I call recently the Audio Technica ATH-M20x my own. But as I also ATH-M50 own (as a top model), I can give a true subjective, but comparative review of the quality of these headphones. For the price of 50 can not go wrong with these headphones Nothing. Audio Technica has scheduled the "red pencil" at just the right spot. So these headphones do not have a detachable cable, it is this long (3m) and is very high. Also you can tell if you have the headphones on and the cables hardly draws a disturbing noise. Also missing included a carrying case, as it is in the ATH-M50, but that does not bother me personally, because I have never really used it. In addition, (the only real point of criticism), the headphones are not folded. Therefore they take noticeably more space, as would be. But that's about it "negative" to the. Sonically convince the M20x to its full length. Rich bass and crisp, clear highs. A surround sound, even if not extremely clear, yet noticeable. The impedance is fine. This could be lower. Because the headphones go on smartphone (Nexus 4) not as loud as I want it to me. But operated via a laptop or desktop or an amplifier, the volume completely convinced. For convenience, we can say briefly: TOP! You sit (for me at least) more comfortable than the M50, as they have a much softer upholstery. (Did the way the new m50x). Overall, one can only say, if you expect the best headphones for 50, it will not receive course. Because, although the M20x are great, they are not nearly as good as the ATH-M50 for you but costs only one-third. So for the normal "consumers" would these MMN completely sufficient. The ATH-M20x offer an attractive design and convince the "Value for money" across the board level. Strong buy recommendation and (just as it did on the Audio-Technica website advertised), "The perfect introduction to the critically acclaimed M series".