The ULTRASONE 15 series is the first open reference headphone with patented S-LogicEX® technology. The Edition 15 draws its breathtaking sound from a completely newly developed driver system: the Gold Titanium Compound Technology GTC. The membrane consists of a gold foil and a titanium tweeter dome, which together ensure an outstandingly transparent sound with enormous attention to detail. The uniquely fine sound of the Edition 15 benefits both private music listening and work in the mastering studio. The patented S-LogicEX® technology ensures perfect spatial imaging - all instruments are acoustically reproduced with exceptional clarity and precision in width and depth. In order to do justice to the sound quality both visually and haptically, only the finest materials are used for the Edition 15. The capsule housings are made of American cherry wood, which is also used in instrument making. The high-quality stainless steel cover is elaborately crafted and underlines the high-end claim of the Edition 15. The individual characteristics of the wood grain make each example of the Edition 15 a truly unique piece with a serial number.