HD 820 Audiophile Wired Closed-back Headphones

A benchmark listening experience as vivid as it is uninterrupted. The critics said closed headphones could never sound as immersive as their open-air counterparts. They said physics would never allow it. To that we simply said, “listen”. The HD 820 combines an innovative glass reflector and ring radiator transducer technology for a benchmark listening experience. Product Features: The new audiophile standard for closed-back headphones Concave Gorilla Glass reflectors deliver impressive spatial sound reproduction Ultra-ergonomic adjustable metal headband with inner damping element Developed in Germany and precision-built at Sennheiser’s state-of-the-art Ireland plant Frequency Response: 6 - 48,000 Hz (-10 dB) 56mm Ring Radiator dynamic transducer system Acoustic absorber system prevents frequency masking for unheralded detail Luxuriously comfortable microfiber ear and headband padding on key contact points Impedance: 300 ohms Total harmonic distortion: 0.02 % (1 kHz 1 Vrms) What's in the box: Headphones HD 820 (closed, dynamic headphones) Connection cable: ¼” (6.35 mm) stereo jack plug (connected ex works), unbalanced 4.4 mm stereo jack plug, balanced Instruction manual Storage box Microfiber cloth