Quality professional audio headphones, which transcribes so ruthless enough all the characteristics of the files that I listen to, especially on the net, with pure happiness when they are of good quality and with fear and pain when they are "stews". Very comfortable, with a low impedance that allows it to be used with any "player" modern genre Ipod or other, it is a very good choice, especially as I paid 95, which is an excellent price if you do a little tour of all the sites that sell. Of course, there are better, but it is more expensive, much more expensive. In addition, we can find all the spare parts to rebuild and avoid it to age too quickly if necessary. I had no problem with it for almost 3 years and I use it every day, it replaces very advantageously integrated speakers to my Imac, which are however not bad, but here we are clearly in above. It is not completely isolated from the outside world even though it is a closed helmet, which can be a problem if you use it in the studio for shooting sounds (risk of "repisse").