Sennheiser HD 25-1 II Headphones are closed-back, purpose-designed, professional monitoring headphones offering high attenuation of background noise. Capable of handling very high sound pressure levels and of extremely robust construction, these headphones perform exceptionally well in high-noise environments, example ENG, sound reinforcement, studio monitoring and audio equipment testing. The capsule is rotatable for one-ear listening. Ideal monitoring headphones for cameramen and DJs. Sennheiser HD 25-1 II Features Very lightweight and comfortable, even if used for long periods High maximum sound pressure level 70 Ohms nominal impedance for universal compatibility Tough, detachable steel cable Neodymium ferrous magnet systems and lightweight aluminium/copper voice AmericanMusical is an authorized dealer of Sennheiser products.