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Item#: 9SIA22A1MF4775

Sennheiser Black MM 550-X Around-Ear Foldable Wireless Bluetooth Travel Headphone

  • Supports Apt-X for hi-fi sound over Bluetooth
  • NoiseGard 2.0 noise-canceling technology
  • Stereo Bluetooth wireless technology delivers
  • TalkThrough function
  • Large, comfortable earpads for complete re

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews



Sennheiser Black MM 550-X Around-Ear Foldable Wireless Bluetooth Travel Headphone

Welcome to the top-of-the-line in wireless headsets. These Bluetooth®-enabled gems provide unrivaled stereo sound, call-control, and a host of features to provide clear calls and awesome music, anywhere.


With one road-worthy headset, you can listen to music wired or wirelessly, take calls over Bluetooth, cancel 90% of ambient noise, and chat with the person next to you - all without removing the headset.

With the MM 550-X you can switch between calls and music - delivered in superb stereo sound with Apt-X capability, as only Sennheiser knows how - without wires! Luxurious, around-the-ear cups powered by NoiseGard 2.0 eliminates up to 90% of background noise for an incredibly relaxing flight. A convenient TalkThrough function lets you carry a conversation with a seatmate (or teammate) at the push of a button. Selectable SRS surround simulation adds excitement and depth to your audio on-demand.

The invisible microphone ensures that you have the added convenience of taking a call without wires, or hassles - without changing headsets.

Using a closed, around-the-ear design to block ambient noise, the MM 550-X is an ideal companion for the frequent flier or baller. Advanced DuoFol transducers provide the kind of detail and frequency response you would expect from Sennheiser. The easy-to-use control panel is intuitive and simple enough to operate with your eyes closed - a common way of enjoying Sennheiser's world-famous sound quality.

The MM 550-X folds up to fit in any carry-on. The replaceable battery charges via USB or a wall adapter. For situations where Bluetooth is not permitted, you can use the included audio cable for a direct connection - making the MM 550-X at home in any situation where a super quality headphone is required.

  • Bluetooth Technology With the Bluetooth technology , enjoy hands-free convenience without the limitation of wires. You can also listen as a wired headphone when Bluetooth is not permitted thanks to direct cable option.
  • Superior Sound Quality The exclusive DuoFol transducer system delivers real life acoustics and hi-fi stereo sound on Apt-X capable audio sources over the Bluetooth link. The Sennheiser NoiseGard 2.0 technology provides up to 90% active noise cancellation for crystal clear sound. And SRS WOW HD technology adds excitement to older tracks and poor quality rips.
  • Unmatched Comfort Large, comfortable earpads allow for complete relaxation and luxury in noisy surroundings.
  • Easy to Use Controls Intuitive track and volume controls are within optimum reach. TalkThrough function allows you to chat with seatmates without removing the headphones at the push of a button.
  • Fold and Go When you hit the road, fold this headset and store it in a compact footprint for convenient portability.

What's in the Box

  • MM 500-X Bluetooth® headset
  • USB Wall charger for US, EU, UK and AU
  • USB Charging cable
  • In-flight adapters for 1/8in. (3.5mm) double mono jack and 1/4in. (6.3mm) gold adapter plug
  • Audio cable
  • Carry case
  • Quick set-up guide
  • User manual


Learn more about the Sennheiser Electronic corp. MM 550-X

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details

Customer Reviews of the Sennheiser Electronic corp. MM 550-X

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  • Anonymous
  • 12/31/2014 9:31:41 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsTotally not worth it

Pros: Decent sound


Lots of features

Cons: Battery falls out a lot. For no reason at all.

Bluetooth cuts out about once every 3 minutes.

Noise canceling (when turned on) briefly turns off between songs causing a popping noise.

Noise canceling hardly works at all.

Noise canceling button has stopped working after a week. I can't press it at all. There's no clicky-ness to it.

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  • Anonymous
  • 12/24/2014 8:43:00 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsDisappointing for Sennheiser

Pros: These are lightweight, comfortable, and the sound is pretty good. Definitely not as good as a wired set for the same price, but really good for being Bluetooth.

Cons: Poor connection between battery and headset. Battery falls out easily if you bump any part of the headphones on anything. SRS doesn't sound that great, and noise canceling is almost worthless.

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  • Brent S.
  • 10/3/2014 11:00:06 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsComfortable, great noise cancelling

Pros: Very comfortable fit. The cans are a little smaller than what I'm used to for circumaural headphones, but my ears still fit. They fit snugly without pinching, and are cushioned very well all around. Controls are easy to use, and button responsiveness is good. The battery is removable, which is a plus.

Sound wise, they are very clear and the highs are crisp without presenting themselves as too bright. Mids are just as clear without being muddled.

Cons: Horrible bass response. It's just not there. When adjusting the 10 band EQ on the player to compensate, the bass just begins to show but it's turned up so high the player tries to keep it from clipping which results in the player muting bass frequencies. Turning on the SRS on the headphones results in muddling and brightness in the mid to high range with an over-done spatial surround effect. In short, there seemed to be no way to get good deep notes to play at the same volume or clarity of the rest of the frequency band. This was apparent in all types of music and sources - Classical, classic rock, r&b, jazz, rock, metal, progressive, techno... mp3, m4a, flac. Used 3 different devices for play back too. My Tablet, LG G3, and i Phone 5S. Used default music players, RocketPlayer, PowerAmp Pro, etc... Nothing would bring balanced bass to these.

Other Thoughts: I would absolutely LOVE these if they had any bass capabilities. I'm not a bass addict, I just like balanced and well presented audio.

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  • Robert G.
  • 3/8/2014 2:03:12 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAmazing!

Pros: Great Battery Life. Bluetooth to ANYTHING CPU/Phone with mic (Make calls listen to music) does it all Audio boost the SRS works great.. takes reduced quality MP3's and gives them a lift.. Better sound than any corded device I own. Paired very easily and is of a very solid construction. I have a large head and they fit great and I blast them at work and until I take them off people sitting around me have NO IDEA how loud it really is (Until that soft leather seal around my ear is broken) comfortable and light weight. You need a Bluetooth connection if you do not already have one (like an older machine or desktop without one built in) but they are cheap and easy to install so not an issue by any means. They also collapse into an awesome case that comes with all the extras and charging cords and connectors to wire it if you need to go wired! Lots of extras included.

Cons: Expensive! But get what you pay for!

Other Thoughts: I bought them before the price drop and I would do it again!

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  • Jeremy A.
  • 11/9/2012 8:01:59 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week

5 out of 5 eggsGreat.

Pros: Expectations met. You could get better audio quality for the same price with a wired set, but for Bluetooth these are remarkable. Probably the best wireless headphones on the market. These make wired beats studio headphones sound like cheap buds in comparison.

Cons: Not so hot with SRS.

Other Thoughts: Pricey, but when you consider the extras you're getting, and the price you'd pay for a set of good cans with an amp to do them justice, I'd say these are appropriately priced.

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