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Sennheiser HD 660S headphones review
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Amazon.com: Sennheiser Consumer Audio HD 660 S - HiRes Audiophile Open Back Headphone
![Sennheiser HD 660 S [OpenBox - Refurbish]](https://cdn11.bigcommerce.com/s-kpvfihx4zs/images/stencil/1280x1280/products/262/789/6601__06685.1625248957.png?c=1 "Sennheiser HD 660 S [OpenBox - Refurbish]")
Sennheiser HD 660 S [OpenBox - Refurbish]
