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3
HD 820 | English
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.
▷
Do not place the storage box on delicate surfaces; if necessary, use
a non-slip pad under the storage box. Varnish or furniture polish may
degrade the feet of the storage box, which could stain your furniture.
▷
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.
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 stereo jack plug, balanced
• USB flash drive (SD-U16L version) with instruction manual (as PDF file)
and individually measured diffuse-field frequency response curve
• Instruction manual
• Storage box
• Microfiber cloth
ENJAFRESPTNLITDASVFIELPLTRRUZHTWKOIDEELVLTCSSKHUROBGSLHR DE
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