Bought here more than 3 weeks, I find it very good in musical quality and insulation. Connected by wire on my musical keyboard, the sound has never been so good, even before my Koss Pro The helmet also connects very easily with my iPhone for a very good sound But the major problem is that the connection to my PC with Windows 7 Pro works very random. The pilot does not exist. So if your need is for your PC, do not hold back! Serre very slightly "large" heads