Their reputation precedes them. If you know, you know. Mastering grade open back planar magnetic headphones, I have used them for production and mixing extensively and they truly are a joy to work on. Extremely solid, comfortable, incredibly precise, detailed, beautiful soundstage and I could go on. They work great with a dedicated amp or audio interface, that s the optimal setting but surprisingly enough a MacBook can drive them to a comfortable level. Making them not studio-dependent which is great if you move around a lot. I m selling them because I bought a pair Barefoot MM27 this year and I found myself relying less and less on headphones in general. They are in perfect condition, had them for just over a year and they come with the box I received them in as well as the dual mini XLR to 1/4 TRS cable.