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English | HD 820
Specifications
Frequency response 12 – 43,800 Hz (−3 dB)
6 – 48,000 Hz (−10 dB)
Transducer principle dynamic, closed-back
Ear coupling
circum-aural
Frequency
diffuse-field equalized
characteristic
Nominal impedance 300 Ω
Sound pressure level
103 dB (1 Vrms)
at 1 kHz
Long-term input
max. 500 mW as per EN 6 0268-7
power
THD
≤ 0.02 %
(1 kHz, 100 dB SPL)
Contact pressure
approx. 3.8 N ± 0.3 N
Weight
approx. 360 g (without
connection cable)
Maximum value of
10.5 mT
the static magnetic
field at the surface
Attenuation
up to 25 dB
Connector
XLR-4, balanced, 4-pin
(depending on con-
stereo jack plug:
nection cable, see
1/4" (6.35 mm), unbalanced,
pin assignment on
3-pin
inside cover page),
gold-plated
4.4 mm, balanced, 5-pin
Connection cables
silver-plated, oxygen-free
copper cable (OFC), balanced,
shielded, para-aramid rein-
forced, 3 m
Temperature range
operation: −10 °C to +55 °C
storage: −20 °C to +70 °C
Relative air humidity
operation: 10 to 80 %,
(non-condensing)
storage: 10 to 90 %
6
Manufacturer declarations
Warranty
Sonova Consumer Hearing GmbH gives a warranty of 24
months on this product.
For the current warranty conditions, please visit our
website at
www.sennheiser-hearing.com/warranty or contact your
Sonova Consumer Hearing partner.
For AUSTRALIA and NEW ZEALAND ONLY
Sonova Hearing Australia Pty Ltd provides a warranty of
24 months on these products.
For the current warranty conditions, visit the Sonova
Consumer Hearing website:
www.sennheiser-hearing.com/warranty.
Sonova Consumer Hearing goods come with guarantees
that cannot be excluded under Australian and New
Zealand 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 war-
ranty excludes, limits or modifies any remedy available to
the consumer which is granted by law.
To make a claim under this contract, raise a case via the
Sonova Consumer Hearing website: www.sennheiser-
hearing.com/service-support.
All expenses of claiming the warranty will be borne by the
person making the claim.
Sonova Consumer Hearing international warranty is
provided by: Sonova Hearing Australia Pty Ltd (ABN
82651492929) The Zenith, Level 14, Tower A, 821 Pacific
Highway, Chatswood New South Wales 2067, Australia.
In compliance with the following requirements
EU declaration of conformity
• RoHS Directive (2011/65/EU)
The declaration is available at
www.sennheiser-hearing.com/download.
UK declaration of conformity
• RoHS Regulations (2012)
Notes on disposal
• EU: WEEE Directive (2012/19/EU)
• UK: WEEE Regulations (2013)
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, observe the
legal regulations on waste segregation applicable in your country.
Improper disposal of packaging materials can harm your health and
the environment.
The separate collection of waste electrical and electronic equip-
ment, batteries/rechargeable batteries (if applicable) and
packagings is used to promote the reuse and recycling and to
prevent negative effects on your health and the environment, e.g.
caused by potentially hazardous substances contained in these
products. Recycle electrical and electronic equipment and bat-
teries/rechargeable batteries at the end of their operational lifetime
in order to make contained recyclable materials usable and to avoid
littering the environment.
If batteries/rechargeable batteries can be removed without dam-
aging them, you are obliged to dispose of them separately (for the
safe removal of batteries/rechargeable batteries, see the instruction
manual of the product). Handle lithium-containing batteries/re-
chargeable batteries with special care, as they pose particular risks,
such as the risk of fire and/or the risk of ingestion in the case of coin
batteries. Reduce the generation of battery waste as much as pos-
sible by using longer-life batteries or rechargeable batteries.
Further information on the recycling of these products can be
obtained from your municipal administration, from the municipal
collection points, or from your Sonova Consumer Hearing partner.
You can also return electrical or electronic equipment to distributors
who have a take-back obligation. Herewith you make an important
contribution to the protection of the environment and public health.
