The MX 686Gs nonetheless sound better than any other sports headphones I've used. I'm a big fan of bass, and the MX 686Gs deliver nice, thumpy bass without going overboard and muddying up the tracks. Mids are dynamic, treble is clear (although it could be a bit brighter), and the different levels sound great together. While the mix isn't perfect, it's very good for a pair of headphones that also lets you hear an oncoming car during your outdoor run.
Should you put a pair in your gym bag?
It's easy to overlook boring, wired sports headphones when there are so many new models with intriguing new features crowding the market, but Sennheiser's MX 686G Sport earbuds shouldn't be ignored, especially if audio performance is your number-one criterion. You won't feel as though you made too many compromises in your quest for earbuds that can stand up to your exercise regimen.
This review was published as part of a roundup of fitness earbuds. Click here to read the accompanying buyers guide and find links to the other three products reviewed at the same time.
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