The audiophile headphones all others are measured against. Combining the care devoted to a handcrafted instrument and the precision of modern manufacturing, the HD 800 S lets you explore your entire music collection from the inside out. The Exploration of Sound The HD 800 S demonstrates over 75 years of audio expertise, redefining the critical listening experience. It Has a Ring to It The heart of the HD 800 S and its striking sound is the 56mm Ring Radiator transducer. Solid as a Rock The headphones’ vibration damping chassis and inert headband insert provide complete stability—what you put into the HD 800 S is precisely what you will get out of it. Features Reference class open-back audiophile headphones 56mm Ring Radiator dynamic transducer system Impressively natural and spatial listening experience Acoustic absorber system prevents frequency masking for unheralded detail Ultra-ergonomic adjustable metal headband with inner damping element Luxuriously comfortable microfiber ear and headband padding on key contact points Premium matte black metal components Developed in Germany and precision-built at Sennheiser’s state-of-the-art Ireland plant Impedance: 300 ohms Frequency Response: 4 - 51,000 Hz (-10 dB) Total harmonic distortion: 0.02 % (1 kHz 1 Vrms) All the World’s a Stage The HD 800 S features a mesmerizing soundstage that seemingly transports the listener into the recording environment. Advanced sound reproduction system Delivered by the high-performance transducer with incredible extension. Behind the Mask Using a high-performance transducer with incredible extension is just one element of the HD 800 S and its advanced sound reproduction system. An Ergonomic Treat The HD 800 S delivers on long-term wearing comfort too, providing a listening experience as luxurious as it is immersive.