I've had my Sennheiser PXC 300 noise reduction headphones for a couple of weeks now so it's time for a mini review.
As can be seen in the photo the headphones fold up pretty small. A very snug fitting case is provided which protects the headphones while they are in your bag.
So as to save space, there is a separate housing unit for two AAA batteries and, presumably, the 'NoiseGard Advance' circuitry. Although a little bulky, it does come with a useful belt clip. One annoying thing to point out is that you cannot disconnect the headphones from this unit.
Also provided are two adapters that enable you to connect the headphones to an airplane seat sockets and home audio systems.
Sound Quality
I'd say these headphones have better quality sound than my Sony Fontopia ear-phones, particularly for vocals. You'd expect superior sound for £80, but surprisingly the bass is lacking - or do Fontopias over-emphasize bass?
NoiseGard
Before buying these headphones I had read a comment on Amazon which said that reviewer could hear everything on the Tube - people chatting, announcements and even music coming from other people's headphones.
I have to say that the reviewer was spot on. 'Deep-noise reduction' is probably a better description rather than 'noise-cancellation', but to be fair the noise cancellation effect is explained fairly accurately on the box.
With NoiseGard enabled you can hear most things around you except low rumbling sounds. Switch off the noise reduction on the train and you'll suddenly hear a loud deep grumbling sound. This means that while lots of the train's noise will be cut out other sounds, such as talking will not.
Another thing I should mention is that you don't need to turn up the volume so high when the noise cancellation is on. As well as low pitched noise being cut down, the battery unit amplifies the sound somewhat.
These headphones would definately work well on an airplane, especially if you are near the wing in economy like I always seem to be. But as for higher pitched sounds, these will not help.
In summary I'd say these headphones are pretty good, just don't expect a world of silence.
> Amazon - Sennheiser PXC 300 noise reduction headphones