Excerpt: the sennhieser mm450x has a very clean and clear voice of song details but you feel at a moment that you need more volume while you reialize that this is the maximum. .. anyway if you think about it from health point of view.. the very loaud headphones might heart your ears .. so what you get from those headphones may satisfy your needs unless you are a rock fan.
Pros: Attractive Design, Bluetooth, Durable, Easy To Assemble
Excerpt: Great sound and easy on the ears. Furthermore, great on a plane with screeming kids, noise canceling works as stated. ActivX is a plus. Rather pricey and a little finger practice with the controls.
Summary: For the amount of money spent, I would have expected two more things: better quality bass which does not distort at high volume levels, and a better quality noise cancelling feature. The noise cancelling is great! It also boosts the bass levels. I found these BETTER than the RS160, RS170, RS180!! There is a background noise which is very evident in the other 3 I mention. Kleer technology (with Sennheiser?) is not as great as it's been marketed.
Summary: I don't mind these headphones but there are a few things that need improvement. Positives include: - compact enough to carry around in the laptop bag. Negatives include: - I have a large head and they do hurt my ears after awhile - battery life isn't great (couple of hours, if that) when doing Bluetooth and noise cancellation. - requires a proprietary battery - built in microphone sort-of works. It would be better to have a set that has a boom mike.
Summary: Love them. Had a pair of Bose QC3's before. Got these because Id worn the QC3's four days per week for 2 years and they finally broke. Decided I wanted something wireless. Exactly what I expected. Would be 5 stars if the battery lasted longer, or if it came with a spare battery (like the Bose QC3's did). Also, if you've had a pair of QC3's in the past, these are a little tighter fitting, and the noise cancellation is not as good as the QC3's.
Summary: These headphones are great - good sound quality with the noise cancellation engaged (and not too bad without), the bluetooth is good and the optional cord in case the battery dies is a masterstroke. The on-ear controls don't take too long to get used to, and the interrupt feature works surprisingly well. Phone call handling (using an iPhone 4S) is also good.
Summary: Great sound, though I've also had nearly as good results with Samsung and Panasonic. Controls work well. Folds up quite nicely. On the down sides, the anti-noise doesn't work well in any circumstance I've yet tried, and a long days use will use the whole battery. On a brighter note, you can buy spare batteries, so they aren't scrap when the battery wares out, and you can swap in another battery towards the end of a long day.
Summary: I'm using it mostly to listen to audio books while commuting. I'm happy with sound quality and noise cancellation (which is a must-have when you want to concentrate on your book in train or while passing a busy road). The controls on the right ear are convenient and easy to access. The only drawback in my opinion is the hefty price. More than that I'm unhappy to know that the spare battery would cost £35!