SENNHEISER HD 820

Description

With these revolutionary closed dynamic headphones passionate
music lovers can now enjoy their music on audiophile
level wherever they want, at home or on the go. Contains unique
glass transducer that minimizes resonance, HD 820 simply
are the clearest closed headphones in the world, which has expanded so far
the limits of what has been achieved in the sound reproduction of closed types of headphones.

Specifications
Impedance 300 Ohms
Frequency response (Headphones) 12 - 43800 Hz (-3 dB)
6 - 48000 Hz (-10 dB)
Sound pressure level (SPL) 103 dB at 1 kHz, 1V
Ear coupling around the ear
Jack plug 6.3 mm / Pentaconn / (XLR4)
Cable length 3 m
Weight 360 g without cable
Transducer principle (headphones) dynamic, closed

What's in the box?
Headphones HD 820 (closed, dynamic headphones)
connection cable: 1” (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
microfiber cloth