For audiophiles there wasn’t any doubt: When it came to circumaural headphones, the very best sound required an open-back design. This axiom has now been rendered obsolete by the youngest member of the Sennheiser Audiophile Range: the closed dynamic HD 820 employ an innovative technology that makes them sound breathtakingly transparent and natural.
Impedance: 300 Ohms Frequency response: 12 - 43800Hz (-3 dB), 6 - 48000Hz (-10 dB) Sound pressure level (SPL): 103dB at 1 kHz, 1V Ear coupling: around-ear Jack plug: 6.3mm / Pentaconn / (XLR4) Cable length: 3m Weight: 360g without cable Transducer principle (headphones): dynamic, closedBoxed Content: headphones HD 820 (closed, dynamic headphones). Connection cable: ¼” (6.35 mm) stereo jack plug (connected ex works), unbalanced. 4.4 mm Pentaconn stereo jack plug, balanced. XLR-4 connector, balanced. USB flash drive (SD-U16L version) with instruction manual (as PDF file) and individually diffuse-field frequency response curve. Instruction manual. Storage box. Microfibre cloth