A helmet of an extraordinary noise reduction compared several brands purchased and old models. By air, the reactors allow a slight shuintement. For purists, imperceptible presence of a very slight hiss in active mode without music and without external noise, but that is not its purpose. Unlike the Bose headsets and some brand systems, the curve is fairly neutral, which satisfies me completely by using a drive with 10-band equalizer. Regulars strong bass may be disappointed, without reaching the high quality of my helmet Seinnheiser living range, all sound is clear enough without metal consonance, the mids are not forgotten. Listen on Jazz, Classical and Pop. Congratulations to operation with low battery, the sound is a little muffled to the active mode, but very acceptable for transport. This amortized helmet perfectly the atmosphere of the waiting rooms. The impedance is adatée my smartphone, it is not overly useful to mount the volume. It is a closed helmet, it can get a little warm in the long but very comfortable pads do forget, noted two internal microphones in addition to external microphones for active correction and speaker pavilion headed back on ear. No sound cuts through automation cf. certain other assets helmets competitors.
