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Sennheiser Adidas PMX 680i Headphones Review - YouTube
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Sennheiser CX 685 Adidas Sports In-Ear Headphones Review | Tom's Guide
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Sennheiser's 2011 headphone lineup (photos) - CNET
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Sennheiser Momentum 4 Wireless Headphones - Bluetooth Headset for Crystal-Clear Calls with Adaptive Noise Cancellation, 60h Battery Life, Customizable Sound, White | Dulles Town Center
Sennheiser and Adidas launch Sports earphone range for active audiophiles
Sennheiser HD 250BT Review | PCMag
Adidas RPT-01 Sport On-Ear Review | PCMag
