Pros: Excellent sound in all genres, very comfortable even with glasses, very efficient (no need for amp), build quality, foldable with hardcase
Cons: Slippery headband (not suitable for other active use than walking), isolation is a little below average (leakage is low though)
For a long time I've been looking for a foldable closed headphones that sounds fantastic and is easy to carry around for my travels.
The KEF M500 has everything I need. First of all, it sounds great in all genres. I've tried pop, rock, classic, jazz, heavy metal, opera, and it handles everything well. The sound is much more open and natural than other closed headphones I have tested, it's quite neutral with a little tilt up in the upper bass and a little down in the upper treble, just enough to make it sound bigger than it is, and avoid any harshness of any kinds in the treble. There's a great "room feel" in the sound, to make it sound like floorstanding speakers, they almost rival my PSB Synchrony Two in sound quality.
Here's a list of closed headphones (not all foldable) I've had or heard in my search before purchasing the KEF M500:
Beyerdynamic DT770 (32/80 Ohm)
Focal Spirit One
Martin Logan Mikros 90
My old reference are the Denon AH-D2000, which I own for a couple of years. The KEF M500 are first of all much more smooth than the Denons. Songs that have a tendency to sound harsh in the treble are smooth in the KEF M500. The bass which is one of the strong points in the Denons, is no match to the much faster and precise bass of the KEF M500, the Denons bass sounds boomy in comparison.
The KEF M500 are not perfect, but they are the closest thing to perfect in my ears I have heard so far. Combining that with excellent comfort and a nice small foldable design (including case) with excellent build quality, the search is over...
PS: An iPod Touch fit in the case together with the headphones + cables.
Any questions, just ask below: