Audio-Technica ATH-M50xBL Professional Studio Monitor Headphones Critically acclaimed sonic performance praised by top audio engineers and pro audio reviewers 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 swiveling earcups for easy, one-ear monitoring, professional-grade earpad and headband material delivers more durability and comfort. Detachable cable