Not long ago I tried another 560 with a short cable, it seemed that the sound differed less in the top and more dirt in the middle. The pressure is also strong, but a little weaker. I also returned it because of the pressure (
I've got a relatively large head, and find things like the Audio Technica ATM-M series intolerable to wear for any length of time. However, I actually find the 560 really nice to wear for long periods.
I brought my pair of HD560S a couple of weeks ago, on the basis of strong internet reviews and a good listen to a demo pair. However, on getting them home, I've found them to dull/muddy to listen to without an EQ treble boost. I wonder if the demo pair I liked was the previous version ? Quite disappointed considering the internet love for them.
I subsequently brought a pair of Hifiman Sundara closed backs as I also wanted a pair of closed backs, and they're fairly cheap at the moment. I've gotta say, I prefer the Sundara closed backs in almost every respect.
Maybe I have weird hearing as most people seem to love the HD560S and dislike the Sundara closed backs?!