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A road-worthy headset that does it all
The Sennheiser MM 550 portable headphones give you the best of all worlds — superb stereo sound, wireless convenience, and luxurious comfort. They're fantastic for enjoying your music and managing your phone calls without wires or outside distractions. Built-in active noise-canceling circuitry quiets the environment around you, while Bluetooth technology lets you make a hassle-free wireless connection to compatible devices, such as many cell phones, laptop computers, tablets, and MP3 players. You can even use the integrated volume, track skip, and call answer/end buttons on the right earcup for convenient operation while your phone or music player remains safely in your pocket, purse, or backpack.

Noise-canceling technology gives you peace and quiet
Sennheiser's NoiseGard™ 2.0 technology reduces extraneous sounds by up to 90%, such as engine roar, wind noise, and the conversation of surrounding passengers. Tiny microphones in the headphones pick up the sounds of your environment. Advanced circuitry then creates a signal that "cancels out" much of this external noise without affecting your music or phone calls. A handy "TalkThrough" function lets you temporarily override the noise canceling circuit with the push of a button to carry on a conversation with a seatmate.

Exceptional comfort, sound quality, and convenience
The MM 550's earcups feature plush leatherette cushions that feel great. Plus, their around-the-ear design helps further seal out distracting noise while taking pressure off your ears. An adjustable padded headband ensures comfortable listening for hours on end, making these 'phones ideal for long trips. The headband conveniently folds up for easy storage when you travel. Sennheiser's patented Duofol™ diaphragms deliver detailed, crystal clear sound, while a selectable audio enhancement feature provides added depth and excitement to your music on demand. And just in case you need it, Sennheiser includes a cable plus an airline adapter for a direct wired connection in situations where Bluetooth is not permitted, or you want to make use of in-seat entertainment and other wired sound sources.

Product Highlights:

  • portable, folding, around-the-ear design
  • padded, closed earcups and adjustable headband
  • Bluetooth® wireless operation
  • built-in microphone and wireless earcup controls for hands-free conversations using compatible Bluetooth cell phones
  • NoiseGard 2.0 noise-cancellation technology provides up to 90% active noise cancellation
  • TalkThrough function — lets you pause the noise-canceling for brief conversations
  • SRS WOW HD™ surround simulation technology for added depth and stronger bass
  • rechargeable lithium-polymer battery included
  • single battery charge gives you:
    • up to 20 hours using NoiseGard only
    • up to 10 hours using Bluetooth only
    • up to 8 hours using both
  • advanced Duofol™ drivers with neodymium magnets
  • integrated controls on the right earcup include track, volume, and answer/end call functions
  • frequency response 15-22,000 Hz
  • impedance: 100 ohms passive, 590 ohms active
  • 56" detachable audio cable with stereo mini plug
  • airline adapter, full-size headphone adapter, 48" USB charging cable, multi-country wall charging adapter, and carrying pouch included
  • weight: 6.3 oz.
  • warranty: 2 years
  • Our 60-day money-back guarantee

Sennheiser MM 550 Reviews

Average Customer Review:

1 Review

Sennheiser MM550 Headphones

Written by: Craig M from Newberg, OR on January 22, 2012

Crutchfield Customer Review (What's this?)

So far, I have nothing but praise for these headphones. The fit, comfort and performance are great. The battery lasts days listening to music and only take a couple of hours to recharge. I haven't had a chance to use the noise canceling, but overall, I think they are well worth the $. I would definitely recommend this product.



Hands-on research

What's in the box?

Download owner's manual

  • Bluetooth wireless noise canceling headphones
  • Lithium Polymer battery (installed/ 3.7 volt/ 250 mAh)
  • 56" Wired cable (2.5mm connector on one end and right-angle 3.5mm connector on other)
  • 3.5mm to 1/4" Adapter
  • 48" Charging cable (USB type-A connector on one end and micro USB type-B on other)
  • Power supply adatper (5 volt DC/0.5 amp)
  • 4 AC plug inserts (US/ Europe/ UK/ Australia)
  • Airline adapter
  • Soft carrying case
  • Quick Guide
  • Safety Guide
  • Instruction manual CD-ROM

Features and Specs

Fit Style Over-the-ear
Earcup Type ---
Noise-canceling No
Bluetooth No
Frequency Response 15-22,000 Hz
Sensitivity 107 dB
Impedance 590 Ohms
Weight 6.3 ounces
Cord Length 56"
Airline Adapter Included Yes
iPod Control Yes
Volume Control Yes
Built-in Microphone Yes
Parts Warranty 2 Years
Labor Warranty 2 Years

Product Research


Bluetooth Wireless Reception/Transmission: The Sennheiser MM 550 features Bluetooth v2.1 wireless reception and transmission with a built-in microphone for cable-free use with select Bluetooth enabled phones and audio devices. Supported Bluetooth profiles include A2DP (Advanced Audio Distribution Profile), AVRCP (Audio/Video Remote Control Profile), HSP (HeadSet Profile), and HFP (Hands-Free Profile). The MM 550 saves the connection profiles of the last eight devices with which it was paired; when turned on it automatically tries to connect with one of those devices.

Note: Not all Bluetooth enabled audio devices will be compatible.

NoiseGard 2.0 Noise Cancellation: NoiseGard technology is an active noise compensation system, originally developed for use by pilots. NoiseGard uses tiny microphones to measure ambient noise (up to 1 kHz) near the ears. The phase of the noise is then inverted (180° out of phase) and added to the original noise, reducing background noise by up to 23 dB (90%). NoiseGard can be used with Bluetooth wireless reception or when the MM 550s are wired; NoiseGard can also be turned off when not needed.

SRS WOW HD: SRS WOW HD improves dynamic audio performance by expanding the size of the audio image and creating a deep, rich bass response. Patented techniques are used to widen the horizontal sound field and raise the vertical sound image, retrieving information lost in the mixing process to create a more natural audio experience. SRS WOW HD also uses sculpted filters to maximize the drivers' bass response. SRS can be turned off if you prefer.

TalkThrough: The TalkThrough function allows you to have a conversation with the person next to you without taking the headphones off. When TalkThrough is activated, microphones mounted on the outside of the headphones pick up sound in the immediate vicinity and background noise is filtered out (the music is also turned off).

Controls: On the right ear-cup there are integrated controls for your connected phone or audio device. Audio controls include volume, skip forward or backward, fast forward or rewind within a song, play, and stop. Phone controls include volume, accept call, reject call, end call, redial, voice dial, and mute.

Note: All control functions must also be supported by the connected device.

Battery Pack: The MM 550 has a removable Lithium-Polymer battery pack (3.7 volts DC/250 mAh) which provides up to eight hours playback using Bluetooth reception and NoiseGard, up to ten hours playback using Bluetooth without NoiseGard, and up to 20 hours using just NoiseGard (with Bluetooth turned off). A power supply with US, UK, European, and Australian plug adapters is included to charge the battery pack; charging time is approximately three hours. The headphones can also be charged using a computer's USB port.

Collapsible Design: These headphones feature a collapsible design with metal-reinforced headband to ensure portability and durability.

Cord & Adapter: The MM 550 will also work as wired headphones, useful when Bluetooth connection is not an option. The headphones come with a 56" mini-jack cable terminated by a 3.5mm connector for a wired connection. A 3.5mm to full size 1/4" adapter and an in-flight audio adapter (dual mono 3.5mm) are included for added convenience.

Carrying Case: A nylon carrying case is included to protect the headphones during storage or transport.

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