Sennheiser Adidas OMX 680i Sports earphones

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We really like Sennheiser's collaboration with Adidas, and think it has delivered a sports-friendly and sturdy product. The earphones are sweat- and water-resistant, and the cable is encased in Kevlar for greater strength and durability. One of the main features of the OMX 680i Sports earphones is an in-line remote that was designed especially for the iPhone 3GS, iPhone 4 and Adidas' own miCoach. It is also compatible with iPods, and features a built-in microphone so you can answer phone calls. The unit has rubber buttons for volume and skipping tracks as well as a play/pause button.

The first time we put on the earphones, we were impressed with how light the headphones were — they only weigh 18 grams. However, we found that adjusting the clips and fitting the earbuds was a bit of a challenge initially. The earphones do get slightly uncomfortable after a couple of hours, but unless you're running a marathon this shouldn't be a huge problem. The sound quality of the earphones was generally acceptable: they have clear treble, but we wanted more power in the bass department. The headphones do not do a very good job of providing isolation from ambient noise, which might be annoying in loud outdoor settings. We tested the microphone on the in-line remote and encountered no problems with voice quality.

The OMX 680i Sports earphones from Sennheiser and Adidas are a solid option if you require a sturdy pair of headphones for outdoor use or exercise. They lose some points for lack of comfort and fiddly insertion, but overall they are well designed and produce reasonable sound.

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