I have just acquired this pair of headphones and I am a little disappointed as qu'habitué Sennheiser products. I expected better bass. Most music going well but when you listen very fed bass songs, one is disappointed. I had cheaper headphones of the brand that were better. However, the sound from the headphones is very good and pleasant. The headphones are very much in place thanks to their shape and dug settle better and more comfortably in the ear. The act of moving your head and lean over the sides does not move. I almost do not feel them on me really. I particularly appreciate the sound control from the small wheel that prevents the release the handheld device and show it to everyone. I recommend this product ... Except for people who listen to a lot of rock and other music with lots of bass. If you are looking for a combination discretion / effectiveness, I advise you to opt for premium headphones or small headsets.