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Sennheiser CX685 Adidas Sports In-Ear Headphones

4 Review(s)
  • Bring earplugs CX 685 SPORTS, enjoy the sweat, climb the ladder bar health

Train and redefine your own physical limits with the CX 685 SPORTS ear-canal phones featuring the comfortable and secure Slide-to-Fit holding mechanism. The ear canal coupling ensures a high level of noise attenuation, so you will not be distracted by the harsh clanking of the weight machine nearby while pressing your last rep of your bench press routine. Boasting Para-Aramid reinforced cables, matched with strain relief and parts made of flexible, shock-absorbing material, this pair of ear-canal phones are about as tough and intense as your gym workout.


Detailed Parameters
Frequency response: 18 - 20000 Hz
THD (total harmonic distortion): <0.5% (1 kHz, 100 dB SPL)
Sound pressure level (SPL): 120 dB
Impedance: 16 Ω
Plug: 3.5 mm (straight)
Cord Length: 1.2 m (symmetrical)
Wear form: Ear
Transducer principle: Dynamic

Packing List
CX485 headphones,
Ear adapters (S / M / L),
Storage bag,
Ear cleaning cotton,
Cleaning rod


Packing List

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Jun 14, 2013 6:02:12 PM
I bought two of these, one for my husband and one for me, for running and working out. Once in, the headphones stay in, it's a comfortable fit
and the sound it good. It comes in different sizes. Small, medium and large, so it should fit most ears. I'm happy with my purchase and I would
recommend these headphones to others.
shane persaud
Jun 14, 2013 6:01:39 PM
First off, my goal was find an ear-bud that doesn't fallout. I run a lot and I hate ear-buds that pops-out while I am hitting my stride because it unnecessarily ruins the whole flow and all ear-buds I have tried, prior to the cx685,always pops-out while running or during working-outs.

In fact, I had given up on ear buds altogether and moved on to the Koss Porta Pros over-the-head headphones, which was very light, but was very uncomfortable for running and working-out for a long period of time (even though they stayed in place, they felt like a vice grip on my head).

I compared the CX685 to my other earbuds (to reference sound quality even though those are not sports models) which included a Sony Mdr Ex310 LP, Klipsch S4 Image and Klipsch S4I reference, Sennheiser CX 880 and Bose IE2 playing the same song on my Sansa Clip, Cowon D2, Cowon s9 and I thought the bass were more than sufficient and not over powering. The bass in the Klipschs were tight and well defined, in Ex310 LP had more boom to it but never got muddy, Bose IE2 was very good, Sennheiser cx880 was excellent, and cx685 was surprisingly in the middle of all these earbuds.

At first, I was disappointed with the sound but after a week of burning in. It sounded amazing and now I am using this for everything.

Also, you can adjust and tweak your MP3 player settings (Equalizer, bass,treble etc) for better sound. For those who use those Iphones and Ipods and android devices for playing music, they are sound apps that will greatly improve your music and allow advance adjustments beyond the typical Iphone adjustments.

Also, if you want great music at a excellent price for 30 bucks, try the Sansa clip. It's quite small n good for the gym n running but the sounds for the price is top notch. Then there are Cowons and Sony mp3 lines of players.
Overall sound quality is very decent.

-Once in, stays in
-2 years warranty
-Great Sound Quality for what it is (don't expect top notch audiophile music in a sports headphones but its above average)
-Blocks out sound 85-90% (be-careful when running)

-Takes about a week to burn-in ( I was going return it because it sound tinny and weak at first but after the burn-in, its amazing)
- Takes some time to got get used to the design (sometimes I thought it was going to fall out but never did)
-Fins are changing shape (so far haven't affect the ear buds ability to stay in)
-Price: I thought it was kind of overpriced ( I paid 60 including shipping)
Jun 14, 2013 6:00:54 PM
These are probably the best workout headphones I have ever used. I've used Nixon Whip, Koss PortaPro, Skullcandy FMJs and a few others and these are hands down the best. They fit nicely in your ear and have a cool extension and the tip that lightly presses against the inside of your ear to keep them in place. Very good sound cancellation and fit. You might want to take them out every 1/2 hour or so if you like to wear them tightly. There is no mic or in-line control which doesn't bother me and the cord is very light. These don't have much booming bass but the sound is great and these can get really loud without any distortion. I highly recommend them.
Jun 14, 2013 6:00:26 PM
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.