Wow..... This is amazing, I gave it to a deaf person and within two minutes he started singing "shape of you"..

It's rare that we dole out a one out five G-rating for a gadget, but the Sennheiser MM 550-X Travel headphones are one of the sad exceptions. Find out why in the clip above from our noise-cancelling headphones group test.

Bought these for $380. I have not used these to test calls. Does more than I originally thought with my iPod. Pressing the bluetooth button while it's active will activate the voice recognition program (Siri for later devices) and will use the built in mic for you to talk to it.

(This is a review for the Sennheiser MM 550 headpones, not the MM 550-x.) Comfort: Wore these MM 550's for 5 hours with no breaks (With glasses on as well) and approx; 10 hours total in one day; No noticeable discomfort once they're adjusted properly.

Make sure to charge these fully before using the first time, mine were at 1% juice and died after about 10 minutes; Noise cancellation may suddenly stop working for 1~3 seconds rarely when at mid-low battery.

I've always wanted a pair of headphones that could everything, and I finally found one, the MM 550X. These headphones are the best bluetooth/wired headphones I have tried. I owned Beats Solo HD's, Beats Studio's, Beats Mixr's, Wireless Beats, Bose QC 3's and QC 15's, AKG K 495's, and the list goes...

Great sound quality; comfy; practical; multi-purpose

srs? Max volume not so high

Can't decide if you want a wired or wireless pair of headphones, or one with active noise cancellation or without? If you've got the cash, you can have it all with the Sennheiser MM 550-X (£350), an extremely well designed set that covers practically every situation you'd ever encounter.

Top sound quality in wireless mode; Smartly designed controls; Very comfortable; Rugged; folding design

Very expensive; Noise cancellation affects audio quality

Can't decide if you want a wired or wireless pair of headphones , or one with active noise cancellation or without? If you've got the cash, you can have it all with the Sennheiser MM 550-X ($499.95 direct), an extremely well designed set that covers practically every situation you'd ever encounter.

Very expensive; Noise cancellation performance, while solid, isn't class-leading; Audio quality takes a big hit when noise cancellation is activated

Headphones don't come much more feature-packed than the Sennheiser MM 550 Travel, a set virtually identical to the PXC 360 BT. They offer active noise cancellation and Bluetooth wireless streaming, as well as an SRS "3D" sound mode.

Feature-packed; Comfortable

Noise cancellation ruins sound; Slightly fiddly to use; Expensive

I didn't enjoy spending this sort of money, but trust the brand so made the leap, the sound quality for Bluetooth is amazing, these are easily comparable to a wired set of cans. Anyone needing the noise cancellation function should stay well clear though as the function on these headphones simply...

Good dynamic with a high yield for this headphone that incorporates the highest technology and the expertise of Sennheiser.

Bose and Beats are all smoke and mirrors these are the real deal! they are a must have for the audiofile on the go. I've just got my Audez'e LCD-2 today, can't imagine having to listen to the mm550's, but for walking and moving around they are pretty good with bluetooth and my Atrix 4G

Great Sound; Very Compact

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