Enjoy dedicated headphone listening with the privacy of a closed-back design. The Sennheiser HD 820 combines Ring Radiator transducers with distinctive concave glass covers, engineered to manage internal reflections and support a spacious presentation.
Key Features
- Ring Radiator transducers – a dynamic design with a very wide frequency response, from 12Hz to 43.8kHz (-3dB).
- Concave glass transducer covers – redirect sound from the rear of the driver into an absorber, reducing resonances in the sealed cup.
- Closed-back circumaural design – isolates you from your surroundings while keeping the sound open and transparent.
- Balanced cable – a 3 m impedance-matched, low-capacitance cable with silver-clad OFC conductors and a gold-plated 4.4 mm plug.
- Handcrafted ear pads – combined with a damped metal headband for comfort and stability.
Good to Know
With a 300-ohm impedance, the HD 820 benefits from a capable dedicated headphone amplifier, ideally with a balanced output. It is manufactured in Germany.
Technical Specifications
- Type: Dynamic, closed-back, circumaural
- Transducer: Ring Radiator with glass covers
- Impedance: 300 ohms
- Frequency response: 12Hz–43.8kHz (-3dB); 6Hz–48kHz (-10dB)
- Sound pressure level: 103dB (1kHz, 1V)
- Connectors: 6.35 mm; 4.4 mm balanced
- Cable: 3 m, silver-clad OFC, balanced
- Weight: 360 g (without cable)
Shipping & Returns
Free UK Delivery – We ship exclusively within the United Kingdom. Orders are processed within 1 business day, with estimated delivery in 5–8 business days after dispatch.
30-Day Returns – Returns are accepted within 30 days of delivery, subject to our Return & Refund Policy.
Customer Support – Monday–Friday, 9 AM–5 PM (UK local time). Business days exclude weekends and UK bank holidays.