Sennheiser HD820 Headphones
The sound field of the HD 820 is wide open. Which is not what you would expect at all from closed circumaural headphones. With the HD 820 you can explore and rediscover your music in absolute reference-class quality without intruding on the aural comfort zone of others.
The breakthrough transparent performance of the HD 820 has been achieved through a special innovation: Their legendary Sennheiser Ring Radiator transducers are fitted with unique glass covers. Revealing the great look of the technical component within, this visually striking feature was actually developed wholly in service to the sound: The concave glass reflects the sound waves from the rear of the transducer to an absorber, which results in minimal resonance. Thus, the sound waves are effectively “gone” like they would be in open headphones.
For the ultimate in performance the HD 820 come with a specially tuned symmetrical, impedance-matching cable with low capacitance and a balanced 4.4 mm gold plug, which offers superior characteristics in contact resistance, and thus in sound. A standard 6.35mm jack is also supplied for ease of connection.
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 3m
Weight 360 g without cable
Transducer principle (headphones) dynamic, closed
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 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