Sennheiser HD 660S2 Wired Over-Ear Headphones

Dive Deeper into Your Music Enjoy your music on a totally new level with the HD 660S2 from Sennheiser, the...
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Estimated to be delivered on 12/01/2022 - 15/10/2022.

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Dive Deeper into Your Music
Enjoy your music on a totally new level with the HD 660S2 from Sennheiser, the improved successor to the HD 660S with audiophile specs and greatly enhanced bass response. The HD 660S2 delivers a deeply moving auditory experience thanks to features like an optimized steel mesh surround, improved transducer airflow, and lighter weight, higher impedance aluminum voice coils, which deliver more impact and extended sub-bass performance, so you can hear the lowest pianos notes and the deepest bass drum hits without sacrificing comfort or natural sound reproduction.

The open-back design and ultrasoft velour earcups of these over-ear headphones ensure extreme comfort during extra-long sessions, and perfectly channel-matched drivers within ±1 dB provide a truly intimate, high-fidelity listening experience. The HD 660S2 comes with two detachable cables in 1/4" unbalanced and 4.4mm balanced flavors, and the headphones also include a handy 1/4" to 3.5mm adapter and a convenient carry pouch.

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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


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When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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