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Sennheiser HD820 Closed-Back Dynamic Headphones

Sennheiser's premier closed-back headphones, the HD820 provides the legendary Sennheiser sound with additional noise isolation.

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Audiophile quality anywhere

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 HD820 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.

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.

Innovative design

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.

Quality from the start

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.

What’s Included

• HD820 headphone

• 3m cable, 6.3mm unbalanced with 4.4mm balanced adapter

• Storage box

• Instruction manual

• Microfiber cloth


• Style:

• Transducer Type:

• Transducer Size:

• Frequency Response:
6 Hz - 48,000 Hz

• THD:
< 0.02% (1 kHz, 100 dB)

• Sound Pressure Level:
103 dB (1 V)

• Impedance:
300 ohms

• Weight:
360 grams

HD820 Cup

About Sennheiser

You can't go wrong with any Sennheiser product, from the classic HD 660S to the detailed HD 800S. Sennheiser's headphones are known for quality, comfort, and a sound signature that can please any taste.