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  1. Headphones

Sennheiser HD 660 S

9,4/10 (37 reviews)
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Sennheiser headphones
Sennheiser HD 660 S

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  • Current product
  • 373,-
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Type of ear cushions
  • Over-ear
  • Over-ear
Bluetooth
  • No
  • No
Noise canceling
  • No
  • No
View full comparison

Product information

Key specs

Type of ear cushions
Over-ear
Bluetooth
No
Noise canceling
No
Sound quality according to customers
Good
Carrying comfort according to customers
Good
View all specifications

Pros and cons

According to our headphones expert
  • Thanks to the frequency range of 10 to 41,000 Hertz, the sound is detailed.
  • Music sounds natural and spacious because of the open design.
  • With an impedance of 150 ohms, the headphones aren't suitable for mobile devices without a headphone amplifier.
Product Expert headphones

Description

With the HD 660 S, Sennheiser has renewed a classic. Thanks to the newly developed drivers, these headphones react better than its predecessor. The headphones sound detailed, thanks to the wide frequency range of 10 to 41,000 Hertz. This ensures that the HD 660 S is suitable for the most demanding listener, because the treble and bass are clearly distinguishable from each other. The sound sounds spacious, thanks to the open design. This makes the headphones especially suitable for home use. Thanks to the comfortable ear cups, you can easily carry these Hi-Res headphones for a whole day without your ears burning.

With the HD 660 S, Sennheiser has renewed a classic. Thanks to the newly developed drivers, these headphones react better than its predecessor. The headphones sound detailed, thanks to the wide frequency range of 10 to 41,000 Hertz. This ensures that the HD 660 S is suitable for the most demanding listener, because the treble and bass are clearly distinguishable from each other. The sound sounds spacious, thanks to the open design. This makes the headphones especially suitable for home use. Thanks to the comfortable ear cups, you can easily carry these Hi-Res headphones for a whole day without your ears burning.

Tips for using this product

Tips for using this product

Read our tips and find out all about how to set up your product and use it the right way.

View all support

Included by default

  • Manual
  • 6.3mm jack cable
  • 4.4mm Pentaconn cable
  • 6.3mm to 3.5mm jack adapter
  • Hardcase

Included by default

  • Manual
  • 6.3mm jack cable
  • 4.4mm Pentaconn cable
  • 6.3mm to 3.5mm jack adapter
  • Hardcase

Key specs

Type of ear cushions
Over-ear
Bluetooth
No
Noise canceling
No
Sound quality according to customers
Good
Carrying comfort according to customers
Good
View all specifications

Complete your purchase

Visit one of our stores, also by appointment

  • Get advice from an expert
  • View more headphones in our stores
  • We have stores in Almere, Amsterdam West, Amsterdam Zuidas, Arnhem, Breda, Den Bosch, The Hague, Eindhoven, Groningen, Haarlem, Hengelo, Leeuwarden, Leiden, Nijmegen, Rotterdam Alexandrium, Rotterdam Centrum, Tilburg, and Utrecht

Reviews

37 reviews
9,4/10 (37 reviews)

Rating

30 reviews with 5 stars

7 reviews with 4 stars

0 reviews with 3 stars

0 reviews with 2 stars

0 reviews with 1 star

Rating per section

Sound quality
9,7
Wearing comfort
9,3
Build quality
9,3
Design
9,0

Customer images

Most helpful reviews

10/10

Very good headphones

  • super comfortable
  • Clear and open sound
  • Subbass lacks some impact
  • Tony wisman
  • 4 April 2018
  • Automatically translated from Dutch
9,6/10

Top audio for the critical (home) listener

  • Incredibly good sound, from low to high top detail.
  • Large, soft shells, good adjustability and flexibility for good pressure distribution
  • Slightly tight right out of the box, requires some stretching and playing.
  • Stephan
  • 22 February 2018
  • Automatically translated from Dutch
9,6/10

Pure class! Hours of listening pleasure.

  • comfort:: is great
  • Sublime sound
  • No
  • D. van der meer
  • 10 November 2019
  • Automatically translated from Dutch
9,6/10

Could be better

  • Clear Mids /Highs beautiful Soundstage
  • light
  • Too little bass, even with a separate AMP or DAC
  • Chris l
  • 30 November 2020
  • Automatically translated from Dutch
8,8/10

Top class headphones

  • Didier desmyter
  • 18 November 2020
  • Automatically translated from Dutch
9,2/10

Best headphones I've ever bought!

  • Sound is really great!
  • All the connections you need are present
  • Openback so some sound comes out to the outside world but not terribly much
  • Wibbe jogchum wiersma
  • 24 May 2021
  • Automatically translated from Dutch
8,4/10

Great headphones, no braided cable.

  • Sound quality
  • Comfort
  • Cable quality
  • Ellard de koeijer
  • 30 March 2022
  • Automatically translated from Dutch
9,6/10

As good as essential open-back headphones

  • Reliable warm sound
  • Super sleek design
  • Presses lightly against my auricle
  • Wibo
  • 8 April 2021
  • Automatically translated from Dutch
10/10

Great headphones.

  • sit well
  • Nice spatial sound
  • Pricey
  • Monique hoedemaker
  • 22 June 2020
  • Automatically translated from Dutch
10/10

For me, these are headphones that do what they promise.

  • sound
  • wearing comfort
  • cable could be a little longer
  • Bram vandenbussche
  • 21 March 2020
  • Automatically translated from Dutch
10/10

Very good headphones

  • super comfortable
  • Clear and open sound
  • tight bass
  • Subbass lacks some impact

Of all the headphones I've tried, the hd660s is the best for me in terms of wearing comfort and sound quality.
I also have an HD600 and while this one is also fantastic, it takes it up a notch. What is immediately noticeable is that the 660s is a bit faster, which in my opinion gives you more space between the different instruments in the music. And it all sounds a little fresher and clearer. The hd600 has a more relaxed character, which can of course also be nice sometimes, but it sometimes makes me a bit sleepy. The hd600 is by the way the more "neutral" of the two with regard to the frequency response, but the difference is not very big.
one more thing to mention is that the 660s is a bit easier to control.
I use a dragonfly red for both headphones and with the 660s I have to turn the volume down a bit. it makes a difference of about 4 to 5 dB. It can also be controlled with a telephone, although I do recommend using a dac/amplifier to get just that little bit more out of it.

  • Tony wisman
  • 4 April 2018
  • Automatically translated from Dutch
9,6/10

Top audio for the critical (home) listener

  • Incredibly good sound, from low to high top detail.
  • Large, soft shells, good adjustability and flexibility for good pressure distribution
  • 'despite' open construction a nice, tight bass.
  • Slightly tight right out of the box, requires some stretching and playing.

I have already written 'love at second sight' elsewhere. After experiencing 'good' sound for the first few days, it took a while before I could appreciate the real added value of a top set like this, especially after you switch back to some ~200 euro models it suddenly becomes painfully clear how big the gap between 'good' and 'very very good' (this unit). The ease with which this unit manages to stitch together every detail even in faster pieces of music is impressive. It sounds very (but not extremely) spacious, neutral from bass to the high end, and presents everything but the most extreme music styles excellently.

Build quality is neat, finish is neat, comfort is top after you first stretch it and wear it for days; straight out of the box it was just a little tight. Pillows themselves are excellent, pressure distribution is excellent. We don't see much room for improvement there, only in the secondary matters: a storage bag or some extra ear cushions would have been welcome for this amount. Also keep in mind that the open construction leaks a lot of sound, and does not dampen the environment: this is really a model to enjoy at home, not for the street.

499 euros is quite money, and for that it is crucial that we really get something back. Now about two weeks on the road with this model, it feels like you are only experiencing the beginning of this set's capabilities, and that is already impressive. For a young, inexperienced listener or lovers of 'just a nice beat' you have plenty of affordable alternatives, but for the critical listener who wants to be able to distinguish the finest detail? Then we see that the HD 660 S is really several classes above mainstream.

  • Stephan
  • 22 February 2018
  • Automatically translated from Dutch
9,6/10

Pure class! Hours of listening pleasure.

  • comfort:: is great
  • Sublime sound
  • Easier to control compared to other 600 series
  • No

One word: great! The HD660S is pure class. I already had the HD650, which is of course also a winner. But because I recently listened to music indoors (inconvenient for outside because of the open sound box) portable, I had been craving the HD660S for a while. This is because of its lower Ohm of 150. I use the HD660S together with the Dragonfly cobalt (dac/amplifier) on the laptop and Iphone/Ipad. The dragonfly cobalt controls the HD660S with ease. Super tight and spacious sound. I'm still a big fan of the HD650, but if I'm honest, the HD660S surpasses the HD650 on almost all fronts. The HD660S is a lot more musical and gives the music just a little more life and spice.

  • D. van der meer
  • 10 November 2019
  • Automatically translated from Dutch
View all 37 reviews

Insure your headphones

You can select one of the Backup Plans below in your shopping cart. It will protect your brand new headphones against damage and/or theft.

Sennheiser HD 660 S
  • Backup Plan Damage - Cancellable monthly
    4,99 per month
  • Backup Plan Complete - Cancellable monthly
    6,49 per month
  • 2-year Backup Plan Damage
    61,00 one-time payment
  • 2-year Backup Plan Complete
    75,00 one-time payment

Specifications

Product

Product number
802707
Manufacturer code
508826
Brand
Sennheiser
Warranty
2 years
Processing of your defect
Via Coolblue
Old product returned for free
Yes

Physical properties

Weight in grams
260 g
Color
Black
Material
Plastic
Built-in microphone
No
Intended for
Consumers

Sound according to expert

Tested by expert
No
Equalizer
No

Sound

Sound reproduction
Stereo
Impedance
150 O
Hi-Res audio
Yes
Volume limit
No
Active headphones
No
Noise canceling
No

Connection

Bluetooth
No

Cable

Detachable cable
Yes
Ribbon cable
No
Coil cable
No
Braided sleeve
No
Remote in cable
No

Quality

Hi-Res audio
Yes
Sound quality according to customers
Good
Carrying comfort according to customers
Good

Resistance

Water-resistant
No

Casing

Type of ear cushions
Over-ear
Types of design
Open
Foldable
No
Rotatable ear cups
No
Ear cushion material
Fabric
Remote control on ear cups
No

Accessories

Extra headphone cables included
Yes
Headphones adapter included
Yes
Airplane adapter included
No

Awards

Best tested
No

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Sennheiser HD 660 S
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