Sennheiser HD6XX
- LABB66267
- Approved
Sennheiser HD6XX
Sennheiser HD660 S2 Open-Back Headphones
Selling a like-new Sennheiser HD 660S2 open-back audiophile headphones in excellent condition. Lightly used, fully functional, and very well cared for.
Condition:
Like new – no cracks, dents, or functional issues
Ear pads and headband in excellent shape
Adult-owned, smoke-free environment
Features:
Open-back design with wide, natural soundstage
Detailed, balanced sound with improved bass over the 660S
300-ohm impedance (recommended with a headphone amp)
Extremely comfortable for long listening sessions
Included:
Headphones
Original cables 6.35mm
Only selling due to lack of use. Ships fast and securely.
Used condition
- Removed from the retail packaging/box. A charger is not required.
- All items must be fully functional and meet our criteria for sale
Seller Damage Description
Flawless like new condition open box.
Free Shipping
- Seller ships from Denver, CO
- Ships in 2 business days or less with tracking and insurance
- Seller not required to ship internationally
Returns and Refunds
- Items received not as described shall be returned to the seller for a prompt refund
- Swappa Return and Refund policies apply to all listings
Payments and Taxes
- Seller accepts PayPal for payment
- Swappa is required to calculate, collect, and remit sales tax on behalf of sellers in specific states.
Listing Metadata
- Date Created: Jan. 28, 2026
- Date Updated: Jan. 28, 2026
- Date Expires: Feb. 7, 2026
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