ATH-M20x Professional monitor headphones Technical Information 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. Driver 40 mm Magnet Neodymium Voice Coil CCAW (Copper-clad aluminum wire) Frequency Response 15 - 20,000 Hz Maximum Input Power 700 mW at 1 kHz Sensitivity 96 dB Impedance 47 ohms Cable 3.0 m (9.8'), left-side exit Weight 190 g (6.7 oz) without cable and connector Included Accessories 1/4 (6.3 mm) snap-on adapter