Operation Manual

For internal and reseller distribution only – Bose confidential.
CC013997 QC25 FAQ 5.6.14
12
Bose
®
QuietComfort
®
25
Acoustic Noise Cancelling
®
headphones
PRODUCT DIFFERENTIATION
Are the QuietComfort
®
25 Acoustic Noise
Cancelling
®
headphones subject to
electromagnetic interference (EMI)?
Certain wireless electrical devices, such as mobile phones and wireless
computer networks, may cause some static interference with audio
products. The interference depends on the specific device and the
distance from the audio product.
The EMI shielding of the QuietComfort 25 headphones includes circuitry
designed to minimize the potential for interference from wireless Internet
networks or mobile phones. They have been tested and conform to all
electromagnetic emission levels, safety and other directives/specifications
presently required by the Council of European Communities (CE).
How are the enhanced QuietComfort
headphones different from the earlier
versions of QuietComfort headphones?
The original QuietComfort headphones were introduced in 2000. In 2003,
Bose Corporation introduced the champagne-colored QuietComfort 2
headphones, which included:
 A single, detachable audio cable.
 Fold-flat storage.
 Elimination of the inline control box.
 Reduction of noise floor/electronic hiss.
 Improved audio performance.
In 2005, Bose updated the QuietComfort 2 headphones with new silver-
and-chrome styling and improved audio performance. The headband
also was redesigned for greater durability, and increased shielding of
electromagnetic interference (EMI) was added.
In 2006, Bose introduced the QuietComfort 3 headphones, a smaller, on-
ear version of our acclaimed QuietComfort 2 headphones. These offer
similar overall performance, with the convenience of a smaller form factor
and a rechargeable lithium-ion battery.
In 2009, Bose QuietComfort 15 headphones were introduced, with a
significant improvement in noise reduction performance, with no
compromise in audio performance or comfortable fit. In 2011, we
included an additional audio attenuator cable with inline microphone
and remote for convenient control of select iPod, iPhone and iPad
models.
The Bose QuietComfort 25 headphones feature a new look from previous
QuietComfort headphones. They maintain the comfort of the previous
generation while improving audio and noise reduction performance. A
pivot was added to allow for a significant reduction in the size of the
headphone while stored in its case.