some evolution

However, unlike other headphones manufacturer, including system circumaural, mobility is restricted by the nature of the system "chin": When you move, the mechanical pressure on the ear canal is in the long, painful. Moreover, this pain may also manifest itself in a static listening after 30 minutes.

Another drawback is the position of the volume control knob In some head movement by friction of the base of the helmet with your clothes, the volume may increase or decrease in an unpleasant way.