SENNHEISER HD 660S High-Definition Open-Back Headphones

Important safety instructions
- 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 to 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 another implant.
- Keep the product, accessories and packaging parts out of reach of children and pets to prevent accidents. Swallowing and choking hazard.
- Do not use the product in an environment that requires your special attention (e.g. in traffic). 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.
- Use only attachments/accessories/spare parts supplied or recommended by Sennheiser.
- Clean the product only with a soft, dry cloth. Intended use/Liability These open, 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 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.
Use



Package contents
- 1 HD 660S open, dynamic headphones
- 1 connection cable with 1/4″ (6.35 mm) stereo
- jack plug (connected ex-works), unbalanced
- 1 connection cable with 4.4 mm stereo jack
- plug, balanced
- 1 stereo jack adapter
- (1/4″ (6.35 mm) to 3.5 mm)
- 1 instruction manual
- 1 storage box
Your HD 660S
The HD 660S retains all the virtues of its legendary predecessor, the HD 650, but also represents a decisive step forward technology-wise. Thanks to advanced simulation possibilities, our engineers were able to further optimize the magnet system and the shape of the diaphragm. The new transducers are meticulously measured for each headphone and are hand-selected in pairs. In terms of sound, the HD 660S sets a new benchmark in its class and masters the balancing between perfect control and fascinating musicality in a playful way. With powerful bass, seductive timbres and breathtaking clarity, the HD 660S lets you experience the pure joy of music. The Sennheiser HD 660S will inspire you.
Connecting the headphones
- Select the suitable connection cable and, if necessary, an adapter for your audio source to which you want to connect the headphones, and change the connection cable as described in section C:
- 1/4″ (6.35 mm) stereo jack plug, unbalanced (can also be connected to a 3.5 mm stereo jack socket by using the supplied adapter)
- 4.4 mm stereo jack plug, balanced
- XLR-4, balanced (Sennheiser CH 650 S, optional accessory)
- Connect the headphones to your audio source. B 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.
- For optimum sound quality, ensure that the ear cups are not covered. C Changing the connection cable*
- Make sure the “R” (right) and “L” (left) markings on the connectors match the markings on the ear cups. The marking on the connectors must point
- outward.
- Insert the connector until it locks into place with an audible click.
Replacing the ear pads
For reasons of hygiene, you should replace the ear pads 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
- Grasp behind the ear pads and pull them up and away from the ear cups.
- Place the new earpads onto the ear cups and attach the earpads by pressing firmly around them. The headband padding can be replaced by the Sennheiser repair service. Please contact your Sennheiser partner.
Cleaning and storing the headphones* - Clean the product only with a dry and soft cloth.
- Store the product in a clean, dust-free place, e.g. in its storage box.
Specifications

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’s 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 the 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 Technical Services and Spare Parts Sales, c/o Linfox, Gate 3, 1 Fox Lane, Erskine Park, 2759, NSWAustralia, phone: +61 2 9910 6700 email: [email protected] All expenses of claiming the warranty will be borne by the person making theclaim. The Sennheiser International Warranty is provided by Sennheiser Australia Pty Ltd (ABN 68 165 388 312), The Zenith, Tower A, L14, 821 Pacific Highway Chatswood NSW 2067, Australia.



















