HiFiMan HE1000 Open-Back Planar Magnetic Headphones Worlds First Diaphragm in Nanometer Thickness "sounded remarkable and may motivate me to do a lot more headphone listening" -Jim HannonThe Absolute Sound Advanced Asymmetrical Magnetic Circuit offering perfect reproduction of live music Ergonomic and comfortable design fit for most people, with greater reliability and durability. Patented Window Shade System reduces sound reflection to gain wider sound stage