The HD 820 fuses Sennheiser's bleeding-edge acoustic capabilities with exceptional reduction of ambient noise. Until now, the audiophile headphone experience could only begin with an open back design or loudspeakers. The HD 820 sacrifices neither detail nor sound field by using breakthrough acoustical systems in a closed, dynamic headphone.
One Year Warranty
The HD 820 delivers an unparalleled, reference-grade audiophile listening experience in a closed headphone
Innovative glass reflectors and frequency absorber systems replicate the wide open characteristics of audiophile speakers in a sealed earcup design
56mm Ring Radiator transducers and Glass Reflectors provide total immersion in your music with absolute detail and a breathtaking soundstage
Made in Germany using the finest materials for sound integrity, build quality, and luxurious comfort
Reference-grade audiophile sound quality
Closed, noise isolating design for luxuriously private listening
Made in Germany from purpose-built materials
Ring Radiator transducers for incredible detail and extension
Glass Reflector plates with internal absorber system mimic the open sound of loudspeakers
Sennheiser HD 820
Developed and manufactured in Germany, the HD 820 is a closed, reference-grade audiophile headphone that a combines an innovative glass reflector and Ring Radiator transducer technology for a benchmark listening experience as vivid as it is uninterrupted.
The technology of transparency
The breakthrough transparent performance of the HD 820 has been achieved through a special innovation: Their legendary Sennheiser Ring Radiator transducers are fitted with unique glass covers. Revealing the great look of the technical component within, this visually striking feature was actually developed wholly in service to the sound: The concave glass reflects the sound waves from the rear of the transducer to an absorber, which results in minimal resonance. Thus, the sound waves are effectively “gone” like they would be in open headphones.
An all-star team of excellent components
Made in Germany, the HD 820 stand apart also because of the extraordinary attention that is given to every detail: From the extra comfortable handcrafted ear pads that insulate the listener from ambient noise, to the silvercladded OFC cables and gold-plated plugs, to the robust metal headband with an inner damping element. This package offers an unparalleled listening experience, which can even be improved by the Sennheiser HDV 820 amplifier for dynamic headphones – the perfect companion to the HD 820.
Only what gets in can eventually get out. That’s why the HD 820 come with a specially tuned symmetrical, impedance-matching cable with low capacitance and a balanced 4.4 mm gold plug, which offers superior characteristics in contact resistance, and thus in sound.
The look of superior quality
A well-conceived audio component always looks good – inside and out. With their unique glass covers the HD 820 display all the evidence to prove this. They are an aesthetical timeless classic and a natural technical beauty.
What's in the box?
Headphones HD 820 (closed, dynamic headphones)
connection cable: ¼” (6.35 mm) stereo jack plug (connected ex works), unbalanced
4.4 mm stereo jack plug, balanced
USB flash drive (SD-U16L version) with instruction manual (as PDF file) and individually diffuse-field frequency response curve