Summary: Not really noise cancelling and even less 'portable' as the only reliable thing about them is their breakage rate when removed from a room. I have tried to get on with these headphones as I have many other Sennheiser products. My back-up 'phones are Zik, but their delay makes them almost unusable. I'm looking at cheaper 'phones, such as Sony now. Verdict: Reasonable but heavily overpriced. PS. I also have 3 MM550X batteries about to go on ebay.
Summary: Desperately wanted just a little bit more volume on these. Found myself almost in tears having debated for ages about headphones and finally got these. The volume isn't there and all I want is goosebumps. Give me goosebumps! I can't get them with this volume. Even at full blast, it's at at about 6.5/10 for me. I work in radio, so I have a lot of respect for sound quality and the sound seems fine.
they work rather well and certainly one of the best bluetooth wireless headsets on the market
Maisam Lamsehchi, Amazon
23 July 2014
Summary: they work rather well and certainly one of the best bluetooth wireless headsets on the market. however volume is an issue as have mentioned prior, about the only thing letting this product down, even with the built in amp active it still can have issues. connectivity is good and battery life is great for long distance flights which i frequently have to. Cable is also useful as a back up but that i have found is far too fragile and difficult to replace.
Summary: Very expensive for what you get. I wish I hadn't bought them. If you fall asleep on an overnight flight and the headphones touch the seat headrest the headphones switch off and you lose the noise reduction feature. A poor design feature. So not a good purchase for travel purposes.
Summary: So you pay close to £300 for a set of wireless headphones. Good points: - The sound quality is good. - The wireless feature is great. - They're very comfortable. Bad points: - There's a lack of control buttons to make sense of the features. For example, to turn the set on you have to hold play for 4 seconds, to activate Bluetooth you have to hold down play for 5 seconds. - The don't feel robust. -The surround sound feels like a wasted feature.
Summary: It has taken me some time to come to a conclusion on the Sennheiser MM550X. They are a bit of a Curates egg, good in parts, as they can be Bluetooth, hard-wired, have Noise Cancelling, Surround sound and are extremely portable. The Noise Cancelling and Surround sound, are bluntly, not very successful, but overall, the portability, lack of wires and very acceptable sound, makes this a purchase, I can recommend. However, it is very expensive.