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Amazon.com: Sennheiser HD 800 S Open-Back Audiophile Headphones and HDV 820 Reference Headphone Amplifier/DAC Bundle : Electronics
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Amazon.com: Sennheiser HD 800 S Over-the-Ear Audiophile Reference Headphones - Ring Radiator Drivers With Open-Back Earcups, Includes Balanced Cable, 2-Year Warranty (Black) : Electronics
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Sennheiser IE 800 S In-Ear Audiophile Reference Headphones - Sound Isolating Ear-Canal Fit With XWB Transducers and D2CA Technology, Detachable Cable, Includes Balanced Cables, 2-Year Warranty (Black) : Electronics - Amazon.com
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