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Sennheiser CX 680 Sports Review | PCMag
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BMW Group DesignworksUSA Translates Mobility into Dynamic and Emotive Designs for Earphones
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Review: Sennheiser /Adidas PMX 680 | WIRED
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Sennheiser/Adidas MX 680i Sports Earbuds for iPhone & iPod Review - The Gadgeteer
Sennheiser-Adidas CX 680 (Review) | Skatter
