The ATH-M20x professional monitor headphones are a great introduction to the critically acclaimed M-Series line. Modern design and high-quality materials combine to deliver a comfortable listening experience with enhanced audio and effective isolation. An excellent choice for tracking and mixing. FEATURES Robust build quality and advanced technology 15Hz-20kHz frequency response 40mm drivers with rare earth neodymium magnets and copper-clad aluminum wire voice coils Tuned for enhanced low-frequency performance Circumoral design contours around the ears for excellent isolation in loud environments Optimized for studio tracking and mixing Tech Specs Type: Wired Open/Closed: Closed Fit Style: Circumaural (Around the Ear) Driver Size: 40mm Noise Attenuation: Passive Noise Isolating Frequency Response: 15Hz-20kHz Impedance: 47 ohms Cable Type: Straight Cable Length: 9.8' Plug Size: 1/8", 1/4" adapter Features: Swivel Earcup Color: Black Weight: 0.42 lbs. (without cable and connector)