Sennheiser HD 820
MPN #507435
Reference class open-back audiophile headphones, Closed-back earcups, 56mm ring radiator transducers and Impedance 300 ?
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.
Features
The new audiophile standard for closed-back headphonesConcave Gorilla Glass reflectors deliver impressive spatial sound reproductionUltra-ergonomic adjustable metal headband with inner damping elementDeveloped in Germany and precision-built at Sennheiser's state-of-the-art Ireland plantFrequency Response: 6 - 48,000 Hz (-10 dB)56mm Ring Radiator dynamic transducer systemAcoustic absorber system prevents frequency masking for unheralded detailLuxuriously comfortable microfiber ear and headband padding on key contact pointsImpedance: 300 ohmsTotal harmonic distortion: 0.02 % (1 kHz 1 Vrms)
Specifications
Frequency response (speaker): 6 Hz - 48,000 Hz
Sound pressure level (SPL): 103 dB (1 V)
Impedance: 300 ?
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
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