Sennheiser HD 660S headphones in excellent condition — no marks, fully functional, and well cared for. Comes complete with the original box, stock cables, 6.35mm to 3.5mm adapter, and a premium Janjunsi upgrade cable with interchangeable 2.5mm, 3.5mm, and 4.4mm plugs. These are legendary open-back headphones known for their natural, balanced sound and wide soundstage — perfect for critical listening or pure enjoyment.
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