The excellent product, with amazing built in quality. Based on my experience I will suggest this phone whom is looking more for the music quality then for noice reduction as music is superb but cancelation is not as great as in BOSE QuietComfort 3.

The way to go with sound sealing noise cancellation headphones...if you can afford them.

Comfortable; great sound; superior noise cancellation

Expensive; poor packaging (check your pair first before opening

This latest headphone by Sennheiser, the PXC 450, costs around $300, and this is the latest in technology. It acts as your normalheadphone, but with extra features. First of all, this headphone runs on a AAA battery, and that is like 20 hours of mind boggling music runs wild.

Bought these headphone because i have heard them before and also liked the fact that they are noise canceling. The noise canceling works really well on low frequency sounds like plane engines and car noise.

Can be used without batteries when they run out; Great sound quality in bypass mode; Great at noise canceling; Build quality is amazing; Ear cups are SOOO Soft; Detachable Cable

Not to blown away by the look of them; but some people like them

I bought a set of these used. What a great deal! The Audio quality is so good I began using them on my stero system to listen to analog recordings. I replace a set of Beyr Dynamic headphones. These are more comfortable. If you need the noise canceling capability, it also work superb.

I got these specifically to filter out office noise listening to streams through my computer, as I'm a programmer in a farm of 6x6 cubes (about 25) with a lot of distracting noise. They accomplish that task well, and I am very happy with the sound quality.

Comfortable; Convenient; Easy to use; Good Bass; Great Sound

These teutonic ear-coccoons will provide you with the long-haul comfort you so crave from a set of headphones. But can Sennheiser supply the audio excellence to complement the aural massage that the PXC 450s give you?

These noise-cancellers from German can-meisters Sennheiser quell background sound, from jumbo jets to buses, more effectively the any other headphones; The design is endlessly comfortable, even if it does make you look dorkish in the extreme, and it runs on a single AAA, so you don't need to worry...

Reviewing audio gear is a very subjective thing, but there is perhaps something a bit I too I pristine about the PXC 450′s sound; It's a little like being serenaded by the Pod people from Invasion of the Bodysnatchers – uncannily accurate but lacking in warmth.

Sennheiser as a company, has been around for years, and is definitely not a novice in making high-end headphones. If there are a pair of headphones you can compare the PXC-450 with then it would be Bose's QuietComfort 3. However, the PXC-450 outruns the QC3 with its features.

After the first few hours, these Sennheisers more than justify the high price. Excellent!

Awesome noise-cancelling technology; Usual superb Sennheiser sonic performance

Expensive; Low-end grunt is slightly lacking

Thank you for searching out Australian HI-FI Magazine's equipment review of the Sennheiser PXC 450 Headphones originally published in Australian Hi-Fi Magazine, July/August 2008 (Volume 39 Number 4).