Unique: The state-of-the art 56 mm ring
radiator transducers are the largest ever
used in headphones.
Extraordinary: The Gorilla glass directs
sound waves into dampened chambers
and drastically reduces distortion.
Perfect: The consistently balanced
connections ensure reliable signal
transmission to the transducers.
Sennheiser HD 820
The new benchmark among
closed-back headphones
The Sennheiser HD 820 opens up new tonal horizons and takes you into a
world full of musicality, passion and emotions – regardless of whether you
enjoy your favorite music at home or on the go.
After extensive research and development work, our engineers have
succeeded in bringing the best of both worlds together – the HD 820 combines, without compromise, the transparency and naturalness of the best
open-back headphones with the sovereignty and serenity of closed-back
systems.
The trend-setting design of the HD 820 not only effectively reduces ambient noise, but also ensures an ultra-low bass reproduction and a clear
reproduction of mids. This is possible due the HD 820's patent-pending
acoustic diffraction housing – recognizable by the two glass panes behind
the transducers.
Extremely stiff, convex elements made of Gorilla glass and shaped using
a specially developed process specifically direct the sound, which is
emanated from the diaphragm towards the rear, into dampened chambers. Therefore, reflected sound waves have virtually no chance of
disturbing the movement of the HD 820's advanced 56 mm transducers
and of compromising the precision of the audio reproduction.
To ensure perfect sound quality and ultimate wearing comfort, our developers have carefully thought through every detail of the headphones.
The crucial parts of the headphones are made from advanced materials –
materials that are also used in the aerospace industry for their low weight
and high stability.
Due to its double-shell construction, the housing of the Sennheiser HD 820
is extremely lightweight and stiff. The headphone yokes guarantee a
lasting, comfortable fit and are the result of complex mechanical strength
simulations and field tests. The supplied connection cables ensure perfect
contact between the headphones and any source device, be it mobile or
stationary.
The unique quality of these headphones is guaranteed and backed by our
name. Each Sennheiser HD 820 is therefore delivered with a signed chart
providing its individually measured frequency response curve and serial
number.
Technology-wise, the HD 820 breaks fresh ground and, with its powerful,
neutral and transparent sound, sets a new benchmark for closed-back
headphones.
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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
transducer 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
dampened 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
• Engineered and handcrafted in Germany
• 2-year warranty
Comfortable: The sophisticated headband
design guarantees ultimate wearing
comfort for long hours of listening.
Advanced: Materials developed in the
aerospace industry offer minimal weight
and maximal stability.
The acoustic diffraction housing
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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.
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Reliable: The high-precision ODU
connectors and balanced connections
ensure safe signal transmission.
The HD 820's patent-pending
acoustic diffraction housing
with its convex glass pane made
of Gorilla glass ( 1 ) provides
an optimal damping behavior.
The sound waves ( 3 ) produced
by 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
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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Important safety information
▷
Read this instruction manual carefully and completely before using the
product.
▷
Always include these safety instructions when passing the product on
to third parties.
▷
Do not use an obviously defective product.
Preventing damage to health and accidents
▷
Protect your hearing from high volume levels.
Permanent hearing damage may occur when headphones are used at
high volume levels for long periods of time. Sennheiser headphones
sound exceptionally good at low and medium volume levels.
▷
The product generates stronger permanent magnetic fields that could
cause interference with cardiac pacemakers, implanted defibrillators
(ICDs) and other implants. Always maintain a distance of at least
3.94"/10 cm between the product component containing the magnet
and the cardiac pacemaker, implanted defibrillator, or other implant.
▷
Keep the product, accessories and packaging parts out of reach of
children and pets to prevent accidents and choking hazards.
▷
Do not use the product in an environment that requires your special
attention (e.g. in traffic or when performing skilled jobs).
▷
Do not drop the product to prevent the glass panes of the ear cups
from shattering. Shattered glass can cause severe injuries.
Preventing damage to the product and malfunctions
▷
Always keep the product dry and do not expose it to extreme
temperatures (hairdryer, heater, extended exposure to sunlight, etc.)
to avoid corrosion or deformation.
▷
Do not place your headphones on a glass dummy head, chair armrest
or similar objects for long periods as this can widen the headband and
reduce the contact pressure of the headphones.
▷
Allow the product to stand for at least 2 hours before using it.
Condensation can form on the glass panes of the ear cups if the
headphones are moved from a cold environment to a warm
environment.
▷
Use only attachments/accessories/spare parts supplied or
recommended by Sennheiser.
▷
Clean the product only with a soft, dry cloth.
▷
Use the product with care and store it in a clean, dust-free environment.
HD 820 | English
Notes on the use and disposal of storage media
You can use the supplied USB flash drive for storing data, including
personal data. If the flash drive is sold/passed on or disposed of, the data
once stored on it and then deleted using a standard delete method can be
recovered with special software and be misused.
We therefore recommend using special software for secure deletion of data
to ensure that personal data is not misused. Please note that you yourself
are responsible for the secure deletion of the data on your flash drive.
We recommend backing up the data saved on your flash drive regularly.
Sennheiser does not accept liability for damage or loss of data.
Intended use/Liability
These closed-back, dynamic headphones have been designed for home use
with high-quality audio systems.
It is considered improper use when the product is used for any application
not named in the corresponding product documentation.
Sennheiser is not liable for damages to USB devices that are not consistent
with the USB specifications.
Sennheiser does not accept liability for damage arising from abuse or
misuse of this product and its attachments/accessories.
Before putting the product into operation, please observe the respective
country-specific regulations.
Package contents
• HD 820 closed-back, dynamic headphones
Connection cable
• 1/4" (6.35 mm) stereo jack plug (connected ex works), unbalanced
• 4.4 mm Pentaconn stereo jack plug, balanced
• XLR-4 connector, balanced
• USB flash drive (SD-U16L version) with instruction manual (as PDF file)
and individually measured diffuse-field frequency response curve
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English | HD 820
L
R
6.35 mm
UNBALANCED
4.4 mm
BALANCED
XLR-4
BALANCED
Your HD 820
Connecting the headphones
▷
Select the suitable connection cable for the audio source to which you
want to connect the headphones and change the connection cable as
described below:
• 1/4" (6.35 mm) stereo jack plug, unbalanced (can also be connected
to a 3.5 mm stereo jack socket by using a standard adapter)
• 4.4 mm Pentaconn stereo jack plug, balanced
• XLR-4, balanced
▷
Connect the headphones to your audio source.
For optimum music enjoyment, we recommend using a headphone
amplifier such as the Sennheiser HDV 820 and a balanced connection
cable such as the one equipped with the 4.4 mm Pentaconn jack plug.
Putting on the headphones and using them
▷
Put on your headphones and then pull the ear cups down until they
rest comfortably over the ears. Make sure you wear them the right way
round by observing the “R” (right) and “L” (left) markings on the ear cup
bands.
▷
Take the headphones off and use the slide scale on the headband to
ensure they sit symmetrically.
▷
After use, place the headphones into the storage box. Hang the cable
up unwound for the first few days after use. After that, you can store the
cable wound up loosely.
Changing the connection cable
To detach the connection cable:
▷
Hold the ear cup firmly and pull the connector straight out of the socket
by overcoming a slight resistance.
To attach the connection cable:
▷
Make sure the “R” (right) and “L” (left) markings on the connectors
match the markings on the ear cups.
▷
Align the latch of the connector with the socket and insert the
connector until it snaps into place with an audible click.
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HD 820 | English
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Care and maintenance
For reasons of hygiene, you should replace the ear pads, the inside dust
covers and the headband from time to time. Spare parts are available from
your Sennheiser partner. To find a Sennheiser partner in your country,
search at www.sennheiser.com.
▷
Clean the product only with a dry and soft microfiber cloth (supplied).
▷
Store the product in a clean, dust-free place, e.g. in its storage box.
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Cleaning and replacing the dust covers made from 3D Mesh
1. Pull the dust covers away from the ear cups without, if possible,
touching the transducers underneath.
Rinse the dust covers under running lukewarm water and let them air
dry.
2. Put the dust covers back in place and carefully tuck the edges underneath the ear pads.
1. Grasp behind the ear pads and pull them up and away from the ear cups.
Make sure to not damage the transducers on the inside of the ear cups.
2. Place the new ear pads onto the ear cups and attach the ear pads by
pressing firmly around them.
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Replacing the headband padding
1. Hold the headband firmly in the middle and detach the headband
padding from one side to the other.
2. Place the new headband padding onto the headband and attach it to the
headband's latches, starting from the middle and moving outwards.
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English | HD 820
Specifications
Frequency response
Transducer principle
Ear coupling
Frequency characteristic
Nominal impedance
Sound pressure level at 1 kHz
Long-term input power
THD
Contact pressure
Weight
Attenuation
Connector (depending on connection
cable, see pin assignment on inside
cover page), gold-plated
Connection cables
Temperature range
Relative air humidity
(non-condensing)
12 – 43,800 Hz (−3 dB)
6 – 48,000 Hz (−10 dB)
dynamic, closed-back
circum-aural
diffuse-field equalized
300 Ω
103 dB (1 V
max. 500 mW as per EN 60-268-7
≤ 0.02% (1 kHz, 100 dB SPL)
approx. 3,4 N ± 0.3 N
approx. 360 g (without connection
cable)
up to 25 dB
XLR-4, balanced, 4-pin
Stereo jack plug:
1/4" (6.35 mm), unbalanced, 3-pin
4.4 mm, balanced, 5-pin
silver-plated, oxygen-free copper
cable (OFC), balanced, shielded,
para-aramid reinforced, 3 m
operation: −10°C to +55°C
storage: −20 to 70°C
operation: 10 to 80%,
storage : 10 to 90%
rms
)
Sennhalaer
HD
820
,
,..,,
..
Reference diffuse-field frequency response curve
The individually measured diffuse-field frequency response curve for your
HD 820 headphones can be found on the supplied USB flash drive. The
reference diffuse-field frequency response curve can be found on the
inside cover page.
What is the diffuse-field frequency response curve? In an anechoic
chamber, 8 highly linear loudspeakers emit noise signals independently
of each other. In the central area of the chamber, the various sound data
meet and are superimposed on each other to form a diffuse field, in which
it is no longer possible to determine from which direction the sound is
coming. This noise is then varied in distances of a third and reproduced
alternately over the speakers and the headphones to be measured. A large
number of test persons then evaluate the difference in volume between
the room noise and the noise in the headphones.
The ideal state is when the volume impression
between the diffuse field and the headphones is the same. Diffuse-field
equalized headphones provide a clearly more spatial impression and make
it easier to determine whether sounds are coming from the front or rear.
Put simply, the sound events take place outside the head and are not
confined to the space between the ears.
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Manufacturer declarations
Warranty
Sennheiser electronic GmbH & Co. KG gives a
warranty of 24 months on this product.
For the current warranty conditions, please visit our website at
www.sennheiser.com or contact your Sennheiser partner.
FOR AUSTRALIA ONLY
Sennheiser goods come with guarantees that cannot be excluded under
the Australian Consumer Law. You are entitled to a replacement or
refund for a major failure and compensation for any other reasonably
foreseeable loss or damage. You are also entitled to have the goods
repaired or replaced if the goods fail to be of acceptable quality and the
failure does not amount to a major failure. This warranty is in addition to
other rights or remedies under law. Nothing in this warranty excludes,
limits, or modifies any liability of Sennheiser which is imposed by law,
or limits or modifies any remedy available to the consumer which is
granted by law.
To make a claim under this warranty, contact Sennheiser Australia Pty
Ltd, Unit 3, 31 Gibbes Street Chatswood NSW 2067, Australia; Phone:
(02) 9910 6700, email: service@sennheiser.com.au.
All expenses of claiming the warranty will be borne by the person
making the claim.
The Sennheiser International Warranty is provided by Sennheiser Australia Pty Ltd (ABN 68 165 388 312), Unit 3, 31 Gibbes Street Chatswood
NSW 2067 Australia.
HD 820 | English
In compliance with the following requirements
EU declaration of conformity
• RoHS Directive (2011/65/EU)
• EMC Directive (2014/30/EU)
The declaration is available at www.sennheiser.com/download.
Notes on disposal
• WEEE Directive (2012/19/EU)
The symbol of the crossed-out wheeled bin on the product,
the battery/rechargeable battery (if applicable) and/or the
packaging indicates that these products must not be disposed of with normal household waste, but must be disposed of separately
at the end of their operational lifetime. For packaging disposal, please
observe the legal regulations on waste segregation applicable in your
country.
Further information on the recycling of theses products can be obtained
from your municipal administration, from the municipal collection points,
or from your Sennheiser partner.
The separate collection of waste electrical and electronic equipment,
batteries/rechargeable batteries (if applicable) and packagings is used to
promote the reuse and recycling and to prevent negative effects caused
by e.g. potentially hazardous substances contained in these products.
Herewith you make an important contribution to the protection of the
environment and public health.
Trademarks
Sennheiser is a registered trade mark of
Sennheiser electronic GmbH & Co. KG.
Other product and company names mentioned in the user documentation
may be the trademarks or registered trademarks of their respective
holders.
declare the above device comply with the requirements of Federal Communications Commission.
This device complies with Part 15 of the FCC rules. Operation is subjected to the following two conditions:
1) This device may not cause harmful interference, and
2) This device must accept any interference received, including interference that may cause undesired operation.
Responsible Party: Michael Lieske
SD-U16L
Statements regarding FCC and Industry Canada
This device complies with Part 15 of the FCC rules and with RSS-210 of Industry Canada.
Operation is subject to the following two conditions: ( 1 ) this device may not cause harmful
interference, and ( 2 ) this device must accept any interference received, including interference that may cause undesired operation.
This class B digital equipment complies with the Canadian ICES-003.
Changes or modifications made to this equipment not expressly approved by Sennheiser
electronic Corp. may void the FCC authorization to operate this equipment.
Before putting the equipment into operation, please observe the respective country-specific
regulations!
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Page 11
Sennheiser electronic GmbH & Co. KG
Am Labor 1, 30900 Wedemark, Germany
www.sennheiser.com
Publ. 02/18, 576016/A01
Printed in Germany, Publ. 02/18, 576014/A01
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