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HD 820

HD 820

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Article number: 507435

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.


With these groundbreaking closed dynamic headphones passionate music lovers can now enjoy their music at an audiophile level wherever they please, at home or on the move. Featuring unique glass transducer covers that minimize resonances, the HD 820 are simply the most transparent-sounding closed headphones in the world, extending the boundaries of what has been achieved in sound reproduction with closed type headphones up to now.

Into the great wide open

Vivid, wide, transparent, natural. 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. Thus, the HD 820 not only open up the sound field, but also new places and opportunities for you to enjoy your music.

The technology of transparency

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.

An all-star team of excellent components

Made in Germany, the HD 820 stand apart also because of the extraordinary attention that is given to every detail: From the extra comfortable handcrafted ear pads that insulate the listener from ambient noise, to the silvercladded OFC cables and gold-plated plugs, to the robust metal headband with an inner damping element. This package offers an unparalleled listening experience, which can even be improved by the Sennheiser HDV 820 amplifier for dynamic headphones – the perfect companion to the HD 820.

Audiophile connectivity

Only what gets in can eventually get out. That’s why 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.

The look of superior quality

A well-conceived audio component always looks good – inside and out. With their unique glass covers the HD 820 display all the evidence to prove this. They are an aesthetical timeless classic and a natural technical beauty.


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 6.35 mm / 4.4 mm XLR-4 (optional)
Cable length 3m
Weight 360 g without cable
Transducer principle (headphones) dynamic, closed

What's 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 stereo jack plug, 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

Customer Reviews

Based on 5 reviews
Robert G.
Impressed with the HD 820

I'm a disabled veteran with severe tinnitus that can go to grade 5 which is also called catastrophic. In order to keep my tinnitus from going catastrophic I need to be able to effectively mask the ringing with clean, clear, dynamic audio. Poor quality audio has to be louder to mask and over time that negatively effects the eardrum. For many years now I've been using the HD800's paired with the HDVD800 amp to mask because the clarity of the audio is head and shoulders above any of the other headphones I've tried. Sadly the constant everyday use has taken it's toll on them and they've become a bit fragile so I decided I needed to get a new pair and put these away until I can get them refurbished. They still sound great. I was originally going to go with the 800S but after reading about the 820's I decided to give them a try even though every pair of closed back headphones I've tried were not good for my tinnitus. They made me feel like my head was in a can and, depending on the headphones, made my tinnitus go up. Within seconds of putting the 820's on I knew they were nothing like any other closed back headphones I'd ever tried and they even sounded better then every pair of high end headphones I tried except for the HD800. I love the fullness of the low end which is better then the 800's and the clarity overall is just as amazing yet I don't feel like I have my head in a can. Using them with my Luxman amp has me hearing my record collection in a very sweet new way. Their use literally relaxes me and when I'm relaxed my tinnitus comes down so thank you Sennheiser and keep up the good work....

Lof M
A way to another world

I had tried HD 820 and liked it very much before buying it on this website.
It has a kind of magic to lead a user to enter a wonderful world of music.

Cezary Podbilski
HD 820?

Hey are GOAT - I mean come on. Just buy them!

Devon Wheeler
Yeah wow

Worth it.


Sehr sehr geil!