The sound drivers are good sized (10mm) giving very good low end sound; these are not skull thumpers but do very well. but your recording may include sounds that you will swear werent there. Spero come sempre di essere stato utile. Upon disassembly, I found these bearings had a small amount of wobble between the center roller and the bearing-outer race assembly. Added an assembly movie to YouTube to show you how easy it is but cant link to it! It clamps down and covers my volume button, often holding it down so the volume goes down to mute. I have just tested this product on a 13 hour flight to the Far East and bought it so that I could use by Bose Noise Cancelling Bluetooth Headphones with the inflight entertainment system. mais de très belle qualité. They look almost identical, but they are slightly different so that if you put an L1 on the right earbud (or an R1 on the left side), it doesnt fit exactly right and it is liable to come off more easily. All I had to do was turn the slip resistant tag into the DM assistant.