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Ultrasone Performance 880 S-Logic Plus Surround Sound Professional Closed-back Headphones with Transport Case | Headphone Reviews and Discussion - Head-Fi.org
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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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