Sennheiser MM400-X On Ear Bluetooth Headphones /w Mic (Used)

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Quoting product code: B77NX


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About this product


  • Connect to any Bluetooth enabled device for wire-free music on the go
  • Invisible high quality microphone ensures calls are crystal clear
  • Closed design for isolation, great for blocking out unwanted ambient sounds

Product overview

• Connect to any Bluetooth enabled device for wire-free music on the go
• Invisible high quality microphone ensures calls are crystal clear
• Closed design for isolation, great for blocking out unwanted ambient sounds
• Folding mechanism and rotating ear cups combine to provide a compact wireless solution that's perfect for travel
• Intuitive controls clustered on the ear piece for ease of use
• Optional wired connection if they run out of juice or to use on aeroplanes (in-flight adapter included)
• Battery life of 10 hours on a 3 hour charge

What can I connect to these headphones?

Being Bluetooth enabled, you can connect the MM400-X headphones to a plethora of devices including: smartphones, tablets, laptops, and more. Any Bluetooth device will connect flawlessly. As an added bonus, if you have a device that doesn't have Bluetooth, or if the battery runs out - a standard 3.5mm jack audio cable is included for added connectivity.

What are the benefits of Bluetooth headphones?

There are a number of perks to wireless Bluetooth headphones. You can put them straight on without having to untangle wires, listen to music with no fear of getting cables caught on your surroundings, plus they are incredibly easy to store and travel with. They are also perfect for running and sport, where headphones with wires fall short. Listening to great, stereo sound has never been so care and worry free.

What is the battery life like, and how do I charge them?

Thanks to the standard USB cable connection for the charging cable, you can charge these headphones with any USB port. Also included is a wall charger, similar to a smartphone charger, so you can charge quickly and easily when you are travelling. After a 3 hour charge, you'll be able to listen to amazing quality music for up to 10 hours, perfect for those long flights and journeys.

Notable specifications

With a frequency response range of 15-22000Hz, these headphones can reproduce a huge variety of sounds with ease, and thanks to the total harmonic distortion being less than 0.1% at 1kHz- you'll be able to crank them up with without fear of distortion.

Rated 5 out of 5 by from Really excellent I purchased these a few months ago, and was pleasantly surprised that even though they are advertised as "Used", they showed very little signs of use at all. The packaging wasn't sealed, but everything was complete, and in mint condition. As for the headphones themselves, the sound quality is really very good. When testing with an aptX capable device (iMac 2009) there is a slight noticeable increase in quality compared to a standard Bluetooth device (OnePlus 3 in my case). The absolute best feature of these headphones (and indeed the reason that I chose them) is their ability to connect over BlueTooth or the provided cable. This means that when you run out battery (which I've found takes around 6 hours) but want to keep listening, you can pop the battery out, put it on charge, attach the cable and keep listening as the battery recharges. Really clever idea, and it's come in very useful! The only two downsides I've encountered so far is that after wearing for a long period of time (over 12 hours), they start to hurt a bit, but I suppose this is to be expected as they are on-ear headphones rather than in-ear. The only other issue is that when using Bluetooth, there is a very very tiny lag between the audio being sent from the device and it being played in your ear. For music this is a non-issue, but for films some people may find this annoying. Personally, the lag was so small it wasn't an issue, but if you think this may be an issue, then there are two solutions: you can add a delay in your video playing program (I use VLC) to counter the delay in audio, or you can use the cable. When using the cable, the audio is absolutely instant, as you'd expect. Apart from these small niggles, these are wonderful headphones and I'd recommend them to anyone, especially at the reduced "Used" price.
Date published: 2017-09-19
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Acoustic System Closed
Colour Black
Folding Yes
Microphone / Remote Yes
Noise Cancelling No
Noise Isolating No
Rotatable Cups Yes
Water Resistant No
Requires charging Yes
Requires batteries No
Weight 105 g
Connector 3.5 mm jack plug
Gold-plated Connector Yes
Cable length 1.2 m
Detachable cable Yes
Single-sided cable Yes
Wi-Fi enabled No
Wireless Yes
NFC enabled No
Device compatibility
Smartphones Yes
Tablets Yes
Computers Yes
Aeroplanes Yes
Frequency response 15 - 22000 Hz
Impedance N/A
Driver type Dynamic
Driver diameter Manufacturer not specified
Maximum input power N/A
Sensitivity N/A
Package contents
MM400-X Bluetooth headset
USB wall charger for US, EU, UK and AU
USB charging cable
In-flight adapters
Audio cable
Carry case
User manual

What does "used"mean?

Asked by: George
Generally this means the item has been on display in store and will generally be at a discounted price , and will come with a 12 month warranty in place from date of purchase.
Answered by: Darren
Date published: 2016-09-29

can I hear a TV through the earphones

Asked by: Jordy
It would depend on your TV and if it supports bluetooth audio output.
Answered by: Billy
Date published: 2015-10-03

Does the H/S come with the Blue tooth transmitter?

Asked by: davied
No the headphones do not come with a stand alone transmitter , the blue tooth transmitter is built into the head phone casing.
Answered by: Darren
Date published: 2015-07-31

What does "used" mean when sold by a retailer like Maplin?

Asked by: KEM2
The word (used) on our web site refers to a product that has been out to a customer before and has not for some reason been suitable for them, all our used items are in A1 condition.
Answered by: Darren
Date published: 2015-07-27
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