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Sennheiser - HD 820 Over-the-Ear Audiophile Headphones - Ring Radiator Drivers with Glass Reflector Technology, with Balanced Cable - Black

Model: HD 820
SKU: 6442577
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  • Key Specs
    • Connection Type: Wired
    • Carrying Case: false
    • Headphone Fit: Over-the-Ear
    • Adjustable Headband: true
  • General
    • Brand: Sennheiser
    • Model Number: HD 820
    • Product Name: HD 820 Over-the-Ear Audiophile Headphones - Ring Radiator Drivers with Glass Reflector Technology, with Balanced Cable
    • Color: Black
  • Audio
    • Sound Isolating: true
    • Environmental Noise Control: true (A technology that automatically or manually adjusts, or eliminates, ambient background sound to allow conversational voices to be heard clearer.)
    • Minimum Frequency Response: 6 hertz (Describes the maximum range of frequencies or musical tones a product can reproduce, from very low tones to very high treble tones. The minimum frequency or musical tone the speaker can reproduce. High treble tones have higher frequencies while low tones and deep bass have lower frequencies.)
    • Maximum Frequency Response: 48 kilohertz (Describes the maximum range of frequencies or musical tones a product can reproduce, from very low tones to very high treble tones. The maximum frequency or musical tone the speaker can reproduce. High treble tones have higher frequencies while low tones and deep bass have lower frequencies.)
    • Impedance: 300 ohms (Describes the resistance of an electric signal throughout the system. Devices with low impedance require less power to deliver optimal signals but are more at risk for damage from overloading. Higher impedance requires more power but is more protected from overload damage.)
    • Sensitivity: 103 decibels adjusted
    • Driver Size: 56 millimeters
  • Connectivity
    • Connection Type: Wired
    • Connector Size: 1/4 in. (6.35mm)
    • Detachable Cord: true
    • Tangle-Resistant Cord: false
  • Features
    • Carrying Case: false
    • Bone Conducting Technology: false
    • High Resolution Audio: The HD 820 delivers an unparalleled, reference-grade audiophile listening experience in a closed headphone. The HD 820 fuses Sennheiser's leading-edge acoustic capabilities with exceptional reduction of ambient noise. Until now, the audiophile headphone experience could only begin with an open back design or loudspeakers. The HD 820 sacrifices neither detail nor sound field by using breakthrough acoustical systems in a closed, dynamic headphone. (Hear music the way musicians and sound technicians intended it to be heard. Products that support hi-res audio deliver audio signals with a dynamic range and bandwidth far greater than that of a standard CD so you'll be able to enjoy pure music with outstanding sound quality. The device supports high-resolution audio signals, which more closely resemble the quality of music as it was originally recorded, with more texture and detail than can be heard via typical music streaming services or CDs.)
  • Design
    • Headphone Fit: Over-the-Ear
    • Adjustable Headband: true
    • Foldable Design: false
  • Dimensions
    • Product Height: 7.5 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
    • Product Width: 8 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
    • Product Weight: 0.79 pounds (The out of box weight of the item.)
    • Cord Length: 9.8 feet
  • Other
    • UPC: 615104300439

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. Developed and manufactured in Germany, the HD 820 is a closed, reference-grade audiophile headphone that a combines an innovative glass reflector and Ring Radiator transducer technology for a benchmark listening experience as vivid as it is uninterrupted. The HD 820 fuses Sennheiser's bleeding-edge acoustic capabilities with exceptional reduction of ambient noise. Until now, the audiophile headphone experience could only begin with an open back design or loudspeakers. The HD 820 sacrifices neither detail nor sound field by using breakthrough acoustical systems in a closed, dynamic headphone. The reference-class experience of the HD 820 is achieved with the use of precision concave glass reflectors, one capping each earcup. These functional plates reflect energy from the rear of the driver to a specially tuned absorber system, allowing the waves to mimic the behavior of open headphones such as the HD 800 S. The result is a sound stage never before experienced in a sealed headphone. The headphone’s vibration damping headband provides complete stability while reducing crosstalk. What you put into the HD 820 is precisely what you will get out of it. Each transducer is manufactured, tested, and measured to an extremely tight tolerance to ensure the most dependable performance out of the box. Each HD 820 also includes the frequency response plot unique to that set’s serial number, sparing no resource to help you retrieve the most critical details from every corner of your music collection. The 56mm Ring Radiator transducer found in the HD 820 leverages the key benefit of a large diaphragm speaker—air displacement. Both outer and inner edges of the “ring” are secured to the drive unit to keep it rigid for fast rest and response times. The result is accurate response spanning the entire frequency spectrum.

  • Reference-grade Sound: The HD 820 delivers an unparalleled, reference-grade audiophile listening experience in a closed headphone
  • Sound Isolation: Innovative glass reflectors and frequency absorber systems replicate the wide open characteristics of audiophile speakers in a sealed earcup design
  • Breathtaking Soundstage: 56mm Ring Radiator transducers and Glass Reflectors provide total immersion in your music with absolute detail and a breathtaking soundstage
  • German Engineering: Made in Germany using the finest materials for sound integrity, build quality, and luxurious comfort
  • Exceptional Warranty: Join millions of passionate audiophiles that choose Sennheiser and receive our global 2-YEAR WARRANTY with purchase.
  • Reference-grade Sound: The HD 820 delivers an unparalleled, reference-grade audiophile listening experience in a closed headphone
  • Sound Isolation: Innovative glass reflectors and frequency absorber systems replicate the wide open characteristics of audiophile speakers in a sealed earcup design
  • Breathtaking Soundstage: 56mm Ring Radiator transducers and Glass Reflectors provide total immersion in your music with absolute detail and a breathtaking soundstage
  • German Engineering: Made in Germany using the finest materials for sound integrity, build quality, and luxurious comfort
  • Exceptional Warranty: Join millions of passionate audiophiles that choose Sennheiser and receive our global 2-YEAR WARRANTY with purchase.
Whats Included
  • Headphones HD 820, closed-back, 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
  • Headphones HD 820, closed-back, 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

Q: Are these Sennheiser headphones noise-canceling?

A: These headphones have environmental noise control.

Q: What is the driver size of these headphones?

A: The Ring Radiator drivers in these headphones are 56 millimeters.

Q: Do these headphones come with a carrying case?

A: No, these headphones do not come with a carrying case.

Q: How long is the cord on these headphones?

A: The cord on these headphones is 9.8 feet long.

Q: What is the frequency response range of these headphones?

A: These headphones have a frequency response range of 6 hertz to 48 kilohertz.

Q: What is the warranty on these headphones?

A: These headphones come with a 2-year warranty.

Q: If my source is my iPhone 13, do I need an amplifier? Thanks.

A: yes or you need a 3.5m to iphone dongle (i believe its larger than the base dongle)