Proprietary 45 millimeter large aperture drivers with rare earth magnets and copper clad aluminum wire voice coilsExceptional clarity throughout an extended frequency range, with deep, accurate bass responseCircumaural design contours around the ears for excellent sound isolation in loud environments90 degree swiveling earcups for easy, one ear monitoring, and professional grade earpad and headband material delivers more durability and comfortProfessional grade studio monitor headphones with a detachable cable