Audio-Technica ATH-M50xMG Limited Edition Professional Studio Monitor Headphones Proprietary 45 mm large-aperture drivers with rare earth magnets and copper-clad aluminum wire voice coils Exceptional clarity throughout an extended frequency range, with deep, accurate bass response Circumaural design contours around the ears for excellent sound isolation in loud environments 90 degree swiveling ear cups for easy, one-ear monitoring Professional-grade ear pad and headband material delivers more durability and comfort