Sennheiser HD 660 S Open Over-Ear Audiophile Headphones (Black)

$499.95 OR

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Model: 508826 UPC: 615104340503 Item: 170013

Sennheiser HD 660 S headphones Overview

If you are passionate about music you need to check out the Sennheiser HD 660 S headphones.These open-back dynamic headphones are built with the most demanding ears in mind. The lightweight and durable Sennheiser HD 660 S headphones are built for long lasting listening enjoyment. Audiophiles will be happy to hear the HD 660 S can be connected to your high resolution audio player to deliver complete reference-class fidelity. Those who still haven’t made the leap to High Res will hear drastic improvement in their audio playback. Thanks to cutting edge transducers these headphones deliver lifelike audio -- crisp bass, full, transparent mids, and clean and natural treble.

Product Information

Product highlights

  • Reference open-back headphones
  • Deep bass, full bodied mid-frequency response, and a gentle, clean and natural treble
  • New transducer design delivers lifelike listening experience
  • Includes an assortment of cables compatible with just about any device
  • Form fitting elliptical ear cups deliver long lasting listening comfort
  • Extra thick headphone padding for added comfort
  • 150 ohms
  • Frequency range: 10 – 41,000 Hz (-10 dB)
  • Weight: .57 lbs (without cable)
  • Warranty: 2 years – World Wide Stereo is an authorized dealer for every brand we sell
  • Included: World Wide Stereo 60-day guarantee and expert product support

Reference quality sound

You don’t need to be an audiophile to appreciate the sound of Sennheiser HD 660 S headphones, but don’t be surprised if you become one when you hear what these headphone can do. These open back headphones feature a newly designed transducer, a piece of sonic technology designed to lower harmonic distortion, and produce a natural soundstage, allowing you to experience your music the way the artist intended you to hear it -- clear, powerful, free of distortion.

Diverse listening possibilities

These headphones can be used with mobile high-resolution audio players or high-quality, stationary HiFi components. Whether you have the HD 660 S connected to a dedicated headphone amplifier, like the Sennheiser HDV 820 or you are hooked up to a mobile phone, these headphones deliver rich, powerful audio. Since these headphone will take all of your audio to the next level, our friends and Sennheiser included an assortment of connector cables including a 6.35 mm stereo plug, a balanced 4.4 mm Pentaconn stereo plug, and a 6.35 mm to 3.5 mm adapter.

Luxurious style and comfort

These open back headphones make a bold fashion statement, but the HD 660 S does not sacrifice style for comfort. The outside of these open back headphones are covered with metal mesh that gives you a glimpse at the sonic wizardry working inside. The soft padded earcups are large enough to comfortably fit over any ear. An adjustable padded headband keeps the HD 660 S firmly resting on your head without applying any annoying pressure. The result is a high quality, ultra comfortable, long lasting listening experience.



  • Impedance: 150Ω
  • Connector: Stereo jack plug, gold-plated 6.35mm, unbalanced, 3-pin 4.4mm, balanced, 5-pin
  • Frequency response: 10 - 41,000Hz (-10dB)
  • Maximum sound pressure level: 104dB at 1V 1kHz
  • THD - Total Harmonic Distortion: <0.04% (1kHz, 100dB)
  • Ear coupling: Over-ear (circumaural)
  • Transducer principle: Dynamic, open
  • Weight: Approximately 260 grams

What's in the Box

What's in the Box:

  • HD 660 S Over-Ear Headphones


We'd love to hear your thoughts! Please leave a review.

Customer Reviews for Sennheiser HD 660 S Open Over-Ear Audiophile Headphones (Black)

5.0 / 5.0
1 Review
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1 Star
Rated 5 out of 5
Really satisfied with these 660 S headphones. Fantastic sound and comfort at a reasonable price.
April 24, 2023
1 year ago


Customer Q & A

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Why did you choose this?
World Wide Stereo Store
good reviews. had sennheisers many years ago.
Louis S on Nov 21, 2022
chose for a gift
Lori O on Dec 12, 2018
good reviews. had sennheisers many years ago.
Louis S on Nov 21, 2022
Heard good things about these
D.J. Fan on Oct 14, 2022
chose for a gift
Lori O on Dec 12, 2018
Heard good things about these
D.J. Fan on Oct 14, 2022