Bose Headphones QuietComfort 3 User Guide page Page 1 Thursday, March 16, 2006 5:14 PM  
Bose® QuietComfort® 3  
Acoustic Noise Cancelling®  
Owner’s Guide  
Guia de usario  
Notice d’utilitsation  
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Safety Information  
Safety Information  
Please read this owner’s guide  
Please take the time to follow the instructions in this owner’s guide carefully. It will  
help you to properly use your new Bose® product and enjoy its features. Please save  
this owner’s guide for future reference.  
To reduce the risk of fire or electric shock, do not expose the battery charger to rain or moisture. Do not expose the  
charger to dripping or splashing of liquids.  
The battery charger must be used indoors. It is neither designed nor tested for use outdoors, in recreation vehicles,  
or on boats.  
Charge the battery only on a charger approved by Bose Corporation. Do not continue charging the battery if it does  
not reach full charge within the specified charging time. Doing so may cause the battery to become hot, rupture, or  
ignite. If you see any heat deformation or leakage, properly dispose of the battery.  
Do not expose the battery to temperatures greater than 212°F (100°C). If exposed to excessive heat, the battery  
can catch fire and explode.  
Do not place the battery in direct sunlight, or use or store it inside cars in hot weather where it can be exposed to  
temperatures in excess of 140°F (60°C). Doing so may cause the battery to generate heat, rupture, or ignite. Using  
the battery in this manner also may result in a loss of performance and a shortened life expectancy.  
Do not short circuit the battery. Avoid placing it around metal objects such as keys, pocket change, paper clips, and  
Do not hit the battery with a hammer, step on, throw or drop it to expose it to a strong shock. Do not pierce the bat-  
tery with a sharp object such as a nail. Do not crush, dent, or deform the battery in any way. If the battery becomes  
deformed, properly dispose of it.  
The battery used in this device may present a risk of fire or chemical burn if mistreated. Do not disassemble, heat  
above 212°F (100°C), or incinerate. Replace battery with Bose part PC40229 only. Use of another battery may  
present a risk of fire or explosion.  
Do not allow the battery to get wet. Avoid using it in high humidity environments.  
Avoid electrostatic discharge to the battery.  
Do not drop or sit on the headphones, or allow them to be immersed in water.  
Long-term exposure to loud music may cause hearing damage. It is best to avoid extreme volume when using these  
headphones, especially for extended periods.  
Do not use these headphones when operating a motor vehicle on a public road, or where the inability to hear out-  
side sounds may present a danger to you or others.  
Sounds that you rely on as reminders or warnings may have an unfamiliar character when you are using the head-  
phones. Be aware of how these sounds vary in character, so you can recognize them as needed.  
Please dispose of used or damaged batteries promptly and properly,  
following any local regulations. Keep away from children. Do not incinerate.  
To return batteries for recycling, contact Bose or your Bose dealer. In the United  
States only, call 1-800-905-2180. For other regions, see the contact information  
on the inside back cover.  
This product conforms to the EMC Directive 89/336/EEC and to the Low  
Voltage Directive 73/23/EEC. The complete Declaration of Conformity can be  
©2006 Bose Corporation. No part of this work may be reproduced, modified, distributed, or  
otherwise used without prior written permission.  
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Important Safety Instructions  
Important Safety Instructions  
1. Read these instructions – for all components before using this product.  
2. Keep these instructions – for future reference.  
3. Heed all warnings – on the product and in the owner’s guide.  
4. Follow all instructions.  
5. Do not use this product near water or moisture – Do not use this product near a bathtub, washbowl, kitchen  
sink, laundry tub, in a wet basement, near a swimming pool, or anywhere else that water or moisture are present.  
6. Clean only with a dry cloth – and as directed by Bose Corporation. Unplug the battery charger from the wall out-  
let before cleaning.  
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.  
8. Do not install near any heat sources, such as radiators, heat registers, stoves, or other apparatus (includ-  
ing amplifiers) that produce heat.  
9. Only use attachments/accessories specified by Bose.  
10. Unplug the battery charger during lightning storms or when unused for long periods of time – to prevent  
damage to this product.  
11. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been dam-  
aged in any way: such as power-supply cord or plug is damaged; liquid has been spilled or objects have  
fallen into the apparatus; the apparatus has been exposed to rain or moisture, does not operate normally,  
or has been dropped – Do not attempt to service this product yourself. Opening or removing covers may expose  
you to dangerous voltages or other hazards. Please call Bose to be referred to an authorized service center near  
Compliance with FCC rules (U.S.A., only)  
This device complies with Part 15 of the FCC rules. 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 equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part  
15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a  
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not  
installed and used in accordance with the instructions, may cause harmful interference to radio communications.  
However, this is no guarantee that interference will not occur in a particular installation. If this equipment does  
cause harmful interference to radio or television reception, which can be determined by turning the equipment off  
and on, you are encouraged to try to correct the interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment to an outlet on a different circuit than the one to which the receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s  
authority to operate this equipment.  
Proper connections must be used for connection to a host computer and/or peripherals in order to meet FCC  
emission limits.  
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Introducing the QuietComfort® 3 Acoustic Noise  
Cancelling® headphones  
Thank you for purchasing the QuietComfort® 3 Acoustic Noise Cancelling®  
headphones from Bose. Our innovative technologies enable these on-ear  
headphones to reduce unwanted distractions while providing you with lifelike audio  
performance and a comfortable fit.  
L (left)  
Replaceable ear  
R (right)  
Power switch  
with power indicator  
Accessories included:  
¼ in. (6.3 mm)  
stereo phone  
plug adapter  
Headphones audio cord  
5 ft. (1.5 m) audio  
extension cord  
Carrying case  
IMPORTANT: Before initial headphone use, it is important to fully charge the  
battery for a minimum of two hours. See “Charging the battery” on page 5.  
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Preparing Your Headphones  
Preparing Your Headphones  
Charging the battery  
Initial charging time for a new battery is approximately two hours. After that, charging  
time varies depending on the battery charge state.  
1. Insert the battery into the charger.  
2. Swing the plug prongs out of the charger body.  
3. Plug the charger into a live AC (mains) outlet.  
On = Charging  
Off = Charging complete  
Flashing = See “Troubleshooting”  
on page 10.  
• After charging, unplug the battery charger and remove the battery.  
• Storing a battery in the charger diminishes the charged state of the bat-  
tery over time and may permanently reduce the capacity of the battery.  
Battery handling and precautions  
• The battery does not have to be completely discharged in order to charge it. You  
can charge the battery at any time.  
• Never leave the battery in a discharged state. Charge after use and before storage.  
• Avoid extreme temperatures when charging the battery. Battery charging should  
occur within the temperature range of 32°F (0°C) to 95°F (35°C).  
• A fully charged battery provides approximately 20 hours of use. Replace the battery  
when it no longer provides adequate power after charging. To order a replacement  
battery, see “Troubleshooting” on page 10.  
• Keep the terminals on the battery, in the charger, and in the right earcup of the  
headphones clean at all times. Dirty terminals may cause poor electrical connec-  
tions and affect performance. For cleaning instructions, see “Cleaning” on page 10.  
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