Sound quality: perfect (I'm not professional, but I love good sound). This helmet isolates great. He does not mind-blowing through the intermediate bow, and is not in direct contact with the great oreilles.Donc. Only small problem: after a while, I have to take a break because the pressure on the jaws is relatively painful. The question is whether it is the shape of my face that produces it or not. If I have the opportunity to do another test, I will confirm or refute this impression. Apart from that, that the musical bliss!
