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English | HD 820
Features of the HD 820
• Closed-back, dynamic reference headphones
• Circum-aural, wired
• Natural listening experience – realistic and natural sound field with
minimal resonance
• 56 mm ring radiator transducers – unique, innovative dynamic trans-
ducer design
• Closed acoustic diffraction housings with convex glass panes for
outstanding acoustics and a visible transducer architecture
• Absorber technology – unwanted rear sound is directed into damp-
ened chambers and eliminated
• Specially tuned balanced, impedance matching cables with low
capacitance
• Special high-precision ODU connectors
• Handcrafted ear pads, made of high-quality microfiber fabric
• Metal headband with inner damping element
• Developed in Germany
• Handcrafted in Ireland
• 2-year warranty
2
Comfortable: The sophisticated headband
Advanced: Materials developed in the
design guarantees ultimate wearing com-
aerospace industry offer minimal weight
fort for long hours of listening.
and maximum stability.
The acoustic diffraction housing
1
4
Besides the advantage of isolating external noise and leakage from
inside, closed-back headphones offer excellent reproduction of low
tones and bass. Decisive for an as spatial and airy sound reproduction
as possible, however, is an optimal damping behavior which ensures
that, despite profound basses, the mid-range and high frequencies are
not affected negatively.
Reliable: The high-precision ODU con-
nectors and balanced connections ensure
safe signal transmission.
The HD 820's patent-pending
acoustic diffraction housing with
its convex glass pane made of
2
Gorilla glass ( 1 ) provides an
optimal damping behavior. The
sound waves ( 3 ) produced by
3
the diaphragm ( 2 ) are reflected
by the hard surfaces of the
diffraction housing and directed
in a controlled manner into the
ring-shaped absorber elements ( 4 )
located around the transducers.
The pressure and speed of the
4
sound waves are therefore always
controllable and negative side
effects are avoided. The result
is a clear, interference-free and
spatial sound reproduction over
the entire frequency spectrum,
from about 6 Hz to 48,000 Hz,
which is unequaled in closed-back
headphones.
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