I hesitated between different helmets reduce its Christmas between the bose, Dr. Dre, the ATH ANC7b, sony etc ... The problem with all this is that you can try, or the FNAC only not are testing 50 helmets. So I decided to take the Koss, Sony seemed not so according to some opinion, the Bose 350th a little hard, Dr. Dre seems like a ripoff, the ATH makes some bass that I saw ... Now, I already was preparing a Koss porta pro headphones in my old and I was very satisfied. So this helmet? A little big, but largely mobile, materials seems very good, a bag for transport (although I do not really see utility) and that's it. Yes Koss does not even offer the batteries I think it's a bit shameful for a helmet over 200e. The headset works as well as inactive to active mode, ie you can use it without putting noise reduction, which is very useful because in silence not need. The helmet itself very well isolated from outside noise, it is impressive, the pad includes all of your ear so that you are fully in your world. Once the active mode, the low frequency noise will just disappear, I could realize it in a car on the highway, the engine noise disappears. As for the sound, very "Basseux" This is exactly what I needed, I listen to a lot of electronic music and headphones fills my expectations, I even recommend putting no modifier sound on iphone , ipod etc .. For it may be that these are too low. If you put the headphones in active mode, there will be a change in sound quality, this will vary depending on the pieces, sometimes it will be better in active mode and other times the opposite, totally random, but in all cases this remains a very good sound. An important drawback that I tended to neglect before buying because I had read, the battery compartment, hidden behind a cushion, access is really not easy and I think this could lead to gun down the cushion quickly. Otherwise I recommend this helmet for those who love the bass, and do not want to put no more than 300 in a noise canceling headset.
