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Sennheiser HD 660s Audiophile Headphones
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Hey, I also got HD660S recently, very nice! : r/headphones
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Sennheiser HD 660 S Open-back wired over-ear headphones at Crutchfield
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HD 660S | Sennheiser
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Sennheiser HD 660 S - A Review and Brief Comparison(Amiron Home) | Headphone Reviews and Discussion - Head-Fi.org
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