I chose this helmet for the Shure brand and laudatory comments and tests I have seen on the internet. And I am not disappointed. Very good insulation, relatively comfortable headset (but do not necessarily fit all ears), very good definition of the sound (I find the sensations of my headphones ATH-M50 studio), very precise low but unfortunately too present and slight lack of clarity in the treble but it corrects itself well with a slight equalization. I Sennheiser headphones which cost 70 (all the same) and the difference in sound is bluffing. I bought it to use it with my smartphone and preparing me to have me make / buy an adapter with a finer jack to plug through the hull a little thick for my smartphone (Nexus 4 + shell Ringke Fusion) . Good surprise: the new models are slightly modified jack (see photo) to adapt to smartphones equipped with a shell or bumper. It's very well thought out. Had I known that, I would not have hesitated so long to buy it.
