Fostex USA 25-Ohms TH900 Premium Stereo Headphones with Japanese Lacquer Earcups and 1.5 Tesla Magnetic Circuit Neodymium magnetic circuit with a 15,000 gauss magnetic flux density for wider dynamic range Soft, comfortable ear pads Housings made from Japanese Cherry Birch and finished with Urushi lacquer 25-ohm impedance 2-inch dynamic drivers