These Sennheisers have been our Award-winning cans for two years on the bounce, but they've now been beaten by the Bose QuietComfort 15 s, which sound better and are more adept at noise-cancelling. But the PXC-450s remain a great buy.

Sound far better than most rivals; snug; comfortable fit; effective

Not cheap

Overall a very good product well made and attractive, very comfortable to wear for extended periods of time, sounds excellent and the noise cancelation works really well, also like the talk through function which I surprisingly used a lot, had it on a recent 4 hour plane trip with screaming kids...

The Sennheiser PXC 450s (MSRP $449.95) are an all-around, decent set of active noise-cancelers that don't sacrifice much performance in order to block out unwanted noise-and that's rarer than you'd think.

let's get something out of the way immediately. the new sennheiser pxc 450 noisegard headphones are excellent, but they are too expensive- way too expensive. that's why they narrowly missed our editors' choice award. even so, bose's quietcomfort headphone series has finally met a worthy competitor.

Excellent noise cancellation; Comfortable fit; Deep low end; Great audio performance; Passive mode for music listening only

Very expensive; Quite large; Volume controls hard to use when in place

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.

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

Fantastic headphones with the best noise cancelling we've heard, but at a price. Audio quality is superb and the build quality will withstand the strains of constant use.

Sound quality; Noise-cancellation; Fold-flat design; Included hard case; TalkThrough feature

Price; Dance fans may want more bass; Noise-cancelling bypass switch instead of automatic cut-out

With $799 you can buy a lot of things. It can get you 2663 soft serve MacDonald's ice cream cones for example, or 53 movie tickets. It also happens to be the price tag for Sennheiser's latest and greatest pair of noise-cancelling headphones, the PXC450.

Great clarity; crisp sound; nice mid and treble ranges; great noise cancelling

Bass is a little weak; expensive

These were unavailable from NCIX when I ordered them, so I actually got them from another source, but thought I'd write a quick review anyway. I buy Sennheiser headphones exclusively because I've never been let down by their sound and build quality. These headphones were worth every penny.

- sound quality; - noise cancelling; - comfortable for long periods of time; - don't have to listen to screaming neighbour kids anymore; - sennheiser

- nothing

It breaks our heart to think of all the engineering Sennheiser did on the talk-through button on the over-the-head PXC-450s, because it works pretty well. You're just never going to use it.