Engineered for digital program materials, the Audio-TechnicaATH-M3X closed-back dynamic stereo headphones are equipped with high-performance drivers and low-mass diaphragms for maximized power handling capability. The closed-back design of the earpieces isolates the listener from distracting sounds. The headphones incorporate 40mm drivers to deliver wide dynamic range. Diaphragms only 25 microns thick provide the ATH-MX3 with a frequency range extending from 20 to 21,000 Hz. They feature soft leatherette earpads and adjustable headband and include a 9.8' cable with 3.5 mm stereo mini-plug and 1/4" (6.3 mm) phone plug adapter.