Bose QuietComfort 2 Acoustic Noise Cancelling headphones Sold from May 2003 to 2010 User Manual

							 
The Bose 
®
 
 QuietComfort 
®
 
  
2 
  
Acoustic Noise Cancelling 
®
 
  
Headphones  
						

							 
2  
Batteries 
Please dispose of used batteries properly, 
following any local regulations. Do not incinerate. 
©2003 Bose Corporation. No part of this work may be reproduced, modified, distributed, or 
otherwise used without prior written permission. 
Batteries 
DECLARATION OF CONFORMITY 
We, the offerer:
Bose Corporation, The Mountain, Framingham, MA 
01701-9168  USA
acknowledge our sole responsibility, 
that the product:
   Kind of equipment: Headphones
   Type designation:   QuietComfort 
®
 
 2 
  Acoustic Noise Cancelling 
®
 
 
  Headphones
   Model number:       QC-2 
In accordance with EMC Directive 89/336/EEC 
and Article 10(1) of the Directive, 
is in compliance with the following 
norm(s) or document(s)
   Technical regulations: EN55013, EN55020
Accredited by:
Bose Corporation, The Mountain, Framingham, MA  
01701-9168  USA
24 February 2003 Nic Merks 
Bose Products B.V. Vice President Europe
Nijverheidstraat 8, 1135 GE Edam Manufacturer’s authorized
The Netherlands  
    
EU represnetative 
						

							 
                                                                                        3 
QuietComfort 
®
 
 2 Acoustic Noise 
Cancelling 
®
 
 headphones  
Thank you for purchasing the QuietComfort 2 Acoustic 
Noise Cancelling headphones from Bose. Advanced 
research and development, innovative engineering, and 
integrated technologies enable the headphones to reduce 
unwanted noise and provide you with exceptional acoustic 
performance in a comfortable, convenient package.
Insert the battery first, before you put on the headphones. 
Wearing the headphones 
As you put on the headphones, observe the markings that 
identify the left (L) and right (R) earcups. Adjust the 
headband so it rests gently on top of your head and the 
earcup cushions fit comfortably around your ears. 
  
About Your Headphones 
Battery light 
indicatorAdjustable 
headband
Battery 
compartmentRotating 
earcups 
1
 
/ 
4
 
 (6.3 mm)
Stereo phone adapterDual 
plug adapter 
1
 
/ 
8
 
 (3.5 mm)
Headphone plug Audio 
attenuatorExtension 
cord L mark
R mark
Replaceable 
earcup cushionsPorts Power
switch
Battery
R
 
+
– 
						

							 
                                                                                        4 
Using your headphones 
If you plan to use them for noise reduction only, simply put 
on the headphones and turn on the power switch, located 
on the right earcup. There are no cable connections 
required for this use.
To use the headphones for audio, first notice the settings on 
the audio attenuator shown below. 
These Hi and Lo settings are used to adjust the output 
volume of different audio sources. “Lo” is typically used for 
airline audio or audio devices that use A/C power. “Hi” is 
typically used for battery-powered audio devices. 
   
Note: 
  
Hi and Lo settings have no effect on noise 
reduction. 
Select the appropriate setting for the sound source you will 
use. Then insert the audio attenuator into the opening on 
the left (L) earcup and press it in so it is flush with the side 
of the earcup. 
As soon as you connect the headphone plug to your audio 
source, you are ready to put on the headphones and turn 
on the power switch to enjoy both audio and noise 
reduction. Use the volume control on the selected audio 
source to make additional volume adjustments.  
  
Use 
Hi/Lo
switch L
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5 
Connecting to an audio source 
You can use the headphones with a variety of audio 
sources: airline audio, a CD, DVD or MP3 player, a per-
sonal or laptop computer, or home stereo. The maximum 
input voltage is 9 Vrms.
To make the connection, insert the headphone plug into 
the jack on the audio source you will use. 
Notice the jack configurations on the left in the chart below. 
Instructions on the right tell you how to connect to each 
type of jack:
A single, 3.5 mm jack (on most portable 
sources) – use the single plug. No adapter needed.
Two 3.5 mm jacks – use the dual plug adapter. 
One 3.5 mm jack and one power jack – use the 
single plug in the 3.5 mm jack (the larger one). 
The smaller jack does not need a connection.
One power jack and two 3.5 mm jacks – use 
the dual plug adapter for the two 3.5 mm 
jacks. The power jack does not need a connection.
One 6.3 mm jack (for home stereos) – use the 
6.3 mm stereo phone adapter. 
Note:  
A 
udio jack configurations on airplanes vary. Also, 
airline audio may not equal the high quality audio you can 
get from a home stereo or a portable source. 
Use
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                                                                                        6 
Folding the earcups for storage 
QuietComfort 
®
 
 2 Acoustic Noise Cancelling 
®
 
 headphones 
feature rotating earcups that fold flat for easy, convenient 
storage. They rotate in one direction only. 
Note: 
  
Incorrectly rotating the earcups can damage the 
headphones. 
Reattaching earcup cushions 
  
The earcup cushions are held in place by a mounting 
flange. This flange snaps under small tabs located 
around the inside rim of the earcup.
If an earcup cushion becomes partially or completely 
detached, push its mounting flange back into the earcup. 
Then use your finger or thumb to press around the edge of 
the mounting flange, making sure it snaps into place all the 
way around the earcup.
RL
 
Care
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7 
Battery replacement 
Although it varies by usage, battery life averages 35 hours. 
With the headphones turned on, the battery light indicator 
will flash when there are approximately 5 hours of battery 
life remaining.
When a replacement is needed, use 1 AAA alkaline battery
(IEC LR03). Tilt the top of the right earcup inward to gain 
access to the battery compartment.  
Note:  
You can use rechargeable batteries (NiMH, com-
posed of nickel metal hydride, are recommended). They 
average half the life of alkaline batteries. However, the low 
battery indicator light is not set for such batteries and will 
not be a reliable indicator of their remaining battery life.  
Replacement parts and accessories 
  
You can order parts and accessories, as listed below, by 
contacting Bose 
®
 
 Customer Service. See the phone 
number for your area on the inside back cover of this guide.  
Care
R
+
–
 
•Deluxe carry case
•Replacement ear cushion kit
•1.5 m extension cord
•6.2 m extension cord
•Audio attenuator •Dual plug adapter
• Accessory kit
(includes adapters,
extension cord,
2 AAA batteries)
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                                                                                        8 
Cleaning the headphones 
Scheduled cleaning is not required. However, you can 
simply wipe the outside surfaces with a damp cloth, as 
needed. Also, be sure that the earcup ports are clear and 
that no moisture is allowed into the earcups.
Troubleshooting
  Problem Possible Cause Solution
• Noise reduction                           
   absent  
• Low or no 
   volume   
  
  
• Crackling noise;   
   intermittent loss 
   of noise reduction
• Low rumbling   
Reference
No power
to headphone
Audio source
setting
Audio attenuator
connection
Low battery
Poor earcup fit
Ports blockedTurn unit on;
check battery
Turn source
volume up or set
audio attenuator
on “Hi”
Check connection
at source and
insertion into
the earcup
Replace
battery
Adjust fit on ears
Clear ports
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							9
Other needs
These headphones are not engineered to meet the 
needs of pilots or to meet civil aviation authority 
standards for aviation communications.  
For that purpose, Bose offers the Aviation Headset    , 
which features a microphone with the appropriate power 
and intelligibility for transmission of flight information. It is 
engineered to withstand the altitude and temperature 
conditions common in non-commercial aircraft.
For information on the Bose
® Aviation Headset    , 
contact Bose Corporation by calling 1-508-766-1099 
or +31(0)299-390777.
Cautions
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 
outside sounds may present a danger to the user or 
others. 
Sounds that you rely on as reminders or warnings may 
have an unfamiliar character when you are using the 
headphones. Be aware of how these sounds vary in 
character, so you can recognize them as needed.
Do not drop, sit on, or allow the headphones to be 
immersed in water.
Reference 
						

							                                                                                         
©2003 Bose Corporation, 
The Mountain, Framingham, MA 
01701-9168 USA 
PN257565 AM Rev.00 JN30819
Europe
Phone: 0299 390111
Fax: 0299 390114
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www.bose.de
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Fax: 01-30614105
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AM257565_00 _V.pdf   May 13, 2003