Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

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The critics said closed headphones could never sound as immersive as their open-air counterparts. They said physics would never allow it. To that, we simply said, “listen”. The HD 820 combines an innovative glass reflector and ring radiator transducer technology for a benchmark listening experience.


Sale price$3,499.00

Key features

Closed-back earcups

56mm ring radiator transducers

German craftsmanship

Detachable cable

Frequency response 6 Hz - 48,000 Hz

Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

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Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

The Sennheiser HD 820 is a reference-class closed-back audiophile headphone designed for listeners who want the detail, imaging, and spacious presentation of high-end open-back headphones without giving up the isolation of a closed-back design. Its innovative Gorilla Glass reflectors and large 56mm Ring Radiator transducers work together to create an exceptionally wide and natural sound field with precise stereo imaging.

Built with German engineering and precision-manufactured in Ireland, the HD 820 combines advanced acoustic technology, premium materials, and long-session comfort in a sophisticated 360 g design. With a 6 Hz–48 kHz frequency response, 300-ohm impedance, and extremely low <0.02% THD, it is engineered for highly accurate, revealing playback.

Whether you're critically evaluating recordings, enjoying high-resolution music, or building a serious headphone-based listening system, the HD 820 is designed to deliver a highly immersive and uninterrupted audiophile experience.

Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

Reference-Class Closed-Back Sound

The HD 820 delivers an exceptionally detailed and spacious listening experience while maintaining the privacy and isolation of a closed-back headphone. It is an excellent choice for audiophiles who want immersive sound without the sound leakage associated with open-back designs.

Its sophisticated acoustic architecture is designed to preserve detail, imaging, and realism across a wide range of music.

Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

Innovative 56mm Ring Radiator Transducers

The large 56mm Ring Radiator dynamic transducers are engineered to provide fast, accurate, and controlled sound reproduction across the frequency spectrum. Their unique construction combines the air-moving capability of a large diaphragm with excellent rigidity for precise transient response.

Each transducer is manufactured, tested, and measured to extremely tight tolerances, helping ensure consistent reference-level performance.

Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

Gorilla Glass Reflectors for Expansive Imaging

The HD 820 uses distinctive concave Gorilla Glass reflectors to manage sound reflections inside the closed earcups. This innovative approach helps create a remarkably wide and natural stereo presentation that challenges traditional expectations of closed-back headphones.

The result is precise spatial imaging that can make vocals, instruments, and recording environments feel more distinctly positioned around you.

Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

Exceptional Detail and Low Distortion

With a frequency response of 6 Hz–48,000 Hz and total harmonic distortion of less than 0.02%, the HD 820 is designed to reproduce recordings with exceptional accuracy. Its acoustic absorber system also helps prevent frequency masking, allowing subtle details to remain clear and audible.

For critical listening, this means you can hear more of the character, texture, and nuances contained within high-quality recordings.

Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

Premium Comfort and German Engineering

The HD 820 combines German-developed engineering with precision manufacturing at Sennheiser's state-of-the-art Ireland facility. Its adjustable metal headband, damping elements, soft microfiber padding, and dual-axis earcup articulation are designed for a secure and comfortable fit.

The carefully engineered seal helps reduce unwanted ambient sound, while the plush contact points make the headphones suitable for extended listening sessions.

Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

Flexible Audiophile Connectivity

The HD 820 comes with impedance-matched, ultra-low-capacitance cables for connecting to a variety of high-end audio equipment. The included 6.35mm unbalanced and 4.4mm balanced connections provide flexibility for headphone amplifiers, DACs, digital audio players, and A/V receivers.

With 3-meter cables and an optional XLR-4 balanced connection available, the HD 820 can easily integrate into a serious home, desktop, or studio listening setup.

Sennheiser HD 820 Closed Back Over Ear Wired Audiophile Headphones

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