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CC013997 QC25 FAQ 5.6.14

Bose

QuietComfort

Acoustic Noise Cancelling

headphones

Do the QuietComfort 25 Acoustic Noise

Cancelling headphones reduce more

noise than the original QuietComfort

headphones?

Yes. Earlier versions of QuietComfort headphones all provided essentially

the same level of noise reduction. The QuietComfort 15 headphones

improved active noise cancelling and passive attenuation for a significant

improvement in the amount of noise reduction. The QuietComfort 25

headphones make improvements to the total noise reduction mainly at

low frequencies.

Do the enhanced QuietComfort 25

Acoustic Noise Cancelling headphones

deliver better audio reproduction than

the earlier versions of QuietComfort

headphones?

Since their introduction in 2000, the audio performance of the

QuietComfort headphones has been periodically improved for more

lifelike audio reproduction. The champagne-colored QuietComfort 2

headphones, introduced in 2003, dramatically reduced the electronic

hiss/noise floor of the original version. The silver-and-chrome QuietComfort

2 headphones, introduced in 2005, included a subtle refinement that

affects the full audio spectrum, with the most noticeable improvement in

the higher-frequency range. The QuietComfort 15 headphones

maintained this acclaimed audio performance, while the noise reduction

was significantly improved. The QuietComfort 25 headphones continue to

improve the audio performance with a smoother and more balanced

audio response.

Do the QuietComfort 25 Acoustic Noise

Cancelling headphones deliver better

audio reproduction than Bose

audio

headphones?

Yes. Although all of our consumer headphones utilize TriPort

acoustic

headphone structure – which enables a bass response not commonly

found in headphones – QuietComfort 25 headphones utilize Active EQ to

closely match the Bose target curve for headphone audio. In addition,

the noise reduction technology allows you to enjoy your music with less

distraction from noise around you; you can hear more without having to

turn up the volume.

I am a pilot; can I use the QuietComfort

25 Acoustic Noise Cancelling

headphones to fly?

No. These headphones do not include features that would be required to

meet the needs of pilots, nor do they meet FAA standards for aviation

communication. The Bose A20

Aviation Headset is designed exclusively

to meet these needs. For further information on the A20

Aviation

Headset, contact Bose Corporation at 1-800-444-BOSE.

Are the QuietComfort

25 Acoustic Noise

Cancelling

headphones appropriate for

industrial use as a hearing-protection

device?

No. The QuietComfort 25 headphones were not designed for use in

industrial situations requiring hearing protection. Tests that should be

performed on such a product, such as making sure the product is not

damaged by chemicals or solvents, have not been done. The audio

cable could become tangled in machinery, posing a safety hazard.

Finally, the noise reduction rating (NRR) as defined by the government

cannot be measured for this product because the test method specified

by law is generally recognized to be inaccurate when applied to active

devices.

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