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 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.
We want to make sure your order arrives safely, quickly, and hassle-free. Below you’ll find everything you need to know about our shipping process.
- Orders are typically processed within 1–2 business days (excluding weekends and holidays).
- You’ll receive a confirmation email once your order has shipped, including tracking details.
- Shipping rates are calculated based on your order total, weight, and delivery location.
We hope you are happy with your purchase; but in the event you are not pleased with your purchase please read the following:
- Items may be returned within 14 days of delivery in original condition and packaging.
- A restocking fee of minimum 15% may apply to opened or non-defective items.
- Item must be factory reset or password unlocked before return.
- Refunds are issued to the original payment method once the item is received and inspected.
- Shipping fees are non-refundable, and return shipping costs are the customer’s responsibility (unless the item was defective or incorrect).
- For complete details, please see our full Return & Refund Policy.