Since I have had them for a while, I can say that they are a real pleasure, every day, every week, every month. I just don't get tired of them. I can use words like balanced, neutral, spacious, detailed, but those really don't distinguish them enough. They are all of that, but they are totally non-fatiguing. I can listen to them for hours on end, and still want to hear more.

I am driving them with the Blue Hawaii Special Edition, which only adds to the delicious experience of these headphones. When I listen to well recorded and mastered DSD files, it almost takes my breath away. That eerie feeling that the instruments and voice are right in the room with me is uncanny.

I am a very happy head-fier. I don't even mind that I paid a premium for these headphones as an early adopter.

Purchased new from Definitive Audio in Seattle.  Have been through many cans since then, but have kept the DT-911s for listening to Television after my wife has gone to bed.  The are so comfortable that I forget that I am wearing them.  Great for TV audio, but not up to my other headphones for music.

Well, I have tried all of the great headphones over the last few years (Stax, Sennheiser, Grado, AKG, Audeze, Beyer Dynamic, etc.) and I have returned to my all-time favorite K1000s with Stefan Audio Arts Equinox cabling - driven by a Macintosh C2200 tube preamplifier and a First Watt F1 amplifier.   What brings me back is the incredible soundstage, the imaging and the transparency of the sound.   I no longer listen to the system - I listen to the music.    What more could I ask.  I am re-listening to my entire music collection with such appreciation for the incredible performances.    I am really happy with the K1000s in this configuration.  Of course I will keep listening to other offerings (it is a hobby after all), but it will take a lot for me to switch from these great "earspeakers".