![](/html/39/3917/3917b52429993608356f82220f244e490e669f6067ee0005aa4988f01159590c/bg3.png)
Contents
Contents
Important safety information .................................................................................. 2
Package contents ....................................................................................................... 3
Product overview .......................................................................................................4
Connecting the HDA 300 to an audiometer and calibrating the audiometer ... 5
Storing the HDA 300 ..................................................................................................5
Using the HDA 300 .....................................................................................................6
Cleaning and maintaining the HDA 300 ................................................................. 7
Replacing the ear pads ...............................................................................................8
Replacing the headband paddings ..........................................................................8
Replacing the diaphragm cover ...............................................................................9
Specifications ............................................................................................................ 10
Manufacturer declarations .....................................................................................10
HDA 300
| 1
![](/html/39/3917/3917b52429993608356f82220f244e490e669f6067ee0005aa4988f01159590c/bg4.png)
Important safety information
Important safety information
왘 Read this instruction manual carefully and completely before using the
product.
왘 Always include this instruction manual when passing the product on to third
parties.
왘 Do not use an obviously defective product.
Preventing damage to health and accidents
왘 For reasons of hygiene, never use the headphones on broken skin.
왘 Reduce the volume before using the headphones. To prevent hearing damage,
avoid listening to music at high volumes over a longer period of time.
왘 Always maintain a distance of at least 3.94" (10 cm) between the ear caps and
the cardiac pacemaker or implanted defibrillator since the product generates
permanent magnetic fields.
왘 Keep the product, accessories and packaging parts out of reach of children and
pets to prevent accidents and choking hazards.
Preventing damage to the product and malfunctions
왘 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.
왘 Reduce the volume before using the headphones.
왘 To prevent hearing damage, avoid listening to music at high volumes over a
longer period of time
왘 Only use attachments/accessories/spare parts supplied or recommended by
Sennheiser.
왘 Only clean the product with a soft, dry cloth. The headband paddings and
the
ear pads can be cleaned with disinfectants recommended by Sennheiser
(see page
7).
Intended use/Liability
The HDA 300 is a pair of closed, dynamic headphones designed for use with
audiometers. The headphones are also suitable for high frequency audiometry.
This product can be used for commercial purposes.
It is considered improper use when this product is used for any application not
named in this instruction manual.
Sennheiser does not accept liability for damage arising from abuse or misuse of
this product and its attachments/accessories.
2 | HDA 300
![](/html/39/3917/3917b52429993608356f82220f244e490e669f6067ee0005aa4988f01159590c/bg5.png)
Package contents
Package contents
HDA 300 headphones
HZH 350 hygiene pads
Instruction manual
A list of accessories can be found on the HDA 300 product page at
www.sennheiser.com. For information on suppliers, contact your local
Sennheiser partner: www.sennheiser.com > “Service & Support“.
Some of the available accessories:
• HZH 350 hygiene pads
•Ear pads for the HDA 300
• Diaphragm covers for the HDA 300
• Open-ended connection cable for the HDA 300
• XL headband paddings for small head sizes
HDA 300 | 3