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  • Sennheiser CX 685 Sports In-Ear canal Headphones
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Sennheiser CX 685 Sports In-Ear canal Headphones

249 customer reviews
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Currently unavailable.
We don't know when or if this item will be back in stock.
  • Robust moisture resistance for active sports use, rinse clean (not waterproof)
  • Sealed ear canal design for blocking noise (indoor use), ideal for gyms
  • Slide-to-fit system for adjustable individual fit
  • Natural sound that delivers energising volumes to help motivation
  • Supplied with ear adaptors (S/M/L), cleaning tool, storage pouch and cable clip
Currently unavailable. We don't know when or if this item will be back in stock.

Product details

  • Product Dimensions: 2.5 x 2.5 x 2.5 cm ; 454 g
  • Boxed-product Weight: 118 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • Item model number: CX 685
  • ASIN: B0094R4POC
  • Date first available at 31 Aug. 2012
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (249 customer reviews)

Product Description

CX 685 SPORTS Headphone

For all men and women who are truly about passionate about their sport and their music, Sennheiser sets a new standard for premium sports headphones. Designed in conjunction with Adidas, these headphones have been tested extensively in the field for ergonomic fit, durability and reliability. Think of these headphones as‚ from Athletes for Athletes‘ who place rigorous demands on their equipment and don’t settle for compromise.

  • Ear canal design blocks outside noise within the gym or sports hall, for example
  • Unique ‘slide-to-fit’ system (not visible) to customize height for comfort and a more secure fit (patent pending)
  • Perspiration and water-resistant, to easily cope with challenging conditions
CX 685 SPORTS Headphone
CX 685 SPORTS Headphone
Learn more about the CX 685 SPORTS

This sports line is brimming with ingenuity; from inner protection against perspiration and pouring rain, to the provision of a close, secure fit so that you are able to concentrate and focus on what really matters to you. What’s more, these headphones deliver an energizing beat to tune yourself into.

  • Ear canal fit blocks out background noise for complete focus without distraction, no sound leakage – plus you can listen at lower volumes
  • Punchy bass sound that is acoustically fine-tuned to deliver high volumes
  • Designed to absorb shock and minimize wear, heavily tested for intense periods of use – tough strain relief for example
  • All parts are heavily tested and use high durability materials to absorb shock and minimize wear
  • Can be rinsed clean after use under running water (store air-dried)
  • Customized fit – revolutionary EarFin holding system (rubber hooks) for secure fit, individual height adjuster to suit different ear shapes, ear adaptor set
  • 2-year warranty
CX 685 Accessories
CX 685 Accessories
Did you know?

Bringing together the best of both worlds, adidas and Sennheiser continue to challenge standards. As a result, this is the fourth generation of this range and contains a choice of two different models. Each features a more secure holding mechanism that provides better wearing comfort, tougher cables to withstand any sports activity and a powerful and energizing sound.

Sennheiser recommends this headphone for...

Sportsmen and women who exercise indoors in a busy and loud environment and would like to be able to focus solely on their music and sports activity. Music lovers who are looking for a pair of headphones that will defy the harshest conditions that will also deliver great sound, an excellent fit and maximum comfort.


This headphone is compatible with any device with a 3.5mm headphone socket for audio, including iPod, iPhone, miCoach, other portable music/video players, mobile phones and audio-video systems that are installed in gyms (iPod and iPhone are trademarks of Apple Inc. registered in the US and other countries).


The CX 685 is covered by a 2-year warranty. Sennheiser’s worldwide service network will provide swift and smooth handling of any case of warranty that might occur. Strict German build-quality standards.

Why Sennheiser?

Sennheiser is the brand of choice for many high-profile recording artists and live sound engineers, delivering the ultimate audio experience to people who crave true-to-life sound. For over 65 years, Sennheiser has applied its in-depth audio research to the development of premium headphones, microphones and headsets. Every Sennheiser product endures rigorous quality control tests to ensure you receive durable, great-sounding headphones that will withstand daily use in a variety of environments.

Product Details
Product Details
TypeIn Ear HeadphoneIn Ear Headphone
Frequency Response18 – 20,000Hz18 – 20,000Hz
Acoustic DesignOpen Acoustics for Natural Sound (Best for Outdoor Use)Sealed Acoustics Block Outside Noise (Best For Indoor Use)
Impedance16 Ohms16 Ohms
Volume ControlNoNo
Cable Length1.2 m Symmetrical Cable 1.2 m Symmetrical Cable
Connector Plugs3.5mm Angled Plug3.5mm Angled Plug
Sound Pressure Level118 dB120 dB
Warranty2 years2 years

Customer Questions & Answers

Customer Reviews

4.1 out of 5 stars

Most Helpful Customer Reviews

39 of 40 people found the following review helpful By Jason Gaston TOP 1000 REVIEWERVINE VOICE on 2 Dec. 2012
Vine Customer Review of Free Product ( What's this? )
As a fan of the brand I was already excited to receive these headphones and this would make up my 3rd pair in the past year or so as I do a lot of running. My first reaction was the practically of them, the little fin that keeps the bud in you ear is very effective indeed for maintaining a nice snug fit and the lack of head or neck band on these ones makes them ideal for other sports or gym activities and not just running as the neck band becomes obtrusive when using gym equipement.
In the pack you get the headphones, adjustable fins, replaceable buds and (BEWARE) you get replacements for the inside of the earphones too which are miniscule in size and could easily be discarded so be warned they are in a small clear poly bag and look like to small rolls of cotton or something but they are about 2milimeteres in size. The overall sound for these headphones was quite impressive considereing sports headphones usually fall a little flat in this department, the bass was full (helped by the snug fit) and the top ends where crisp and punchy.
You also get a cable clip as with most in the brand so if you use an armband you can clip the exess cable to this to prevent it swooshing about in front of your face, this is especially helpful when it comes to running or jogging.
My only critsism with these is this, as they are such a snug fit in the ear when running the cable kinda bobs up and down and causes a slight tugging motion of momentum on the buds, this is nowhere near enough to displace the buds but does create a kind of dull thud which can be quite annoying when audiable such as gaps in music or quite parts of music.
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79 of 82 people found the following review helpful By Amazon Customer on 18 Jun. 2013
Verified Purchase
I am not a Olympic athlete, but I am fit and I have trialled and broken sports headphones in just about every environment on the planet so when I give this product 5 stars its because I mean it.

The headphones are well built, they are as rugged as can be expected for the size. They hold the ear extremely well (I have no idea how they thought up the in ear mechanism or how it works so well, but bravo). Whilst talking about build, the inside ear component is made of rubber which effectively adds a sweat shield from the speaker part itself from your horrible sweaty head as you pound the asphalt, the downfall of many of my old headphones. Big tick VG for the sweatproof system. There are two different sizes of rubber ear pieces so if you have ears like Hilary Swank then they should still be as good a fit as for people with more conventionally sized ears.

The sound quality is about as good as you can expect for the price, the bass is deep enough, treble is full and not tinny and the mids are balanced well, all in all quite capable of clearly belting Ministry of Sounds latest shameless rehash of classic house anthems.

If you have the ear fidelity of a vampire bat and want crystal clear sound while you are working out then you are probably better off with the over head things that people seem to use in gyms, probably not so good for running though (and those people look pretty humorous too) or get some space age tech from Bose if such things exist, and pay the premium that comes with it. Remember sound quality is pretty much a function of price and £40 or so will not give you the same quality of sound that £300 will, but who wants to spend that much money on a set of grubby headphones that are going to get covered in rain mud and sweat.
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12 of 13 people found the following review helpful By HoneyPossum on 28 April 2014
Verified Purchase
I had done a bit of research before splashing out on a pair of headphones. I wasn't exactly sure what I wanted, but knew I wanted something in-ear and sound dampening. The reviews for these headphones were very high (with good reason) so I went ahead and bought them.

I was so pleasantly surprised! They are leaps and bounds ahead of any in-ear headphones I have every used. They don't completely kill outside noise, but do a pretty good job. Once my music is on I can't hear anything but that. I also don't get a thud every time my foot hits the treadmill. They sit very well in my ear, and only jiggle out if I haven't put them in properly.

The headphones come with 3 sizes of rubber ear insert (the blue bit) and the black hook is adjustable. I found that if I put on the biggest insert and the hook on the lowest setting they fit perfect. They don't irritate or push on my ear at all. Once they are in, I hardly notice them. You do need to make sure you use the clip to attach the cord to your shirt or the cord will bounce around a lot.

I also love that these are waterproof. I don't worry about damaging them with sweat, and can give them a rinse without worry. This is definitely a big plus.

I loved these so much I recommended them to my partner. He tried them for one session and we had to get him a pair asap!

Be aware, they are very noise cancelling, so if you do use them outside be careful! Probably best not to use them if you are running near major roads as you honestly don't hear anything. Okay for running on paths, but you won't hear bike bells or people calling to you. Sennheiser do make a similar model for outdoor running: Sennheiser MX 685 Sports In-Ear canal Headphones.
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