Audio-Technica ATH-M20x หูฟังสตูดิโอ Professional Headphones  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.  More About the M-Series Headphones  Critically acclaimed M-Series professional monitor headphones deliver accurate audio and outstanding comfort, perfect for long sessions in the studio and on the go. Contoured earcups seal tight for excellent sound isolation, with minimal bleed. And the pro-grade materials are durable, yet comfortable. Find out why online reviewers, top audio engineers, and cult followers agree, M-Series is an unmatched combination of audio and build-quality that gets the job done. Hour after hour, year after year.  Feature.   Advanced build quality and engineering 40 mm drivers with rare earth magnets and copper-clad aluminum wire voice coils Tuned for enhanced low-frequency performance Circumaural design contours around the ears for excellent sound isolation in loud environments Convenient single-side cable exit Designed for studio tracking and mixing Specs.   Type Closed-back dynamic Driver Diameter 40 mm Magnet Neodymium Voice Coil Copper-clad aluminum wire Frequency Response 15 - 20,000 Hz Maximum Input Power 700 mW at 1 kHz Sensitivity 96 dB Impedance 47 ohms Weight 190 g (6.7 oz), without cable and connector Cable 3.0 m (9.8'), straight, left-side exit Accessory Included 6.3 mm (1/4") snap-on adapter