By the time I ordered this headset, I hesitated between the Bose QC15 and audio technica ANC9. And frankly I have no regrets, this headset is a marvel. First, the gear noise is perhaps not as good as his counterpart at bose, but enough for me. When empty, it was a very good isolation from the outside world, but then when you put music this is where it gets interesting, even at low volume we are completely "cut" from the outside, the three modes reducers sounds really work wonderfully as we had announced when using them to the appropriate location (blue) transport (red) loud, (green) dead calm. Second, is the comfort provided by this helmet, I wear it every day, on the road when I go to work, and at home when I was playing Rocksmith. I wear it for hours, honestly I almost forget the presence of headphones on my ears. Third and last, the sound quality. Being a listener lot of music all day long, I got a different type of earphones and headphones: standard, in-ear headphones, circum aural, iPhone headphones ... I really appreciate the sound that gives me that helmet, I was afraid on this point by reading the comments of other people who bought this helmet. "It lacks bass?" Uh no, I listen to a lot of really kind of music, say any kind, except classical, rap and I listen very little ... Well I find that the bass is reasonable for any type of music in short, it does not spoil the listening, on the contrary. As the rendering is very rich, really means all the details of a music that I hear not listening on my speakers or my headphones iPhone! The highs are not aggressive, far from it. It is a new music experience to my taste. Conclusion: audio technica is the almost perfect balance of noise reduction and keeps a very good sound reproduction, which is not the case of the QC15, which I do not denigrate the great work of "quiet comfort" but the sound reproduction is not seduced me. So I turned to the Japanese manufacturer. If you want good headphones combine has both noise reduction and sound rendering, please take the audio technica ANC9, for those looking primarily for noise reduction, turn to the German manufacturer.
