HD 660S Sennheiser headphones

HD 660S Refurbished

The perfect blend of power and control.

Accessories and Cables
2 years manufacturer warranty
30-Day Free Return
Limited Stock

Certified Refurbished

Products that have been tested, checked, and thoroughly inspected to meet the same high-quality standards as our new products.

The powerhouse open-back headphone

Connects you to the deepest corners of your music collection.

A Direct Connection To Your Music

Known for their engaging signatures and liquid-smooth response, HD 660S predecessors HD 650 and HD 600 shattered performance barriers in the audiophile headphone category.

From Our Ears To Yours

In just one listen you will understand why the HD 660S is so special. Thousands of listening sessions later its purpose is even clearer.

Meshing Together

The steel mesh found on the HD 660S drive unit is interesting in design but most impressive when it comes to performance.

HD 660S sennheiser

Capability, Meet Versatility.

Today’s audiophile has more component choices than ever.

Handled with care

Every HD 660S has experienced a matching regimen to mate each transducer to its opposite-channel counterpart.

It's all about connection

We packed your HD 660S with a versatile set of essential cables, each one impedance-matched with ultra-low capacitance.

  • Hi-fidelity sound
  • Open-back design
  • 42mm transducers
  • Luxurious comfort
  • Detachable cable


Article number (SKU)
Frequency response (speaker)
9 Hz - 41,500 Hz
Sound pressure level (SPL)
104 dB (1 V)
150 Ω



Accessories & spare parts

We are committed to the longevity of our products.

  • CH 660 P
    CH 660 P

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