Sennheiser HD515 Dynamic Stereo Sound Audiophile 500 Series Headphones (Discontinued by Manufacturer) Open-Aire, circumaural, dynamic, stereo headphones Eargonomic Acoustic Refinement (EAR) enables ideal sound channelling for a new kind of listening experience Stats of the Art Duolfol diaphragms Highly optimized, field-strengthened neodymium ferrous magnet systems Outstanding comfort for long listening sessions