Originally posted by: alfa147x
i want a pair, anyone ever buy used headphones?
Nothing but.
What it sounds like they've built is a coaxial transducer with a ring-radiator tweeter. Most headphones just go kaput above 10khz - this one should have no problem.
The ring radiator is an interesting idea - if I'm not mistaken, the lowest frequency they can produce is not quite so closely tied to the size of the transducer as it is in many of the planar designs, which means that you can get the treble extension of an electrostatic transducer without the annoying excursion limitations.
If you look outside of headphones, ring-radiators are nothing new. Tymphany introduced the first - the Vifa XT25 - a good five or six years ago, with even better ScanSpeak ring radiators following shortly. These are some of the best tweeters money can buy, bar none. Hi-Vi even makes a triaxial speaker called the "trinity" with a a cone midrange around a ring-radiator tweeter around a planar supertweeter, though it's not considered to be particularly good in terms of sound quality or value (which is not surprising considering that hi-vi has made no prior ring radiators).
That said, I don't really like headphones that much, and the current set of speakers I'm (slowly) bodging together should be much, much better, if only because I don't have the same design limitations - for example, I can use concrete and split output between three drivers, and they can't.
It's a shame, though, that there's so little innovation in the headphone market. Beyerdynamic, for example, has been selling pretty much the same lineup of headphones with minimal changes for years and years. While there are many small companies offering a wide variety of unusual headphones, these are usually botique items sold in small volumes at high prices, and build quality is often poor.
Hopefully, Logitech (which owns Ultimate Ears) will pump some money into a novel full-size headphone design as well. I'd quite like to see a new air-motion-transformer based headphone, preferably priced below $300 so I can actually afford it.