This quote is about the best I could find, from a seller:
"Sealed design Eng/film monitoring headphone w/coiled cable a 1/4" stereo phone plug. Flat frequency response excellent isolation from ambient noise 200ohm." (here)
Here's a pic:
Like I said, nothing to write home about in the looks department. However, being a studio monitor, and twice as expensive as any other studio monitor I'm aware of, it gets me wondering what's so darn special about it. Here's another place where they are mentioned, although you don't get much about em. Headroom sells em, although they haven't tested them out. And lastly, here's a .pdf of what beyer had to say about em.
Enlighten me folks....