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Bose

QuietComfort

Acoustic Noise Cancelling

Are the QuietComfort

25 Acoustic Noise

Cancelling

headphones subject to

electromagnetic interference (EMI)?

PRODUCT DIFFERENTIATION

How are the enhanced QuietComfort

headphones different from the earlier

versions of QuietComfort headphones?

For internal and reseller distribution only – Bose confidential

headphones

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).

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.

CC013997 QC25 FAQ 5.6.14