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Sennheiser MM 400 Wireless Stereo Bluetooth Headset

4.1 out of 5 stars 25 customer reviews

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  • Bluetooth 2.1 for hands-free convenience and advanced A2DP profile for optimised Stereo sound
  • Invisible microphone with high-performance sound quality, padded ear-cushions for comfortable fit
  • Direct cable option, Easy headset controls, 2-year international warranty
  • Headset folds into a compact bundle, headband is metal-reinforced for durability
  • Recharge battery via USB or the international wall charger (supplied)

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Product details

  • Product Dimensions: 8.4 x 20.1 x 19 cm
  • Boxed-product Weight: 699 g
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  • Item model number: MM 400
  • ASIN: B002NZZIFW
  • Date first available at Amazon.co.uk: 22 Oct. 2009
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (25 customer reviews)
  • Amazon Bestsellers Rank:

Product Description

The MM 400 is a state-of-the-art Stereo Bluetooth® headset for multimedia mobile phones.
With one press of a button, you can quickly switch between calls and music delivered in superb stereo sound. The invisible high-performance microphone ensures that conversations are clear, making this headset the perfect all-in-one sound solution.
Otras características:
Colour of product: Black
Connectivity technology: Wireless
Device interface: 3.5 mm (1/8")
Ear coupling: Supraaural
Headphone frequency: 15 - 22000 Hz
Weight: 105 g
Wireless range: 10 m


Customer Questions & Answers

Customer Reviews

4.1 out of 5 stars
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Top Customer Reviews

Let me start by saying that it is not normal for me to take the time to write a review. I find that very few products meet my high expectations, however in this instance I am compelled to share my experience with others.
The purpose of me purchasing these headphones was to go with my new iPad. They paired instantly and I was anxious to clarify the lip sync delay reported by some users whilst watching video. I can confirm that there is no audio delay when watching video on iPad. That is to say the dialogue you hear in the headphones is in sync with what you are watching. Repeating myself there is NO LIP SYNC ISSUE ON iPAD.
These headphone can control the Play/Pause and volume up/down features on both iPad and Iphone. The track skip and fast forward/rewind aren't presently supported on Apple products however this is not the fault of the headphones. They do contain the technology but it is the iPad and iPhone bluetooth firmware that do not, so the headphones are not at fault and I am somewhat bemused how other people writing reviews on this product deduct points/marks/stars for this issue. All the features will be fully supported when Apple update their bluetooth firmware in a future update.
When your iPhone rings it will mute your music and you hear the ring tone in the headset and by pressing the large call answer button you can accept the call. The microphone on the earpiece is almost invisible and I was astonished at the quality of the call and so was the person on the other end of the phone. When you or the other person hangs up by pressing the large button on the headset your music resumes playing where you left off. Enough Said.
I imagined that the five control buttons on the right side of the headset would be over complicated and confusing to use however they are not.
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My reasons for buying these headphones were as follows:
- To listen to mp3's on my Google G2 wired or wirelessly
- To listen to audio wirelessly on my Cowon Q5W
- To make and receive calls on my G2 both wirelessly and wired for when battery is low on either or both the headphones or my G2

- I am a fairly heavy user of headphones and needed something for an average of 3 hours use per day

Sound quality - I am really satisfied with the quality of audio when listening to mp3's. Obviously, I know that mp3 will not test the limit of the MM400's but suffice to say, they are, as you would hope, a huge improvement on the basic headphones supplied with my phone. It's great to hear basslines you didn't know existed!

Connection - This has been frustrating but I will lay this firmly at the feet of my G2 phone and NOT the MM400's. Often, I cannot get the phone to connect to the MM400's, like I said, I put this down the phone and not the headphones - For all you G2/Android users out there, the best way I find to get a connection is to switch phone Bluetooth ON, then switch MM400 Bluetooth on, then switch phone Bluetooth off (wait for phone to say disconnected) and then back on again!

I ran a quick test with an iPhone owning friend who was able to pair first time. But I would be very keen to hear how other iPhone users get on with connecting to the MM400's as I'm sure there are many more iPhones out there than Android phones.

Connecting the MM400's with my Cowon Q5W was successful every time.
I tested the range and call connection was not lost even at 10m. There was no noticable drop in quality over that distance either.

Usability - Once connected via Bluetooth the MM400's on-ear controls are easy to use.
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This is a nice set of headphones. Battery life is fab, connectivity (to iPhone) was a breeze but the overall volume is poor. I have changed ALL the settings on my phone (limits etc) but they are still not loud enough. They also lack bass.

I would still recommend these for wireless freedom, but don't believe the hype surrounding them. They are NOT as great as people state.
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These headphones are amazing. For anyone who has used Bluetooth headphones before and tolerated the poor quality (especially high frequency sounds) this model conclusively blows them all away. The sound quality is almost on par with wired headphones. My old Sony Bluetooth headset and Sony Ericsson Bluetooth earphones are destined for the bin.

The best feature for me is the amazing sound insulation, no need to bother with the more expensive noise cancelling model - background noise is significantly cut. Even when you turn them up loud, the music can not be heard by anyone around. I can now play my music loud on the train without bothering other passengers.

All the accessories are included, even the cables seem to be made of better quality materials than usual. The price is high but is justified considering the build quality.
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Sound: the sound is very good (yes, I know this is subjective). Bass is present and actually has some presence, treble doesn't roll off noticeably at the top end even over bluetooth which surprised me. Overall the sound is very clear, neutral and natural -- it doesn't get wearing over time.

Fit: I've had any number of headphones over the years -- mostly Sennheiser but not all. I've a pair of closed HD250s and I've had open headphones and stick-the-rubber-in-your-ear headphones and the MM 400s are the most comfortable I've known.

Wearability: walking around, you don't get that under-water effect of the rubber-plug style in-ear headphones, and wind-noise isn't exaggerated in the way those headphones do either. The MM 400s block out enough sound, but not so much that you feel completely cut off (you can tell when someone wants to talk to you for example -- a good thing).

Wireless: I'm surprised at how much more wearable these are because of the lack of wires. Nothing catches, nothing drags, nothing pulls the phones off your ears, and yet the headphones are the right weight (i.e. light).

The wired connection, on my Google Nexus One, sounds about the same as through the bluetooth connection. I suspect that (as with other low-power devices) the headphone amp in the phone isn't really high quality so there's probably some roll-off on the high frequencies -- but it doesn't sound muffled. When you're using the bluetooth connection you're bypassing that headphone amp in the phone, and the sound is about the same -- impressive.

I'm really surprised -- I wear these phones at work and at home now in preference to supposedly better wired ones.
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