I have the Sennheiser CX300 and wanted to try for wear new. With this I was always very happy, so I put back on the brand Sennheiser. But this time I was disappointed because the heights were totally excessive. This is called Sennheiser then "Precision", as it probably is to convey the impression of clarity. For me, this vote is but unbearable. The S-sounds hiss so much that I could hardly fix it with an equalizer on the PC. But since I mostly use the headphones in portable devices, the pre-defined EQ could not do much. The bass and midrange were very well reproduced, but that is not enough. In a nutshell, the half as expensive Philips SHE9000 have ordered and am very satisfied. Here I need garkeinen Equalizer, tuned more nor too low. But this fits übberraschend good go. The Sennheiser I bought at the store, it should therefore have been originals be (no rubber smell). If you like "precision" in the heights, the love like Sennheiser, I would not recommend though. In my opinion, they are also over-priced in terms of processing.