Unused pair of Sennheiser HD 660S2 open-back audiophile headphones. Legendary 600 series sound with extended sub-bass, natural mids, and wide soundstage. 300Ω impedance – ideal for hi-fi amps/DACs. Premium velour pads for long listening comfort. Includes: headphones, detachable cable, original box/packaging. Condition: Unused, opened only for photos.
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