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Item#: 9SIA0AJ12K4220

Sennheiser Adidas Sports Earbuds with Volume Control and Earfin Holding System (CX 680)

  • 2 year warranty
  • Sweat & water resistant
  • Secure fit in-the-ear canal

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Can you remember the last time you had a proper workout without any disturbances from the blaring gym radio, falling earbuds or clatter of machines? The Sennheiser/adidas CX 680 sports earphones will change that on the first listen. These sweat-proof, noise-isolating ear-canal 'phones deliver outstanding, high-energy stereo sound while blocking out up to 20 dB of gym noise.

The exclusive EarFin provides a comfortable, secure fit that won't fall out during your workout. Further, the CX 680 can be adapted to fit ANY ear using the supplied fit kit. This will ensure long-term comfort and exceptional isolation to enhance sound quality and concentration. A convenient volume adjuster keeps you in control of your tunes while a detachable extension cable lets you position your MP3 player where you want it. The DuPont Kevlar reinforced cabling guarantees durability and flexibility where other sport headphones can't - even in cold temperatures. The sweat-proof, water-resistant construction lets you go your hardest during any off-season.

  • newegg CES Innovations Award The CX 680 sports earphones, which have won the prestigious CES Innovations Award, were engineered on legendary Sennheiser/adidas performance to provide energizing, high-output sound that keeps you running.
  • newegg EarFin Holding Mechanism for a comfortable and secure fit An optimal and secure fit in the ear-canals is assured with Sennheiser's EarFin holding system as well as the different sizes of ear adapters (included). By sitting snug in the ear canal the earphones also offer effective insulation against surrounding noise.
  • newegg Extremely durable cable DuPont Kevlar reinforced cables are ultra-durable and flexible even in cold temperatures. The CX 680 also includes a detachable extension cable with clothing clip and volume control to enhance wearing comfort and eliminate tangles.
  • newegg Sweat- and water-resistant A completely new protection system against moisture not only effectively repels sweat but also protects the internal components of the earphones against rain water. With the ability to withstand even the toughest training sessions, the CX 680 is ideal for indoor and outdoor use during any season.

Learn more about the Sennheiser Electronic corp. CX680

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 720 days
  • Limited Warranty period (labor): 720 days
  • Read full details

Customer Reviews of the Sennheiser Electronic corp. CX680

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  • Amanda D.
  • 7/15/2014 12:03:36 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsIf it weren't for the cables...

Pros: Pros: The sound from these headphones is rather good for the price. They are not uncomfortable once you find the right earfin/earbud combination for your ears. With how good a fit they are, any external sound is incredibly dampened, if not eliminated. They don't slip when jostled.

Cons: The cable situation is a bit frustrating. The earbuds come with a cable measuring a little over two feet, and then an extension cable is included, also a little over two feet. The extension cable comes with a rather bulky volume control box for being a "sport" model, and it comes with a clip to slide onto your clothes to help keep it steady, although it doesn't grip tight enough for rougher exercise. These headphones would have been perfect if the cable would have been 4 feet with volume control built in and none of this extension cable nonsense.

Other Thoughts: Since the volume control on the extension cable is bulky and the extension cable is basically required for the cord to be long enough for my use, I've started hooking the cord over my ears, and this seems to eliminate any downward tug from a bouncing volume control if it comes unhooked. To Adidas/Sennheiser: these are pretty awesome earbuds, but maybe you guys could find a more elegant solution to the extra cable and volume control situation.

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  • Samuel D.
  • 2/24/2014 5:50:46 PM
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsGreat sound, bad quality for a "sport" headphone

Pros: The sound on these is great. Good bass, clear highs, one of the better pair of earbuds I've owned. The cable is long and the volume control has a plug so you can lose 2 feet of cable if you wear your phone/mp3 player on an armband. They're pretty comfortable, too, and the earfin system keeps them snug in your ears during running or other strenuous activity.

Cons: The durability on these headphones is a serious issue. I was smart to purchase the extended warranty, as I've had to send them in 4 times in the past 18 months due to losing sound in one or both earbuds. It's always due to the connector at the volume control too-must be a weak point in the design of these.

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  • Harris A.
  • 5/8/2013 11:24:03 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsFantastic Product

Pros: Decent sound for the price
Stay in ear with the correct fittings
Very durable

Cons: Might take some personal habit changes to make them work for you
Volume control is the weak link in this chain

Other Thoughts: Used these for lifting, running, and crosstraining for the past 18 months. Was very happy with the sound compared to other sport headphones. Was more than pleased (read relieved) that they actually stayed in my ears during activity once I tested out a few different fitting pieces to find the correct ones. Note that I only used the short part of the cord attached to an ipod nano clipped into my shirt collar under my chin. The volume control went on the fritz between 6 to 12 months in so I ditched it and never looked back.

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  • Addam T.
  • 10/23/2012 11:01:21 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsGood while they lasted

Pros: These come with a good assortment of tools to customize the fit to your ear. They fit comfortably and don't slip out.

Cons: Casing to one of the earphones broke within 3 months of very light use. I would not expect this from sport headphones.

Volume control placement on the cord is very poorly designed. Should either be a bit lower or much higher. Weight of volume control can pull headphones out of ear if the wire isn't clipped to your shirt.

Other Thoughts: They friggen broke.

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  • Robert S.
  • 9/19/2012 4:50:45 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggs

Pros: I liked the idea of the fins and still do but the plastic seemed brittle around both ear buds and broke away in small pieces. So now I'm still using them along with another set I had purchased from Sennheiser via newegg that were also labled Sports, these were ones that formed around the ears and were great till the plastic that went aroundthe ears fell apart leaving me with just the wire. I even tried a bit of Duck Tape to help support the parts of wire that wrapped around the ear. Both items were great ideas, that they have had problems with plastic. Excuse my rambling, this being my 1st review.

Cons: weak support material on ear pieces.

Other Thoughts: After all that, I have to say I will continue to buy products from both Newegg and Sennheiser, as I have enjoyed many 5 star purchases in the past.

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  • randal c.
  • 8/31/2012 3:20:36 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsimpressive sound for the money

Pros: This product has preformed as advertised. The ear buds stay put during biking, hiking and cutting the lawn. The frequency response is respectable and with a little tweaking of my iPod I was very pleased with the end result.

Cons: none so far !

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5 out of 5 eggsSennheiser Addidas Sport Earbuds

Pros: Great sounding headphones, extremely comfortable in the ear. I really like the volume adjustment and the length of the overall wires. They are stylish, sound great and feel great in your ear, before you realize it you dont even know you have them in your ears.

Cons: Headphone jack/plug could be straight rather than a 45 degree angle or L shape. Otherwise nothing else that I can see thus far.

Other Thoughts: Overall I havent had these very long but from past experiences with other brands so far I am really happy with these Earbuds. The sound quality for the money is out of this world and the comfort as well.

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4 out of 5 eggsGood but not Great

Pros: Sound quality is excellent. Better than I expected since I'm a bit of a bass head. Although they aren't the best IEM's I've heard, they do a good job at giving me the sound I want without hearing everything around me at the gym. They have many different fit selections making them very comfortable in the ear, both on the inner ear section as well as extra sizes for the outside ear. The top section also disconnects at the audio control sensor in case you happen to catch the cord on something while working out.

Cons: I would think that most vigorous runners would have a little problems with keeping these in. The cord is ample length, but that can also be a bit of a problem. The cord may be too much length for some. Also, the material that the cord is made out of isn't as nice of quality as I would like, but that is a sacrifice you make to get a sweat/water resistant pair of workout IEM's.

Other Thoughts: All in all I was VERY impressed. I went into these thinking they would be mediocre. Sennheiser is a brand I trust, and that trust was not broken on this purchase. Would buy again, even if not for sport use. Better cord material would take this to a 5 egg review.

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4 out of 5 eggs

Pros: Stay in ear, very comfortable, great sound quality, versatile

Cons: The round rubber piece (not the fin) kept falling off up until the point that these headphones are now useless to me. I am left only with freakishly large ones.

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  • Michael C.
  • 11/20/2011 10:12:44 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsI'm torn

Pros: They are light and more conformtable than I thought.

They dont fall out of my ear as long as I use the clip included and clip the cord down to my collar. That has more to do with the con I noted below.

Cons: The cord it comes with is too short for my monkey arms (bad part about being tall). The extension cord it comes with is too heavy and long. Really wish the original cord was at least 3-5 inches longer. Can't please us all I guess.

Other Thoughts: I like them, really do.

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