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Item#: 9SIA7GA2MN4687

Sennheiser MX685 Adidas SPORT Headphones

  • 1/8 inch (3.5mm) Connector
  • Symmetrical cable
  • Maximum ruggedness and durability
  • Slide-to-Fit holding mechanism for secure
  • 2 year warranty

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews


Sennheiser MX685 Adidas SPORT Headphones

Durable, portable and secure, these ear buds are perfect for your active lifestyle and deliver powerful, natural stereo sound. Sliding holders help keep them in place and adapters ensure a snug, comfortable fit.


Move up the fitness ladder and push yourself harder with the MX 685 SPORTS earphones. The unique, patent-pending slide-to-fit holding mechanism ensures a custom fit that is comfortable and secure. You can focus your attention on your workout, not on your ears. The high-output drivers deliver an energizing yet natural stereo sound, motivating you to run that extra mile. Design-wise, the in-ear style provides greater situational awareness and safety: you can stay aware of surrounding traffic noise while you exercise.


The headphone is sweat- and water-resistant. Various ear adaptor sets offer maximum comfort.

Slide-to-Fit holding mechanism provides a secure, comfortable fit throughout your workout.

Ideal for use with all MP3, iPad, iPod, iPhone, miCoach, CD players, mobile phones (3.5mm) and A/V systems installed in gyms. Two-year warranty.

  • Maximum Ruggedness and Durability
  • Customized Fit
  • Excellent Connectivity


Frequency Response 18Hz - 20,000Hz
Sound Pressure Level (SPL) 118dB (1kHz / 1Vrms)
THD - Total Harmonic Distortion (1KHZ, 100 DB SPL) <.05%
Impedance 16O
Weight 150g
Cable Length 1.2m symmetrical cable
Jack 1/8in. (3.5mm) Angled plug
Warranty Two-Year

What's in the Box



Learn more about the Sennheiser Electronic corp. MX685

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details

Customer Reviews of the Sennheiser Electronic corp. MX685

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  • Anonymous
  • 3/15/2015 3:15:41 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggswasted

Pros: cool looking

Cons: earpieces come off really easily, you'll lose 'em soon.
sound not so great
low volume

Other Thoughts: don't recommend

Did you find this review helpful? Yes No

  • Adam L.
  • 2/22/2015 2:18:32 AM
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsGood not great

Pros: Good sound, supposedly water resistant.

Cons: These hurt my ears after wearing them for more than 20-30 minutes. I have owned other Sennheiser and Adidas/Sennheiser earbuds, behind-the-head earphones, and studio style cans. These are good, but the least comfortable I have worn.

Other Thoughts: Please make a version of the PMX685i for Android.

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  • Anonymous
  • 11/25/2014 11:46:50 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsAverage

Pros: it works
Looks cool

Cons: Sound quality pretty lame
Different types of earpieces are useless, some ripped first week, others come off while taking off or putting headphones on.
Ended up using the original blue ones.

Other Thoughts: I used to have Bose mie2 which went through the Kirby vacuum cleaner. They worked after but the wiring was stripped. Decided to buy new headphones with similar ear attachment. Found these. I purchased Sennheiser before and really expected good quality. Nope. Disappointed.

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  • Anonymous
  • 1/14/2014 7:09:16 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGym headphones

Pros: Sound quality is about what I expected from the price range. Low end needs a bit of a boost from the source side, but that may be due to me having trouble getting them to fit properly.

Adjustable size

Still working, even after almost a year of gym abuse, which is about 6 months longer than my previous earbuds.

Cons: Like I said, I have a bit of trouble getting them to fit. They aren't too loose, but I'd like a slightly snugger seal.

I have to be conscious of the adjustable tabs, they're like little fish hooks that like to get snagged on everything.

1 out of 1 people found this review helpful. Did you? Yes No

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