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Sennheiser CX 685 Adidas Sports In-Ear Headphones

4.1 out of 5 stars 808 customer reviews
| 55 answered questions

Price: $64.94 & FREE Shipping. Details
Only 5 left in stock.
Sold by YJ global_ebiz and Fulfilled by Amazon. Gift-wrap available.
Standard Packaging
  • Enter your model number above to make sure this fits.
  • Designed with sports afficianados in mind
  • Engineered and tested for optimal comfort and fidelity
  • Remains safely and securely on your head during physical activity
12 new from $59.99 2 used from $49.61 2 refurbished from $39.99

There is a newer model of this item:

Warranty Information: This product comes with a 2 Years warranty.

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$64.94 & FREE Shipping. Details Only 5 left in stock. Sold by YJ global_ebiz and Fulfilled by Amazon. Gift-wrap available.

Frequently Bought Together

  • Sennheiser CX 685 Adidas Sports In-Ear Headphones
  • +
  • Minisuit SPORTY Armband + Key Holder for Apple iPhone 6 (4.7") Black
Total price: $71.89
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Technical Details

Product Packaging: Standard Packaging
  • Sports-And-Exercise

Product Description

Product Packaging: Standard Packaging

Product Description

The Sennheiser sports range is targeted at the sportsmen/sportswomen who are truly passionate about their sports and music.

From the Manufacturer

CX 685
Natural sound and acoustically closed design
Rugged construction and strain-relief parts
Slide-to-fit mechanism

The CX 685 is part of the Sennheiser/adidas series of sports headphones. Developed and designed with professional athletes, the series offers improved fit, comfort and acoustics for even the toughest workouts. The CX 685 delivers natural sound and an acoustically closed design. The rugged, water resistant construction features para-aramid reinforced cables, strain-relief parts and a slide-to-fit holding mechanism to ensure a perfect fit.

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 and microphones. Every Sennheiser product endures rigorous quality control tests to ensure you receive durable, great-sounding gear that will withstand daily use in a variety of environments.

  • Para-aramid-reinforced cables for superior strength and durability
  • Perspiration and water resistant
  • Fine-tuned 10mm transducer delivers optimal sound performance
  • EarFin holding system for secure and comfortable fit
  • Slide-to-fit mechanism
  • 2-year warranty
Did you notice?

The CX 685 features an acoustically closed design, making it a perfect choice for indoor use.

Sennheiser recommends this headphone for ...

... consumers who are passionate about sports and music.


The CX 685 SPORTS is an ear-canal phone with a frequency response of 18 to 20,000 Hz.


The CX 685 is covered by a 2-year warranty.

Technical data
Frequency response 18-20,000 Hz
Sound pressure level (SPL) 120 dB (1 kHz/1 Vrms)
THD-total harmonic distortion (1 KHz, 100 dB SPL) <.05%
Impedence 16 Ω
Weight 149 g
Length  1.2 m symmetrical cable
Connector plugs 3.5 mm angled plug
What's in the box?
  • CX 685
  • ear adapter set
  • cleaning tool
  • cable clip
  • storage pouch

Product Details

Product Packaging: Standard Packaging
Product Warranty: For warranty information about this product, please click here [PDF]
  • Product Dimensions: 1 x 1 x 1 inches ; 3.5 ounces
  • Shipping Weight: 4.2 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B0094R4POC
  • Item model number: CX 685
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (808 customer reviews)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here [PDF]
  • Date first available at Amazon.com: September 18, 2012

Customer Reviews

Top Customer Reviews

Package Type: Standard Packaging Verified Purchase
I had previously owned the Sennheiser CX 680 Earfin Sports Earbuds. I wrote a lengthy review of these earbuds, which is the "Most Helpful" review of this product on Amazon.com. I used my CX 680s several times a week at the gym and they performed well; they had a good run (so to speak). After about two years the plastic piece that connected one of the earbuds to its wire came loose, but it was easily fixed with superglue. About six months later, however, the sound gave out in one earbud, forcing me to trash them.

In hindsight, and in light of my recent purchase of the CX 685s, I would give the CX 680s 3 stars. The thing that bothered me the most about them was that with a lot of movement and sweating (e.g., running) the earfins sometimes became squishy and dislodged from my ear, thereby causing the earbud to come out. This was annoying and kind of defeated the purpose of these types of earbuds. By comparison, I will say that the PMX 70s (also reviewed) stayed in much better than the CX 680s during exercise. The downside to them for me was that they were the neckband type and were not noise-isolating. Those things and the sound starting to cut out due to issue with the wiring within several months of use (I just sent them to Sennheiser hoping they will repair or replace them) forced me to look for new earbuds.

Again I spent many hours searching for and reading reviews about earbuds designed to be noise-isolating and stay in place during activities like running. I narrowed my search to
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By Dan on November 15, 2012
Package Type: Standard Packaging Verified Purchase
Just got these headphones and am very satisfied. A few years ago I bought some sennheiser headphones (twist to fit, orange. Model no longer being made) and was very happy with the sound quality and fit during workout. The wire recently wore out after 3 + years of 3-4 times/week usage. The sound quality was great and they fit very well, never slipped during a workout (moving and slipping during workout was my main complaint before buying them). I had bought the CX 680 recently but sent it back, as the earfins did not hold them securely in my ear(plastic not hard enough to keep them in ear w sweat and moving).
These headphones have excellent sound quality across all music, from oldies to led zeppelin to new R&B(great bass). They fit well in the ear and stay there, as the plastic is firmer. The 3 size adjustments are also nice. They are in-ear models, so have a slightly different feel from most others that have foam-like padding on the headphones that sits outside the ear canal. These almost feel like having small earplugs in, which can be good or bad depending on your needs. They definitely block out more outside noise, so you don't hear the music at the gym that you don't want to. However, if you plan on using them to workout with a partner(or anywhere you want to have conversation while working out), you may have to take them out to hear somebody else talk. My old ones I could just pause my music and keep the headphones in, but these block out much more sound. This may also be dangerous if you use them jogging in an urban environment where you can't hear cars or people yelling. These are also water proof so you can rinse w water after your workout to keep them from getting buildup.
Overall, I think they're a great buy. I am loyal to this brand after my previous purchase, and will hopefully get good use out of these.
5 Comments 60 of 65 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Package Type: Standard Packaging Vine Customer Review of Free Product ( What's this? )
If you run, finding headphones with the ideal mix of fit and sound-quality is always challenging. Based on the product description for these, I was hoping for the best of both worlds. Unfortunately, it only delivered one half of the equation for me.

These are "in-ear" headphones, which means you need to insert the bud into your ear canal. The package contains 3 interchangeable tips, so you'll need to find the one that fits your ear canal the best. You need to slightly twist them into your ear canal to seal them. Then, there's a second component to holding them in-place. The earbud has a flexible tip on an adjustable extention that you must fit into the ridge of your ear, just above your ear canal. Let's just say -- figuring out how to get this work will require some trial-and-error, and perhaps a mirror. Eventually you'll have "Eureka!" moment and you'll realize they are securely in your ear.

Continuing on comfort...when I have these positioned correctly in my ear, they initially feel good. They stay secure during a 30-minute run on a treadmill. There is a included clip that you can attach to the cable, and then attach to your shirt, to keep the cable from banging around on your chest, which minimizes any vibration and tugging on the earbuds in your ears. When it comes to keeping these "in the ear", the design works incredible well.

However, I don't recommend wearing them for extended periods of time because -- at least for me -- they get extremely uncomfortable. Not only are they "in your ear", but the added flexible tip ends up pushing up against the ridge of your ear with a bit of pressure. After about two hours of use, I have to stop using them. This doesn't make them good for all-around, every day use.
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3 Comments 57 of 70 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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