Name: HD 660s
Brand: Sennheiser
SKU: 76774
Rating: 3.9 (62 reviews)

4.3

based on all reviews

Consumer ratings:

4.5 / 5

embraces both contemporary style and timeless elegance
The headphones are beautifully presented as usual and for the price this is
the design is good for another 20 years

It symobilizes a website link url
The power of a Mojo is simply not enough
go less expensive than entry level

Impedance: 150 Ω
Sensitivity: , 104 dB
Frequency range: 10, 41000 Hz
Acoustic design: Open
Sound output: Stereo
Style: Over-Ear
Connectivity technology: Wired

Sennheiser HD 660s - Pros & Cons

embraces both contemporary style and timeless elegance
The headphones are beautifully presented as usual and for the price this is
the design is good for another 20 years
it always stays exceptionally accurate and transparent
Sennheiser always working to improve the already so good
aural precision and great wearing comfort
a crisp bass
excellent mid-frequency response
and a gentle
the improved performance of its new transducer design
wide
expansive and superb stereo imaging
high-end audiophile performance at affordable price
sound is neutral and detailed
Good detail
solid soundstage
and clean neutral sound
The upright bass is clean and consistent
High-quality
neutral headphone with clean approachable sound quality
high quality
accurate music reproduction at an affordable price
beautiful
accurate sound
The imaging ability of these headphones is excellent
The midrange is quite forward
HD 660 S are still quite comfortable and are firmly held onto the head
the tight fit ensures a good level of wearing comfort
generous padding and silicone-covered foam making things comfortable
It features impressive levels of detail resolution and balance
tight and accurate response of the drivers
the removable cable system is dead simple and custom cables are plenty and affordable
it gives an Excellent soundstage
comfortable enough to use
light in weight they are very durable
Instrument separation is perfect
are Sturdy
Solid
and look durable
Most headphones are good a different areas
the great albums never sounded so good
midds is conveying vocals well
vocals are also great
with warmth and enough highs to sound open
660S delivers is really good
to the touch and appears to be of very high quality
an open design that allows the sound to be more natural and transparent
very tasteful and elegant
the soft and the very energetic
The mid frequencies are wonderfully clear
headphones are still eminently portable and compatible with a variety of devices
ensures these headphones can provide you with years of listening pleasure
Neutral Sound Good for neutral listening
better passive soundstage performance and more neutral bass
HD 600 sound better-balanced overall
a good audio reproduction and are comfortable enough for long listening sessions
the plastic used feels decently solid and they also have detachable cables
wonderful soundstage
stereo separation
vocal detail
and precise control of
Stunning sound
classy design
quality build
Compact
light and perfect for mobile
Strings are beautifully defined
warmer and more listener-friendly
Appealing appearance
great aluminum finish and decent comfort
sound quality
great comfort and excellent noise reduction
Perfectly balanced sound with potent bass and buckets of details
Excellent wearing comfort and high quality
Detailed
warm and open sound image with very
Nice workmanship and nice comfort
Super-defined sound image with almost complete qualities
extremely efficient
sound great for the price range
soundstage is large and coherent
great sound quality and comfort
build quality is excellent
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the highs and lows are crisp and clear
listening experiences in this price range and are durable and comfortable
great sound quality
HiFiMan will offer better value than the Sennheiser
significantly better soundstage performance and more consistent audio delivery

It symobilizes a website link url
The power of a Mojo is simply not enough
go less expensive than entry level
not everyone enjoys the same character of sound
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the clack of the keyboard is as loud as the music playing
Metallic grey plastic has been switched with black
The metal headband does perhaps clamp the earpieces a little too firmly around the head
does feel too tight
isn t overly in your face
murky
or overbearing
limited bass output
Sennheiser HD 660 S is not the best tool for the job
no shorter mini-plug cable
lacking a bit of body
some songs can be a little shouty or too bright
it might sound bizarre to compare two headphones from completely different price brackets
had used the same driver as the HD 700
mismatch in output impedance
nothing earth-shattering
do not deliver peak performance levels
noise intrusion from the outside world is relatively low
the earpieces are cushioned with a velour covering
The HD 660 S is not an embellisher
the choice of cables to be weird
HD 650 only came with the single cable and adapter
louder albeit by a small margin
in headphone audio is staggering
Twitter icon A stylized bird with an open mouth
headband and outer grill the entire body is made up of plastic
it lacks energy at the treble's end
open-back headphones are generally costly as compared to closed-back headphones
lack of energy in highs and not so good extension in lows
Bass Roll-Off is so aggressive that sometimes you miss Sub-Bass
The sound is dark
with too little detail at the top
have Bluetooth so there's no need for a battery or charging
the thick cable extends down from both cups before becoming one
5mm headphone adapter will not do for the HD 660S
microphone manufacturer fails to grab us with its first headphone model
sound a little too soft for someone's taste
there are not many headphone amplifiers with Pentaconn connectors
Limited sound pressure and deep bass
It may not display this or other websites correctly
They have weak and loose sub bass
They are not similar in sound and also have different drivers
It does not store any personal data
Bad recordings and poor playing are very noticeable with these headphones
lack of bass in the 660S
3m long cable seems excessive
the bass is awful
lack of noise isolation would make it highly impractical outside your home
force of the clamp to be a little excessive out of the box
the rotating earcups are to be missed
structures are often heavy to contain the necessary components
only their color has been changed
it is not very convenient to use with a smartphone
creaks
cracks or smells like cheap plastic
headphones seem to clamp quite tightly on the head and may feel a little uncomfortable
the open-back headphone is less controlled here
the bass is often not as pronounced as a closed pair
their bass lacks a bit of thump and is a bit muddy
feel as tight as the HD 660 S
treble lacks a bit of detail and might sound slightly veiled
their sub-bass might be lacking a bit for bass-heavy music
No cherry-picked units sent by brands

Sennheiser HD 660s - Technical Overview

	Poor	Average	Good	Excellent
Impedance	150 Ω Best: Stax SR-L500 Impedance: 145000 Ω
Weight	260 g Best: Cyber Acoustics ACM-7002 Weight: 0.11 g

Sennheiser - Video Reviews (6)

Sennheiser HD 660S Review - The New, New Reference

Sennheiser HD 660s - Full Specifications

Sound output	Stereo
Style	Over-Ear
Connectivity technology	Wired
Headset (integrated/enclosed microphone)	no

Weight	9.17 oz

Cable length	3
Type of connector	3.5mm 6.3mm
USB	no
Detachable cable	yes

Colour of product	Black
Acoustic design	Open
Attachment type	Headband

Impedance	150.0 Ω
Sensitivity	< 104
Frequency range	10 - 41000
Driver technology	Dynamic
Total harmonic distortion (THD)	0.04 %

Battery operated	no

Sennheiser HD 660s - Q&A

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Sennheiser HD 660s Sennheiser - Editorial Reviews (14)

4.6

Based on 14 reviews

Sennheiser HD 660s Sennheiser HD 660 S Over-Ear Headphone Review If it ain't broke, fix it anyway. Review By Dave Hanson

enjoythemusic.com

Sennheiser HD 660 S Over-Ear Headphone Review If it ain't broke, fix it anyway. Review By Dave Hanson

Sennheiser HD 660 S Over-Ear Headphone Review If it ain't broke, fix it anyway. Review By Dave Hanson of Enjoy the Music.com

Sennheiser HD 660s Sennheiser HD 660S review: audiophile headphones for $499

businessinsider.my

Published: 14.08.2020

Sennheiser HD 660S review: audiophile headphones for $499

Sennheiser's HD 660S open-back headphones offer impressive performance, but you'll need to invest in a good audio source to get the most of out them.

Sennheiser HD 660s Sennheiser HD 660 S Over-Ear Headphones Review

StereoNET Australia

Sennheiser HD 660 S Over-Ear Headphones Review

It's hard to believe, but Sennheiser's HD 600 were first released in 1997. They've now been manufacturing and selling this model headphone for over twenty years! Sennheiser, after all these years, has finally released a new headphone to the legendary HD 600/HD650 family: The HD 660 S. Just like it says on the box - The Legend Continues!

Sennheiser HD 660s Sennheiser HD 660 S Headphones

Reference Home Theater

Published: 17.01.2018

Sennheiser HD 660 S Headphones

The Sennheiser HD 660 S replaces the highly regarded HD 650 and brings with it a new, more efficient driver design. The new design cuts the impedance in half, making the HD 660 S an easier headphon…

The Ear

Published: 10.08.2018

Sennheiser HD660S | The Ear

“The legend continues…”, said Sennheiser, upon the release of their HD660S dynamic open-back circumaural headphone, the successor to the venerable HD650 that

Headfonia Reviews

Published: 04.02.2018

Picture Sunday - Sennheiser HD660S - Headfonia Reviews

The Sennheiser HD660S is the newest Senn headphone. We take a look at the legendary HD650 successor here in this Picture Sunday post - only on Headfonia!

Headfonia Reviews

Published: 03.04.2018

Review: Sennheiser HD660 S - Blended - Headfonia Reviews

The Sennheiser HD660 S is the latest addition to the iconic Sennheiser 6-series. Can the new HD660 S headphone live up to the fame? That and much more in this comprehensive HD660 S review. After the click

Sennheiser HD 660s Sennheiser HD 660 S Review

TechPowerUp

Published: 18.09.2018

Sennheiser HD 660 S Review

5.0

The Sennheiser HD 660 S is a direct successor to one of the most legendary hi-fi headphones of all time, the HD 650. With a price tag of $500/€500, does it have what it takes to carry on the legacy?

Sennheiser HD 660s Sennheiser HD 660S Review – A New Legend

headphone.guru

Sennheiser HD 660S Review – A New Legend

RTINGS.com

Published: 08.05.2019

Sennheiser HD 660 S Review

4.0

The Sennheiser HD 660 S are good open-back critical listening headphones. They have a good audio reproduction and are comfortable enough for long listening sessi...

enjoythemusic.com

Sennheiser HD 660 S Over-Ear Headphone Review If it ain't broke, fix it anyway. Review By Dave Hanson

Sennheiser HD 660 S Over-Ear Headphone Review If it ain't broke, fix it anyway. Review By Dave Hanson of Enjoy the Music.com