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Sennheiser HD820 Closed Back HiFi Headphones with Replaceable Cable

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- Only 1 left

  • New closed back design with Gorilla Glass transducer cover

  • New acoustical absorber enhances high frequency and bass extension

  • Realistic and natural sound field with minimal resonance

  • 4.4mm Pentaconn cable and standard 6.35mm cable included

Sennheiser HD820 Closed Back HiFi Headphones with Replaceable Cable

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Sennheiser Orpheus Club - Authorised Dealer

Sennheiser Orpheus Club - claim extra warranty and benefit from our in depth product knowledge.

Sennheiser HD820

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. Developed and made in Germany, they offer an incredibly realistic, natural sound field and also stand apart by the extraordinary attention given to every detail of their design. Their soft comfortable microfiber ear pads are hand crafted, providing excellent attenuation of ambient noise, while the robust metal headband includes an inner damping element. Get ready for an unparalleled listening experience.

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 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.

We have Sennheiser's Orpheus range headphones and amplifiers on demonstration in our amazing purpose built demo room that is kitted out with everything you will need to audition your stunning new Sennheiser headphone or amp.

Audio experts are on hand, eager to answer any questions you may have and to demonstrate the very best headphones and hifi accessories. As you lose yourself in your favourite music, tell us what your ears are feeling, and we will help fine tune your set up until it is perfect for you.


Headphone Demonstration Room




What Hi-Fi? Sound & Vision Celebrates HD820 with 5 Star Review

What Hi-Fi?

“The HD820 are pricey, but they are the most capable pair of closed-back headphones we’ve tested.”



  • Headphones HD 820 (closed, dynamic headphones)
  • Connection cable: 6.35mm stereo jack plug (connected ex works), unbalanced
  • 4.4 mm Pentaconn stereo jack plug, balanced
  • USB flash drive (SD-U16L version) with instruction manual (as PDF file) and individually diffuse-field frequency response curve
  • Storage box



Discover Club Orpheus

Club Orpheus takes its name from the legendary Orpheus headphones. Released in 1991, Orpheus is still regarded as the most exclusive and expensive headphone ever produced. Its limited run of only 300 pieces, combined with unparalleled levels of engineering and component choice, means the Orpheus has left its mark on the audio world forever.

Club Orpheus has been created around the very same values as this superlative product - its members represent the finest and most experienced audio retailers in the UK. In buying from a Club Orpheus member, you receive a range of benefits not found anywhere else. These include unparalleled expertise and first-class service. You can also be confident that you are getting the very best in quality from an approved Sennheiser specialist.


Sennheiser Club Orpheus


Club Orpheus Advantages

  • Exclusive access to the best Sennheiser products
  • Confidence that you are buying from an approved Sennheiser specialist
  • Extended warranties on selected Sennheiser products in the Orpheus range
  • First class dedicated customer service
  • Priority product support
  • Demonstration facilities with unparalleled expertise

Follow the link to discover the Club Orpheus headphone and amplifier range.

Product TypeHeadphones
Feature KeywordClosed, Comfortable, Hi-Fi, Noise Isolation, Over Ear, Over Head, Professional, Studio
Recommended UseDigital audio player, Hi-Fi, Portable audio system, Studio
Manufacturer Warranty10 Years
Included AccessoriesSingle ended audio cable with 6.35mm termination, Balanced audio cable with 4.4mm Pentaconn termination
Part Number507435
Headphone Fit TypeOver Ear
Headphones TypeHeadphones - binaural
Cable EntryDual Sided
Cable Length3m
Connector AngleStraight
Connector TypeN/A
Detachable CableYes
Driver Size56mm
Driver TypeDynamic
Connectivity TechnologyWired
Earcup DesignClosed Back
Frequency Response6Hz - 48kHz
Headphones Form FactorOver Ear
Headphones TechnologyDynamic
Number of DriversN/A
Sound Isolation (dB)No
Sound Output ModeStereo
Smartphone CompatibilityN/A
Smartphone ControlsNo
Total Harmonic Distortion (THD)No
Wireless TechnologyN/A

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