Sennheiser HD 820

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.

• The new audiophile standard for closed-back headphones

• Concave Gorilla Glass reflectors deliver impressive spatial sound reproduction

• Ultra-ergonomic adjustable metal headband with inner damping element

• Developed in Germany and precision-built at Sennheiser's state-of-the-art Ireland plant

• Frequency Response: 6 - 48,000 Hz (-10 dB)

• 56mm Ring Radiator dynamic transducer system

• Acoustic absorber system prevents frequency masking for unheralded detail

• Luxuriously comfortable microfiber ear and headband padding on key contact points

• Impedance: 300 ohms

• 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)

Impedance: 300 Ω

Total harmonic distortion (THD): < 0.02% (1 kHz, 100 dB)

Cable length: 3 m

Adapter: XLR-4, balanced, 4-pin Stereo jack plug: 1/4" (6.35 mm), unbalanced, 3-pin 4.4 mm, balanced, 5-pin

Transducer principle: dynamic, open

Weight: 360 g

Ear coupling: circumaural

Magnetic field: 10.5 mT