The M-Series Audio Technica ATH-40x professional monitor headphones are tuned flat for incredibly accurate audio monitoring across an extended frequency range. Your studio experience is enhanced with superior sound isolation and swivelling earcups for convenient one-ear monitoring. Engineered with pro-grade materials and robust construction, the M40x excels in professional studio tracking and mixing, as well as DJ monitoring.Audio Technica ATH-40x Information: Cutting-edge engineering and robust construction 40 mm drivers with rare earth magnets and copper-clad aluminium wire voice coils Tuned flat for incredibly accurate sound monitoring across the entire frequency range Circumaural design contours around the ears for excellent sound isolation in loud environments 90° swivelling earcups for easy, one-ear monitoring Professional-grade earpad and headband material delivers more durability and comfort Collapsible for space-saving portability Detachable cable (includes 1.2 m – 3.0 m coiled cable and 3.0 m straight cable) For professional studio tracking and mixing, as well as DJ monitoring Available in Black only Specs: Frequency Response: 15 – 24,000 Hz Cable Length: Includes two interchangeable cables: detachable 1.2m – 3m coiled cable and detachable 3m straight cable Magnet: Neodymium Driver Diameter: 40 mm Voice Coil: CCAW (Copper-clad aluminium wire) Sensitivity: 98 dB Maximum Input Power: 1,600 mW at 1 kHz Weight: 240g without cable and connector Maximum Input Power: 1,600 mW at 1 kHz Impedance: 35 ohms