If you like to work out hard, the Sennheiser/adidas PMX-680i headphones are built to go the distance with you. These tough-yet-comfortable earbuds are made for heavy movement thanks to their neckband and moisture-resistant design. The '680i also gives you an in-line remote for easy operation of your favorite Apple® device. You can control your music's volume, and pause, play, or skip through your songs. Plus, a built-in microphone lets you manage calls on your iPhone®, and provides voice control on select iPod® and iPhone models. So whether you're pouring it on at the gym or some unexpected weather is doing that for you, the music will keep on pumping.

The '680i's bright yellow cord is reinforced with Kevlar® for extra durability, and the neckband is even reflective for added safety during those early-bird jogs. While the headphones keep the music coming, they're also made to let some ambient sound through — so you can still hear the traffic or a fellow athlete looking to get in some reps on the weight machine. The included cable clip means less chance of yanking the 'phones out of your ears, and a convenient pouch gives it a good home until next time.

Product Highlights:

  • earbud design
  • sweat-proof, moisture-resistant construction
  • neckband design holds earbuds securely in place
  • in-line microphone and built-in 3-button remote control for use with iPod®, iPhone®, and iPad®
  • frequency response: 18-20,000 Hz
  • impedance: 16 ohms
  • 4-foot Kevlar®-reinforced cable with stereo mini plug
  • includes carrying pouch and clothing clip
  • weight: 0.85 oz.
  • warranty: 2 years
  • Our 60-day money-back guarantee

Hands-on research

What's in the box?

Download owner's manual

  • In-ear headphones (with attached 49" cable terminated by a 3.5mm connector)
  • 1 Pair of foam ear-pads
  • Shirt-clip
  • Storage pouch
  • Instruction manual (English/ French/ Spanish/ Portuguese/ German/ Italian/ Dutch/ Chinese)

Features and Specs

Fit Style In-ear/Earbud
Earcup Type Closed
Noise-canceling No
Bluetooth No
Frequency Response 18-20k Hz
Sensitivity 120 dB
Impedance 16 Ohms
Weight 0.85 ounces
Cord Length 49
Airline Adapter Included No
iPod Control Yes
Volume Control Yes
Built-in Microphone Yes
Parts Warranty 2 Years
Labor Warranty 2 Years

Product Research


Sports Design: The Sennheiser Adidas PMX 680i sweat-proof, in-ear/neck-band headphones deliver outstanding, high-energy stereo sound during your workout.

Sweat & Water Resistant: The PMX 680i headphones utilize sweat-proof, water-resistant construction for indoor and outdoor use during any season.

Neckband: The PMX 680i's neckband vertical transducer system provides a comfortable, secure fit that won't fall out during your workout. The PMX 680i has a universal fit for any size or shape head.

Kevlar Reinforced Cable: The DuPont Kevlar reinforced single-sided cable guarantees durability and flexibility, even in cold temperatures.

In-Line Remote Control: The Sennheiser PMX 680i features an in-line remote control and microphone compatible with select iPods and iPhones. Controls include volume, skip forward or backward, fast forward or rewind within a song, play, pause, accept call, reject call, and end call. Compatible iPhone/iPods include iPhone 4, iPhone 3GS (16GB and 32GB), 2nd generation iPod classic (120GB), 3rd generation iPod classic (160GB, introduced in 2009), 2nd/3rd/4th generation iPod touch, 4th/5th/6th generation iPod nano, and 3rd/4th generation iPod shuffle.

Note: Only the in-line remote is incompatible with other iPods. Used only for listening, the PMX 680i headphones are compatible with any iPod, iPhone, and any other device with a 3.5mm headphone jack.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Sennheiser/adidas® PMX-680i Reviews

Average Customer Review:

7 reviews
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Most comfortable, Perfect for workouts and biking, be prepared for whe

Written By lonekrazylegz, Bainbridge Island, WA on Tuesday, December 11, 2012

  • "Coolness Factor"
  • Build Quality
  • Comfort
  • Noise Reduction
  • Sound Quality

Best for biking because you can still hear the traffic around you.....very important also discrete for when your in school just throw your hood up.

Pros: Remote and form fit for exercise

Cons: They will die after a bit and you will want another

Trustworthy Headset, Item is as described.

Written By DJ Auralgasm, Billings, MT on Tuesday, December 04, 2012

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Comfort
  • Noise Reduction
  • Sound Quality

This is a very well built headset. I trust the claim that states it is "sweat-proof" or "sweat-resistant" is accurate. I have been at the gym with them several times already, and when I am at the gym it is as if this headset has been submerged in sweat. The sound quality is as good as can be expected. Now that I have a headset that can outperform the output of my phone it's time to upgrade the later. For the cost I would highly recomend this headset.

Pros: Sweat-proof or sweat-resistant, durability, sound quality, comfort, variety of uses from just listening to music up to making a call.

Cons: Not wireless


Written By Pete, Chicago, IL on Saturday, August 27, 2011

These headphones were OK for a grand total of 2 months. Then, the right headphone conked out completely. Even when both headphones worked, the sound quality and volume were poor. The only thing good about these headphones is the volume/control buttons, but, needless to say, I'd much rather have headphones that worked. And our friends at Sennheiser have made it virtually impossible to place a warranty claim in a practicable manner.

This product just ain't worth the premium price; that's for sure.

PMX-680I review

Written By Harold, Los Angeles, CA on Wednesday, August 24, 2011

Crutchfield Customer Review (What's this?)

This headphones are great for running they are out of the way & very confortable, I love the attached remote to skip, forward through your ipod/iphone. if I had to pick any flows the only one would be when working out laying on benches the neckband gets in the way but if you can live with that they are great.

sennheiser PMX680i

Written By Anonymous, north carolina on Monday, August 22, 2011

Crutchfield Customer Review (What's this?)

I am a mechanic and these headphones work great, and have stood up very well. They have very good sound and the controls are a very nice feature to have since my hands are dirty most of the time so I dont have to handle my Iphone to change songs or answer calls.

Sennheiser/adidas® PMX-680i

Written By billy123, apo. ap. MARSHELL ISLAND ,.KWAJALEIN ATOLL. on Wednesday, July 06, 2011

Crutchfield Customer Review (What's this?)


Superb Headphones

Written By The dindin, Camp Marmal, Afghanistan on Tuesday, June 28, 2011

Crutchfield Customer Review (What's this?)

Immaculate headphones! I sweat profusely when working out and needed a replacement set. The ones I replaced could not keep the sweat from going into my ears. Occasionally, the sweat would make it seem as though the music was breaking. At one point, I started to think my IPOD was going out. These headphones rock and sound pretty good and I am VERY content with my purchase. The sound is sweet and bass actually more pronounced. The fit on the head is pretty good as well. You can rest assure that you will not regret this purchase.