Sennheiser HD 820 is Wide-open Sound in a Closed-back, Over-ear, Dynamic Headphone
- The performance of the in a closed back headphone
- Unique engineering to manage reflections and preserve a cohesive sound in a closed-back headphone
- 56mm Ring Radiator dynamic transducer system
- Ultra-ergonomic adjustable metal headband with inner damping element
- Luxuriously comfortable microfiber ear and headband padding on key contact points
- Developed in Germany, precision-built at Sennheiser’s state-of-the-art Ireland plant
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The New Audiophile Standard
The critics said closed headphones could never sound as immersive as their open-air counterparts. They said physics would never allow it. To that, Sennheiser simply said, “listen."
The HD 820 combines an innovative glass reflector and ring radiator transducer technology for a benchmark listening experience.
Completely Closed. Outrageously Open.
The HD 820 fuses cutting-edge transducer capabilities with exceptional ambient noise attenuation, transcending the perceived limits of closed headphones.
Until now, the audiophile headphone experience could only begin with Sennheiser’s open back design—a design that paved the way for an entire class of precision listening devices. This standard of sound reproduction would go on to surpass Hi-Fi systems exponentially larger in size and cost with the understanding that listeners would not be isolated from their surroundings. The HD 820 sacrifices neither detail nor sound field thanks to its innovative acoustical systems in a closed, dynamic headphone.
Reflecting Within
While sealed headphones offer the utmost privacy, redirected energy can create resonance and distortion within the ear chamber. The reference-class experience of the HD 820 is achieved with the use of precision concave glass reflectors. Located on the outer plane of each ring radiator transducer, this functional plate reflects energy from the rear of the driver to a specially-tuned absorber system, allowing the waves to mimic the behavior exhibited in open-air models with striking visual flair.
Specifications
- Impedance: 300Ω
- Frequency Response: 6 - 48,000 Hz (-10 dB)
- Total harmonic distortion: 0.02 % (1 kHz 1 Vrms)
- Frequency response (speaker): 6 Hz - 48,000 Hz
- Sound pressure level (SPL): 103 dB (1 V)
- Total harmonic distortion (THD): < 0.02% (1 kHz, 100 dB)
- Transducer principle: Dynamic, Open
- Connection Cables: Silver-plated, oxygen-free copper (OFC), balanced, shielded, para-aramid reinforced
- Weight: 12.7 oz (360g)
- Ear coupling: circumaural
- Magnetic field: 10.5 mT
In the Box
- HD 820 Headphones w/ Storage Box
- Connection Cables:
- 11' (3.4m) ODU to 6.3mm 1/4" Stereo
- 11' (3.4m) ODU to 4.4mm Balanced
- Microfiber Cloth