Completely closed. Outrageously open.
The HD 820 fuses our 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
A closed
back headphone able to produce the wide, natural sound field of an open one
requires rethinking the directional characteristics of sound waves.
Each and every part of the HD 820 has been crafted by experts to give you the best performance.
The impedance-matching cable is specially tuned and symmetrical to reduce capacitance. It has silver-wrapped OFC wires and ends with a balanced 4.4mm gold-plated jack.
This offers superior contact resistance.
Fellowship of the Ring
An achievement in its own right, the 56mm ring radiator found in the HD 820 l
everages the key benefit of a large diaphragm transducer—air displacemen
t—without losing the rigidity that favorably impacts rest and response times.
Instead of a single attachment on the outer circumference of the transducer, both outer and inner edges
of the 'ring' are secured to the drive unit. The voice coil vibrates the diaphragm, connected to the V-shaped
groove found near the center of the ring. The headphone’s vibration-damping chassis and inert headband insert
provide complete stability, resulting in astonishing speed and accuracy throughout the entire frequency spectrum.
What you put into the HD 820 is precisely what you will get out of it, too. Each transducer is manufactured, tested,
and measured to an extremely tight tolerance to ensure the most dependable performance out of the box.
Each HD 820 also includes the frequency response plot unique to that set’s serial number, sparing no resource
to help you retrieve the most critical details from every corner of your music collection.
