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Best Buy: Sennheiser Adidas Sports Behind-the-Neck Headphones PMX-680i
Sennheiser-Adidas CX 680 (Review) | Skatter
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Sennheiser-Adidas CX 680 (Review) | Skatter
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Review: Sennheiser /Adidas PMX 680 | WIRED
Sennheiser CX 680 Sports Review | PCMag
Sennheiser CX 680i Sports Earphones - THE ZINE
Sennheiser-Adidas CX 680 (Review) | Skatter
