as hd560s
Highs - Elevated, ugly to listen to, good to mix to (prone to dull mixes if not monitored).
HD560s sound beautiful but for me as music producer which mixes & masters by myself maybe I need some “ugliness” to well balance with the rest.
I will not sell HD560s as I said they are a beautiful equipment. Paired with good studio monitors you will be fine.
Will I buy DT 990 Pro? For mixing only.

Disclaimer: I've only had a few hours with these and am not a producer.

I use these headphones at home, powered by an iFi Zen Can, feeding it FLAC from my PC through a Digitech RP155 as a DAC. My favourite two hobbies at home are critical listening and video games, so that's my use for them. I also have Audio-Technica ATH-AD500X and a pair of IEMs.

Pros: very clear sound - they definitely give the impression of letting you hear everything in the music - to me they don't seem sibilant but they will cause listening fatigue at very high volumes quickly. I am very happy with the tuning of these cans - very revealing but not tiring and fun if you appreciate intricacies in sound.

Cons: build quality. Casing resonance from low frequencies at high volumes can be very obvious. This might be fixed eventually or never by Sennheiser.

Conclusion: I genuinely enjoy listening with these, the benefits to me outweigh the drawbacks and I consider these a legitimate upgrade to what I had before.

Use:
Mainly at home for music and gaming.

Pros:
Much lighter than my previous headphones (Philips X2's), Imaging is amazing and even more precise. You are easily able to point where anything is coming from whether it is listening to music or gaming. QuIte easily driven using a G5 currently and doesn't have any issues on low gain.

Cons:
The only major issue is it isn't as comfy as people lead others to believe, compared to my X2's they are quite harsh on the clamping force and the ear cups aren't the thickest and can sometimes if not placed correctly rub on your ears. Some people with bigger ears might want to replace the ear cups which I might do in the near future if they don't break-in. My only other gripe is the cable its a bit long and might also want to be replaced with something higher quality and less bulky.

Excellent, neutral sound, with plenty of volume when connected to my Yamaha P-525 piano (no headphone amp required). Key to this - I discovered - is not just impedance but more importantly the sensitivity... a lower sensitivity rating means they need more power to drive them. I tested both the AKG K-702 and Beyerdynamic DT-990 Pro 80 Ohm, and they were woefully lacking in volume on my P-525, but these have the double advantage of higher impedance (generally giving better detail), and relatively high sensitivity, so they need only a fraction of the power of the others to produce sufficient volume. The shells comfortably surround my ears and the velour pads allow for hours of comfortable use.