Innovative engineering has empowered Sennheiser to design a set of closed-back headphones that rise to the challenge of surpassing open-air quality. Sweetwater’s studio engineers agree that the HD 820 succeeds on all counts. Experience reference-class quality, thanks to the concave Gorilla Glass reflectors that are specially tuned to reflect energy from the drivers to a precision-engineered acoustic absorption system, eliminating interior resonance and distortion, mimicking open-air audio. Stability, comfort, and quality are masterfully blended, with 56mm ring radiator dynamic transducers secured directly to the drive unit on its inner and outer edges, coupled with an ergonomic form factor, microfiber padding, and adjustable metal headband. Unprecedented closed-back quality abounds with these German-developed, Irish-built, state-of-the-art headphones, boasting a frequency response range of 6Hz to 48kHz and a total harmonic distortion of 0.02%. Rest assured: you’ll enjoy unmatched playback with closed-back comfort, everywhere you go.

Sennheiser HD 820 Closed-back Headphones Features:

• Designed in Germany and expertly assembled in Sennheiser’s advanced Ireland plant to ensure high-quality audio right out of the box
• HD 820 sets each have a frequency response plot unique to their serial number
• Gorilla Glass reflectors divert energy from drivers to deliver open-air quality with closed-back comfort
• 56mm Ring Radiator dynamic transducers mount to the driver for superior structural and audio stability
• Acoustic absorption system prohibits frequency masking and prevents interior distortion and resonance for precise audio detail
• Adjustable, ergonomic metal headband and earcups feature luxurious microfiber padding for maximum comfort
• Jack plug options include XLR-4, 1/4-inch, and 4.4mm for versatile connectivity
• Impedance: 300 ohms
• Frequency Response: 6Hz–48kHz @ -10dB, 12Hz–43.8kHz @ -3dB
• SPL: 103dB @ 1kHZ, 1V
• Magnetic field: 10.5 mT