There was great anticipation as the Sennheiser RS 170 arrived here. What I did not everything in the reviews read about how outstanding the sound quality is when she runs because she is really good times but can not find an equally good with the quality of an equally expensive wired counterparts. First first times the unit has been charged for about 2-3 hours is no longer lit, the charging LED and then off we went the first Test.Aufgesetzt and he is really incredibly comfortable fit incredibly well and really flatters the head, the pressure is not too high when he sits too hot and also Wurd not me so. 7.1 connected via the 6.3mm connector of my Auzentech Bravura and no noise everything quietly really nice so must sound a wireless headset if anything plays. But then when I played the first test song I heard already a fairly high pfiepen from the speakers come and this was also confirmed quieter with every quieter / part of the various. Songs which I had alluded (Rock, Metal, Hip & Hop and classical genre ever different. Songs for testing via iTunes). This Pfiepen was such Penetrant when another hearing I could even hear during loud parts already. In itself provided once the Pfiepen is drowned, the sound is very beautiful very clear, so really to listen very nice not very crisp clear highs plated bass. Then I tested a movie (Inception) and lo and behold here was also very annoying this Pfiepen a constant companion throughout the film. But what an absolute no-go for me. is that the headphones are not speaking during or no noise in the foreground are simply off, and not just in this film also he does with all other movies which I have gestest. Once a sound is not a priority to turn off the headset and is no sound on its own, the same he is doing well at the Playstation 3 and the Xbox 360, so there is some one in front as if you were watching a silent movie. Really more than miserable and disappointing. All in all ists but unfortunately shot in the oven. The constant high Pfiepen and this strange shutdown behavior really are a no-go for a handset of such price range that I would rather stay in the wired. Two stars there for good work and exact shape.