[. . . ] [. . . ] Designed, constructed and assembled in Germany, the HD 800 are probably the world's first headphones ever to truly make you forget you are wearing any. A masterpiece built by handcraft Sennheiser`s most advanced driver technology: 56 mm ring radiator driver (patent pending) Biggest coil (40 mm) and magnet (42 mm) yet to deliver natural sound field Curved sonic wave front simulates spatial hearing experience (patent pending) Metal headband with inner damping element (patent pending) Four wire OFC cables with gold plated plugs Handcrafted ear pads, made of high-quality microfiber fabric Special high precision headphone connectors Type: open, circum-aural dynamic stereo headphones Technical Data Model EAN No. Transmission range Transducer principle Frequency response Nominal impedance Sound pressure level at 1 kHz Max. nominal long-term input power Harmonic distortion Contact pressure Ear coupling Weight (without cable) Jack plug Connecting cable HD 800 4044156002354 615104102958 500319 6­51000 Hz (-10 dB) 14­44100 Hz (-3 dB) open, dynamic (ring radiator) 8­50, 000 Hz 300 O 102 dB SPL (1kHz, 1 Vrms ) 500 mW in acc. 3. 4 N ± 0. 3 N circum-aural 330 g ¼" (6. 3 mm) stereo silver-plated, oxygen free (OFC), copper cable, symmetrical, Kevlar reinforced, 3 m - 10 °C to + 55 °C 273 x 348 x 149 4 English 532524 02/09 Operating temperature Packaging dimensions (W x H x D in mm) Units per carton Languages Printed in Germany Sennheiser is a registered trademark of Sennheiser electronic GmbH Co. [. . . ] [. . . ]