Summary: I have owned the Koss UR20 DJ Headphones for a little more than a month. For the money, these headphones are pretty good, but if money doesn't matter, these headphones are not too great. If you don't have a lot to spend, these are one of the better headphones you can buy in the $20-$30 range.
Summary: I needed a new pair of headphones for electronic music production which is what is displayed and mentioned on the packaging. I use them with my MacBook Pro, software, synths and Pro audio gear. Very accurate audio reproduction with excellent bass response. Great Job Koss.
Excerpt: Headphones were purchased for use at a public library. Our patrons have commented on how comfortable they are, and there is no sound bleed when they are in use. Various patrons can sit next to each other, listening at a volume comfortable for them and not have their neighbors complain of too much...
Summary: I'm a professional jazz DJ (radio) and have worn various headphones for decades. Sony studio monitors are what we use in the studio. At home I have Audio Technicas. 7 years ago I bought 4 pairs of these and donated 3 to our local low power radio station. I kept a pair and have always enjoyed them.
Summary: Sturdy construction,amazing frequency response (30 Hz.-20 KHz.),very comfortable design.Works so well with Dolby Digital Plus on Windows 8.1...Maybe you should consider introducing a high-quality microphone for sampling and mixing.
Pros: Very reliable,deep bass and crisp treble,97dB.,comfortable leather cushion
Cons: best if suited with longer cord and gold -plated jack
Summary: These are, by far, the best phones I have ever used. I drive them with an Android tablet. I switched from Beyerdynamics Dt-990 (600 Ohmss). These have excellent treble and bass response. I suspect that they are not flat in response. That is terrific, because human hearing is anything but flat.
Summary: I use these for PC gaming more than music or stereo.
Pros: The ear pads are large and soft, sound quality is fine, cord is long and thick, seems to cancel noise better than my other headsets.
Cons: Ears sweat a little after about 30-60 minutes of use (which is why I removed an egg), you have to re-adjust the size every time you use them since it falls back to it's smallest position quite easily.