Skip Navigation

Sennheiser MM 100

Bluetooth® wireless headset, cell phone-compatible

9 Reviews | 1 question - 2 answers

Watch a product review

Item # 143MM100

This item is no longer available.

Shop all Headphones


Our take on the Sennheiser MM 100

Enjoy your tunes and never miss a call with Sennheiser's MM 100 Bluetooth stereo headset. Its convenient wireless design lets you take calls, hold crystal-clear conversations, and hear your music with rich, high-fidelity sound — all from your multimedia-capable mobile phone. The lightweight, neckband design stays securely in place when you're on the go, and provides excellent long-term wearing comfort.

Enjoy your tunes and never miss a call with Sennheiser's MM 100 Bluetooth stereo headset. Its convenient wireless design lets you take calls, hold crystal-clear conversations, and hear your music with rich, high-fidelity sound — all from your multimedia-capable mobile phone. The lightweight, neckband design stays securely in place when you're on the go, and provides excellent long-term wearing comfort.

The MM 100's open-back earpad construction gives your tunes added acoustic depth and detail while allowing you to hear what's going on around you — a big plus on busy city streets. Convenient controls on the earcup let you adjust volume, skip tracks forward or back in a playlist, and answer or end calls on compatible Bluetooth devices, all without ever having to take your phone out of your pocket. Sennheiser supplies a handy USB charging cable plus a wall charger in the box for keeping your 'phones powered up and ready to go.

From the review Sennheiser MM 100 and MM 400 Bluetooth headsets: A family review of a headphone family

This thing is awesome! I could hear the music on my iPod touch® perfectly, nearly blocking out the more annoying people around me when I turned them up loud enough. This headset is very comfortable. It's light and the band is kind of thin and fit just behind my head. The sound quality was great."

— Marshall, Crutchfield A/V Writer

Product Highlights:

  • neckband-style, on-the-ear design
  • Sennheiser's Open-Aire design for wide dynamic range with detailed, natural sound (open design does not block outside noise)
  • Bluetooth® wireless operation:
    • stereo A2DP for streaming high-quality audio from compatible cell phones, music players, and computers
    • Audio/Video Remote Control Profile (AVRCP) for hands-free operation with compatible devices
  • invisible, built-in microphone for clear phone conversations
  • Bluetooth transmission range: up to 33 feet
  • talk time: up to 9 hours
  • listening time: up to 7.5 hours
  • standby time: up to 220 hours
  • rechargeable via supplied USB or wall adapter
  • integrated track, volume, and answer/end controls on the right earcup
  • frequency response 22-20,000 Hz
  • USB charging cable and wall charging adapter included
  • weight: 1.9 oz.
  • warranty: 2 years
  • Our 60-day money-back guarantee

What's in the Box:

  • Bluetooth portable headphones
  • 40" Charging cable (USB type-A connector on one end and mini USB type-B 8-pin on other)
  • Power supply adatper (5 volt DC/150 mA)
  • Quick Guide
  • Instruction manual (English/ German/ French/ Italian/ Spanish/ Dutch/ Portuguese)

Featured Video:


Sennheiser MM 100 Reviews

Average Customer Review(s):

(9 Reviews)

great sound

Ollie P from Pennsylvania on 7/18/2015

Crutchfield Customer Review (What's this?)

easy to set up. takes awhile to remember how to use the controls while wearing the head set.

Pros: light weight blue tooth limiting quality of the sound

Cons: waiting for the blue tooth transmitter to use for the TV instead of "TV Ears"

Not enough advantages to go wireless

Peter T. from Lafayette, CA on 7/23/2014

Crutchfield Customer Review (What's this?)

I'm comparing this model to a wired Sennheiser model with a microphone for voice calls. There's not a lot of reason to go wireless. The wireless model has good sound quality, but the volume is a lot lower than the wired model. They're nice when out on a walk. I found they aren't loud enough on a crowded commuter train, or any place noisy. They aren't the best choice for a workout either. They become drenched with sweat really easy, and the manual states to keep them away from liquids. I probably wouldn't purchase them again if I had a good set of wired headphones. If you have to have wireless open air headphones, these will satisfy most of your needs.

Pros: Comfortable. Decent battery life

Cons: Not loud enough, ear buds absorb sweat


Rick from Chattanooga tn. on 5/3/2014

Crutchfield Customer Review (What's this?)

Best sound in Bluetooth open ear headphones I've tried

Pros: comfort, sound quality

Cons: 0. They are what they say they are

wonderful start to bluetooth finish

Chuck from cape cod,ma on 8/3/2013

Crutchfield Customer Review (What's this?)

would do it again

Pros: easy to set up, great sound

Cons: non

Fair headset, but not worth the price.

cinsteadofak from Minneapolis, MN on 8/2/2013

Crutchfield Customer Review (What's this?)

I purchased this and the Motorola MOTOROKR S306 at the same time. Overview of the benefits over the other. The Sennheiser was more comfortable, cut out less, had better sound quality, better build quality, and had replaceable earfoams. The MOTOROKR was a third of the price, used a micro-usb charging cable, did not have the annoying beep when placed on mute, and did not make me look like Mickey Mouse when wearing it. Due to the charging cable issue, I got rid of the Sennheiser MM 100 and use the MOTOROKR on a daily basis.

Pros: Comfort, reliability, replaceable earfoams

Cons: Makes you look like MIckey Mouse (maybe a pro for some), annoying beep when muting, proprietary charging cable (should be micro-usb)


SENNHEISER MM 100 from EASTVILLE, VA. on 8/30/2012

Crutchfield Customer Review (What's this?)

I'am not thrilled with this headset, but I have a very large head ( size 8), so it's always hard for me to find anything for my head.

Pros: Headset fits around behind my neck instead of over the top of my head. It's probably the only headset that I can wear.

Cons: The earpads are not comfortable . For the price Sennheiser should provide a hard plastic case of some sort. I recently bought a $60 sonicare toothbrush that came with a carrying case.

Great Product!

Robert from San Francisco, CA on 7/6/2012

Crutchfield Customer Review (What's this?)

Great for working out!



Doesn't cut it

Cw from Eastern Shore, MD on 6/10/2012

Crutchfield Customer Review (What's this?)

When it works, it's great with good sound. How ever it routinely just stops working. Won't turn on and it's not happy.

Pros: Good sound when it works.

Cons: Routinely just shuts off after random amounts of time. Usually less than an hour.

Would not recommend

Tom from Chicago, IL on 4/7/2012

Crutchfield Customer Review (What's this?)

The MM-100 is one of the better BT headphones out there, but it's not perfect. Ive owned it since Feb 2012. This headset connects easily across multiple devices with no trouble. The construction appears weak, but you want something light on your head if you're wearing it for hours. I listen to a wide range of music. Hip Hop, Dance, Rock, etc., sounds great with moderate bass and dynamic sound. The deal breaker for me is when I play meditation, nature, or more quiet music such as a solo piano; I can hear some sort of electronic noise feedback in the right ear. The noise stops after 3 seconds from being unpaired from the device. I've paired with the Iphone4, Ipad2, 3 other cell phones, and Win7 PC all resulting in the same issue. I've tried using it in different locations- it still had that faint clicking sound. I have used a different brand of headphones for years and will continue to use it until someone can top it. One other annoyance factor is you have to use the charging cable that comes with the MM-100. A micro-USB charging cable would be nice.

Pros: Connects easy, lightweight

Cons: Proprietary charging cable, faint clicking sound in right ear


Hands-on research

Features and Specs

Fit Style On-ear
Earcup Type Open
Earcup Width x Height 2.5" x 2.5"
Noise-canceling No
Bluetooth Yes
Mic For Taking Calls Yes
iPhone Control ---
Lightning Connector No
Android Control ---
Frequency Response 22-20k Hz
Sensitivity N/A dB
Impedance N/A
Weight 1.9 ounces
Cord Length N/A
1/4-inch Adapter Included No
Volume Control Yes
Parts Warranty 2 Years
Labor Warranty 2 Years

Product Research


Bluetooth Wireless Reception/Transmission: The Sennheiser MM 100 features Bluetooth v2.0 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).

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

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, pause, and play. 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. The 2nd generation iPod touch, iPhone 3G, and iPhone 3GS support only the play and pause audio functions via AVRCP.

Battery Pack: The MM 100 has a built-in Lithium-Polymer battery pack which provides up to 7-1/2 hours of music playback or up to 9 hours talk time (phone). An AC adapter is included to charge the battery pack; charging time is approximately 2-1/2 hours. The headphones can also be charged using a computer's USB port.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

1 question already asked

It works with all blue tooth capable phones. [ SELECT  Sep 16, 2014 ]
I use it with an iphone, but it us just a bluetooth device, so I assume it would be fine. [ TODD J  Sep 16, 2014 ]