Why You Should Get It
  • Reference-class open-back, dynamic headphone employing new and improved transducers delivering low harmonic distortion
  • Transducers are hand-selected for precise ( 1 dB) left / right matching tolerance insure exceptional accuracy and presentation of stereo spatial characteristics
  • 150-ohm nominal impedance allows direct connection to home and mobile Hires audio devices. Cutting-edge Sennheiser technology
  • Para-aramid reinforced, detachable cables employ high conductivity OFC copper to insure signal integrity with very low handling noise
  • Supplied with two connection cables: One with a 6.35 mm stereo plug, the other a 4.4 mm Pentaconn balanced stereo plug. Also included is a 6.35 mm to 3.5 mm adaptor. Connectivity Technology: Wired 6.35 mm / 4.4 mm Pentaconn
Warranty
2 years (international)
In The Box
  • HD 660 S
  • Cable with 6.35 mm Plug
  • Cable with 4.4 mm Pentaconn Plug (balanced)
  • Adapter 6.35 to 3.5 mm
  • Manual
  • Storage Box

A New Audiophile Versatility
The new HD 660 S lets you enjoy sophisticated audiophile sound in even more listening situations. The successor of the legendary HD 650 excels with the improved performance of its new transducer design. Thanks to its lower impedance, it delivers reference-class sound also when connected to hi-res mobile players, thus offering much greater versatility. The HD 660 S is an elegantly designed piece of high-quality engineering that indulges the demanding listener with aural precision and great wearing comfort.

Sound for the Passionate Music Enthusiast
Made for the demanding listener, the HD 660 S surpasses the exceptional performance of its predecessor, the legendary HD 650. With a crisp bass, excellent mid-frequency response, and a gentle, pleasantly natural treble, the HD 660 S has an expressiveness that immerses you in every emotion and nuance of music. Still, it always stays exceptionally accurate and transparent.

Cutting-edge Sennheiser Technology
The HD 660 S features a new transducer design developed by Sennheiser. This results in improved control of the diaphragm movements thanks to a specially manufactured precision stainless steel fabric, which is adapted to the contour of the diaphragm. Extremely light aluminum voice coils ensure the highest impulse fidelity. The transducers are carefully selected and paired by hand to ensure consistently narrow (±1 dB) tolerances.

Supreme Connectivity
The HD 660 S has been created to enjoy music in supreme quality and from many different audio sources. Naturally, the HD 660 S reveals its full potential when it is connected to the balanced outputs of a dedicated headphone amplifier such as the HDV 820 or to the balanced output of a mobile digital audio player. Accordingly, it comes with a choice of cables for just about any occasion. All cables are made of highly conductive OFC copper, featuring very low handling noise and sturdy para-aramid reinforcement.

Designed for High-end Comfort
Everything about the HD 660 S makes listening a pure pleasure – not least its strong yet lightweight open construction. The elliptical ear cups are shaped to follow the anatomy of the ear, while thick padding on the headband and the replaceable ear cushions guarantee hours and hours of listening in supreme comfort.

The Look of Sophistication
The pure and effortless sound of the HD 660 S is reflected in its new matte black and anthracite design. It is a high-end aesthetic that embraces both timeless elegance and contemporary style – uncompromising in its craftsmanship, like everything about the HD 660 S.

 
 
Product Availability Discontinued
Product Type Headphone
Style/Type Over-Ear (circumaural)
Features High-Res Audio Certified, Line-in, Line-out
Frequency Response (Hz) 10-41, 000 Hz (-10dB)
Impedance (Ω) 150 Ω
Total Harmonic Distortion (THD) <0.04% (1 kHz, 100dB)
Microphone None
Colour Black
Product Weight (g) 1000
Warranty 2 years (international)
Package Contents
  • HD 660 S
  • Cable with 6.35 mm Plug
  • Cable with 4.4 mm Pentaconn Plug (balanced)
  • Adapter 6.35 to 3.5 mm
  • Manual
  • Storage Box
Additional Tech Specs

Refer to Official website for Full Technical Specifications

If you're based in Singapore

  • spend $300 or more for free doorstep courier delivery.
  • add a few more bucks, for even quicker prioritised delivery.
  • self-collection is possible at our Showroom, based in Tai Seng. Find out where, and how to get to us here.
  • and yes, you may arrange your own 3rd party logistics to pickup your purchases on your behalf.
    Grab, Lalamove, GoGoX services are welcome.

 


 

Friends from Overseas, 

  • we do ship internationally.
  • shipping fees will be displayed during checkout.
  • do be aware of import tax/VAT that may apply.

 

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A New Audiophile Versatility
The new HD 660 S lets you enjoy sophisticated audiophile sound in even more listening situations. The successor of the legendary HD 650 excels with the improved performance of its new transducer design. Thanks to its lower impedance, it delivers reference-class sound also when connected to hi-res mobile players, thus offering much greater versatility. The HD 660 S is an elegantly designed piece of high-quality engineering that indulges the demanding listener with aural precision and great wearing comfort.

Sound for the Passionate Music Enthusiast
Made for the demanding listener, the HD 660 S surpasses the exceptional performance of its predecessor, the legendary HD 650. With a crisp bass, excellent mid-frequency response, and a gentle, pleasantly natural treble, the HD 660 S has an expressiveness that immerses you in every emotion and nuance of music. Still, it always stays exceptionally accurate and transparent.

Cutting-edge Sennheiser Technology
The HD 660 S features a new transducer design developed by Sennheiser. This results in improved control of the diaphragm movements thanks to a specially manufactured precision stainless steel fabric, which is adapted to the contour of the diaphragm. Extremely light aluminum voice coils ensure the highest impulse fidelity. The transducers are carefully selected and paired by hand to ensure consistently narrow (±1 dB) tolerances.

Supreme Connectivity
The HD 660 S has been created to enjoy music in supreme quality and from many different audio sources. Naturally, the HD 660 S reveals its full potential when it is connected to the balanced outputs of a dedicated headphone amplifier such as the HDV 820 or to the balanced output of a mobile digital audio player. Accordingly, it comes with a choice of cables for just about any occasion. All cables are made of highly conductive OFC copper, featuring very low handling noise and sturdy para-aramid reinforcement.

Designed for High-end Comfort
Everything about the HD 660 S makes listening a pure pleasure – not least its strong yet lightweight open construction. The elliptical ear cups are shaped to follow the anatomy of the ear, while thick padding on the headband and the replaceable ear cushions guarantee hours and hours of listening in supreme comfort.

The Look of Sophistication
The pure and effortless sound of the HD 660 S is reflected in its new matte black and anthracite design. It is a high-end aesthetic that embraces both timeless elegance and contemporary style – uncompromising in its craftsmanship, like everything about the HD 660 S.

 
 
Product Availability Discontinued
Product Type Headphone
Style/Type Over-Ear (circumaural)
Features High-Res Audio Certified, Line-in, Line-out
Frequency Response (Hz) 10-41, 000 Hz (-10dB)
Impedance (Ω) 150 Ω
Total Harmonic Distortion (THD) <0.04% (1 kHz, 100dB)
Microphone None
Colour Black
Product Weight (g) 1000
Warranty 2 years (international)
Package Contents
  • HD 660 S
  • Cable with 6.35 mm Plug
  • Cable with 4.4 mm Pentaconn Plug (balanced)
  • Adapter 6.35 to 3.5 mm
  • Manual
  • Storage Box
Additional Tech Specs

Refer to Official website for Full Technical Specifications

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Sennheiser HD 660 S Over-Ear Headphone
2 years (international)
S$829.00
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