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Sennheiser MM 450

Noise-canceling Bluetooth® wireless headset, cell phone-compatible

Item #: 143MM450

1 Review

This item is no longer available.

Original Price: $299.99

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The travel headset you've been waiting for
Built with the world traveler in mind, Sennheiser's MM 450 lightweight portable headphones give you superb stereo sound, wireless convenience, and relief from the din around you. Now you can listen to your music in peace, manage phone calls, or chat with a seatmate, all without ever taking off your headphones. Sennheiser's active noise-canceling circuitry quiets outside sounds, while Bluetooth technology lets you make hassle-free wireless connections to compatible devices, such as many cell phones, laptop computers, tablets, and MP3 players. Integrated volume, track skip, and call answer/end buttons built into the earcup provide 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 450's soft earcups feature plush leatherette cushions that feel great. An adjustable padded headband ensures comfortable listening for hours on end, making these 'phones ideal for long trips. Plus, they fold up into a compact package to fit inside the included carry pouch for easy transport. Sennheiser's patented Duofol™ diaphragms deliver detailed, crystal clear sound. 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.

From the review the Sennheiser MM 450 Noise-canceling Bluetooth® wireless headset: Great sound in the air and on the ground

"I was truly impressed by the sonic spectrum that the headset could reproduce without a wire in sight. A surprising amount of bass thumped through the on-the-ear-style ear cups, and the highs were well-defined and balanced. I called my wife... and her voice came through loud and clear through both ear cups. And while I'm not exactly sure where the microphone is on 450, it picked up my voice well, and she could hear me just fine on her end, too."

— Jon, Crutchfield Video Editor

Product Highlights:

  • portable, folding, on-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
  • advanced DuoFol™ drivers for detailed sound and extended frequency response
  • rechargeable lithium-polymer battery included
  • single battery charge gives you:
    • up to 20 hours talk time without NoiseGard
    • up to 10 hours listening time without NoiseGard
    • up to 8 hours listening time with NoiseGard
  • 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
  • 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 case included
  • weight: 3.8 oz.
  • warranty: 2 years
  • Our 60-day money-back guarantee

Sennheiser MM 450 Reviews

Average Customer Review:

1 Review

Good not Great

Written by: Brent from Delaware on January 27, 2012

Crutchfield Customer Review (What's this?)

The bluetooth connection is a great liberation from the bondage of cable. It is wonderful to be able to move and wander without getting confined by wire. There is some loss of fidelity using Bluetooth that is device dependent; sound quality using iPad is far superior to HTC android phone. Frequency response is good as is sound definition, but dont expect driving bass notes. Overall listening experience is good.

Noise cancelation provides some benefit, but does not result in a wall of isolation, I can still hear my wife talking. I suppose that might be a good thing. The premium for noise cancelation suggests a level of performance that is not delivered here.

The battery lasts two to three hours, which is also about the limit for wearing comfort. The built in mic works great with the mobile phone for comfortable long conversations.

Component quality is good and built to last. The carrying case and assortment of cables is good.

Pros: Wireless Bluetooth connection. Sound quality. Rechargeable battery. Connects to everything.

Cons: Inadequate noise cancellation. On head comfort.

Hands-on research

What's in the box?

Download owner's manual

  • Bluetooth wireless noise canceling headphones
  • Lithium Polymer battery (installed/ 3.7 volt/1 Wh)
  • 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
  • Instruction manual CD-ROM

Features and Specs

Fit Style On-ear
Earcup Type ---
Noise-canceling No
Bluetooth No
Frequency Response 15-22k Hz
Sensitivity 107 dB
Impedance Not Given
Weight 3.8 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 450 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 450 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 450s are wired; NoiseGard can also be turned off when not needed.

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 450 has a removable Lithium-Polymer battery pack (3.7 volts DC/1 Wh) 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 450 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.

Our Product Research Team

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