The PXC450's give very open transparent mids and highs, with deep detailed bass. Smooth sounding. These are the best sounding noise cancelling headphones I've heard. The Bose Quiet Comfort Series sounds very muffled in mids and highs in contrast with the Sennheiser PXC450's and pale in comparison.

Good quality authentic sound headphones with reasonable noise cancelling, but buy rechargeable batteries and a charger.

When everything else is going right, they have great clarity of sound; Pretty good at noise cancelling without distorting the sound; Clear authentic sound is what I was looking for so they are quite good for what I needed

Very battery dependent and they go through batteries very quickly and won't work if the battery is a little low either; I'm having trouble with volume too which I believe is an impedance issue, so be sure to match your equipment

Very comfortable, and the noise cancellation is superb. No distortion even at very high volume. Worth every cent.

Crutchfield has collected 30 user reviews for this product with an average rating of 4.6 out of 5 stars. The most recent reviewer said, "I bought these after a long struggle to choose between the Sennheisers and the Bose Quiet Comforts. I chose these based on reviews of comfort and overall sound.

I have used many NC headphones before (Bose QC, AKG, AT), but these are the most comfortable, best sounding ones yet. A bit big, but it works perfect for my ears.

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

My previous headset was a Bose QC 2 and wanted to try a full ear cover noise canceling headset. The Sennheiser PXC 450 received enough good reviews for me to give them a try. Upon receiving them, the first thing that I noticed was a persistent low frequency rumble.

Volume controls; pause control; sound quality

Persistent low frequency rumble; P..; poor customer service from Sennheiser

I don't have much experience with noise canceling headphones, but after quite a bit of research I settled on these (it came down to Bose and Sennheiser). For a casual listener, these are amazing headphones.

Comfortable; Great Sound

I purchased these to replace an old pair of Sennheiser NR phones I've had for about 15 years. While I liked my old ones these are far better both in design and operation. The battery is internal, the ear cups swivel 90 degrees for storage, they come with a case (a very nice case) and the cord is...

I use it for 2 years, and I'm not tired. Even if it does not offer perhaps the best "noise cancellation" of the market, it outperforms the competition in several ways. In particular, a remarkable musicality (this is a real headphone "audiophile" Sennheiser): no special coloring of the sound, not...