Uniquely designed Neodymium magnetic circuit adopting the magnetic repulsion system with 1.5 tesla (15,000 gauss) magnetic flux density to achieve wider dynamic range Detachable unbalanced cable is made of 7N grade (99.99999%) OFC and highly durable duralumin plug case Proprietary "Biodyna" diaphragm for fine and high resolution sound reproduction Housings finished by Japanese traditional "Urushi" lacquer by a 110 years old artisan group on Japanese Cherry Birch Ear pads made of protein leather made from eggshell membrane for maximum comfort