Audio-Technica Professional Open-Back Reference Headphones Black (ATH-R70X) High-efficiency magnets and pure alloy magnetic circuit design reduce distortion and ensure accurate and extended high-frequency response Carbon composite resin improves structural rigidity to provide detailed transient response Acoustically transparent, aluminum honeycomb-mesh housings provide a natural and spacious open-back sound Breathable fabric earpads and improved wing support provide long-wearing comfort Feather-light weight (approx. 210 g w/o cable) and robust construction make headphones perfectly suited for professional use Unique, dual-sided detachable locking cable is L/R signal independent, always ensuring proper stereo orientation