Sennheiser HD820

The great acoustic system with no compromises

Sennheiser HD820’s cutting-edge acoustic capabilities are combined with excellent noise reduction in the HD 820. Until recently, an open-back design or loudspeakers were the only options for an audiophile headphone experience. The HD 820 uses revolutionary acoustical technologies in a closed. Dynamic headphone to deliver reference-grade audiophile sound quality without sacrificing detail or sound field.

Wide soundstage while private listening experience

The closed, noise-isolating construction is ideal for luxuriously private listening, while the Ring Radiator transducers provide exceptional detail and extension. Although the HD is a closed headphone, the glass reflector plates with an internal absorber system imitate the open sound of loudspeakers, giving you a wide sound stage.

Reference-class sound due to concave glass reflectors

Precision concave glass reflectors, one for each earcup, provide the Sennheiser HD820 with its reference-class sound.
These functional panels reflect energy from the driver’s back to a carefully tuned absorber system, enabling the waves to behave like open headphones like the Sennheiser HD820.
As a consequence, you’ll hear a sound stage as you’ve never heard before in sealed headphones.
The vibration-damping headband of the headphones offers full stability while minimizing crosstalk.
You will get out of the HD 820 exactly what you put into it.
To guarantee the most reliable performance right out of the box, each transducer produced, tested, and measured to an exceptionally tight tolerance.
Each HD 820 also comes with a frequency response map specific to that set’s serial number. So you can get the most important information from every part of your music collection.

Sennheiser HD820 Air displacement as the key benefit

The HD 820’s 56mm Ring Radiator transducer takes use of a big diaphragm speaker’s main advantage: air displacement. The “ring” is attached to the drive unit on both the outer inner sides to maintain it stiff for quick rest and reaction periods. As a consequence, precise response throughout the full frequency spectrum is achieved.

Sennheiser HD820 Specifications

• Frequency response: 6 – 48,000 Hz
• Impedance: 300 Ohms
• THD: <0.02%
• Sensitivity: 103 dB at 1 kHz, 1V
• Cable: Detachable, 3 meters (9.8 feet) in length
• Weight without cable: 360 grams (12.6 ounces)
• Included accessories: 3-meter cable with 6.3mm stereo plug (¼ inch), 3-meter balanced cable with 4.4mm Pentaconn plug, USB manual with frequency response plot, deluxe storage box