After my beloved Sony had MDR-62 headphones passed away, I searched the Internet for a similar design, lightweight HiFi headphones and found in a forum the recommendation for the PX 100 Sennheiser. I can this recommendation formally pass because the PX 100 is an incredibly practical, high-quality, open headphones. Among the positive aspects: It is extremely good for people who travel a lot and want while listening to music via MP3 player or notebook. You can fold it and easily stow; practical, included travel case leaves no wish unfulfilled. The sound is very neutral and supplies at low to medium volumes very open sound without emphasizing treble or bass. The PX 100 is very light, fit perfectly and does not result from pressure still you get to play loud and long hot ears. Rate negative I would distorting the short length of the cable (1 m) and a tendency at high volume in the bass range a little. All in all, corresponding to the PX 100 very well but my expectations.