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Sennheiser Consumer Audio HD 660 S - HiRes Audiophile Open Back Headphone

4.7 4.7 out of 5 stars 1,962 ratings

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Single
Brand Sennheiser Consumer Audio
Model Name HD 660 S
Color Black
Form Factor Over Ear
Connectivity Technology Wired

About this item

  • 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. Contact pressure: 6.0 N - 1 N
  • Para aramid reinforced, detachable cables employ high conductive OFC copper to insure signal integrity with very low handling noise
  • Supplied with two connection cables: One with a 6.35 millimeter stereo plug, the other a 4.4 millimeter Pentaconn balanced stereo plug. Also included is a 6.35 millimeter to 3.5 millimeter adaptor. Connectivity Technology: Wired 6.35 millimeter / 4.4 millimeter Pentaconn
  • Frequency response 10 to 41,000 Hz ( 10 dB), Impedance 150 ohm
  • Note: Kindly refer to the user manual provided as a PDF manual in the product description section
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Sennheiser Consumer Audio HD 660 S - HiRes Audiophile Open Back Headphone
Sennheiser Consumer Audio HD 660 S - HiRes Audiophile Open Back Headphone
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Price$449.95-35% $149.95
List:$229.25
$4,999.00-33% $399.95
List:$599.95
-7% $241.80
Typical:$259.94
-24% $379.00
List:$499.00
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Sound quality
4.7
4.6
4.4
5.0
4.6
Comfort
4.5
4.4
4.4
4.0
Noise cancellation
2.6
2.7
2.7
3.4
For gaming
4.7
4.4
3.9
Value for money
4.0
4.5
3.6
Sold By
ARF Tech
ARF Tech
WORLD WIDE STEREO
Amazon.com
Kap Inc.
GRAMOPHONE
connectivity tech
Wired
Wired
Cable
Wired
Wired
Wired
headphones form factor
Over Ear
Over Ear
Over Ear
Over Ear
Over Ear
Over Ear
connector type
3.5mm Jack
1/4-inch, 3.5mm Jack
3.5mm Jack
3.5mm Jack
3 5mm Jack
3.5mm Jack
headphones jack
3.5 mm; 6.3 mm
3.5 mm Jack
3.5mm, 6.35mm
3.5 mm Jack
3.5 mm Jack
cable feature
Detachable
Detachable
Retractable
Detachable
Without Cable
Detachable
control type
diaphragm movement
control
Media Control
Media Control
Media Control

From the manufacturer

Sennheiser HD 660S

Sennheiser HD 660S

The powerhouse open-back headphone.

Connects you to the deepest corners of your music collection.

Sennheiser HD 660S

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.

The HD 660S transcends the best of that storied DNA with supernatural speed and effortless instrument reproduction—even at the bookends of the frequency spectrum. Utilizing an all-new transducer and specially ventilated drive unit, the HD 660S delivers the revealing, tack-sharp detail audiophiles demand without sacrificing the engaging dynamics that make music so enjoyable.

Sennheiser HD 660S

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.

What you hear each and every time is the result of an open-back earcup mated to a new transducer tuned for the modern audiophile. Its speedy response is perfectly suited for reproducing those frequency-stretching recordings with confidence. Thanks to an aluminum voice coil, the 38mm diaphragm remains nimble for ultra-quick impulse fidelity across the board. This activation and rest behaviour unlocks the capability to communicate tonal and spatial characteristics precisely.

Sennheiser HD 660S

Meshing together

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

It completes the ventilated driver, offering consistent control of air displacement to reduce turbulence. As a result, diaphragm travel is pure, letting the music—and only the music—shine in a perfect balance of integrity and expression. The steel composition allows for much tighter production tolerances, ultimately contributing to remarkably consistent characteristics of each HD 660S produced. When combined with the open-back earcups, the sound emanating from each transducer is completely free to expand, just as it would in nature.

Sennheiser HD 660S

Capability, meet versatility

Today’s audiophile has more component choices than ever.

We optimized the HD 660S for efficiency on a wider range of devices to accommodate the varying levels of power present in output amplification circuitry. At 150 ohms, the HD 660S is the perfect partner for dedicated amplifiers, A/V receivers, and digital audio players (DAPs)—the magnet is more powerful than its predecessors, and thus easier to drive regardless of how your setup changes over time.

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

Product guides and documents

What's in the box

  • Cable
  • Pentaccon Plug
  • Manual
  • Looking for specific info?

    Product information

    Warranty & Support

    Product Warranty: For warranty information about this product, please click here

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    Sennheiser

    Sennheiser Consumer Audio HD 660 S - HiRes Audiophile Open Back Headphone


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    Product Description

    Sennheiser's new HD 660 S is an open back, dynamic headphone designed for the passionate audiophile. Meticulously crafted for the most demanding listeners, the HD 660 S builds on the legacy of the legendary HD 650, surpassing the exceptional performance of its predecessor incorporating a new and improved transducer that delivers lower harmonic distortion producing a more natural, lifelike audio experience. It is exceptionally accurate and transparent, with an expressiveness that immerses the listener in every emotion and nuance of the music. Employing a lower 150 ohm impedance, and supplied with cables using balanced (4.4 mm Pentaconn) and 6.35 mm connectors, the HD 660 S offers connectivity versatility to provide reference class fidelity with stationary and mobile audio players alike.

    Customer reviews

    4.7 out of 5 stars
    4.7 out of 5
    1,962 global ratings

    Customers say

    Customers like the sound quality, quality and value of the headphones. For example, they mention that it has a wonderful sound, the bass is strong and everything sounds very clean. They appreciate the value for money, saying that they're worth the price. Customers also appreciate the appearance, saying they look professional. Opinions are mixed on comfort.

    AI-generated from the text of customer reviews

    282 customers mention216 positive66 negative

    Customers like the sound quality of the headphones. They say it has a wonderful sound, with strong bass. They also say the bass is enough for rap music and everything sounds very clean. Customers also mention that the open back design allows them to hear everything in their room. They describe the headphones as a very musical headphone and worth considering for its intended use.

    "...Since they're open-back, I can hear everything in my room, which makes it feel a lot more personal, almost more like a concert...." Read more

    "...The 660 S is pure magic for your ears. It’s worth the price. 💯We can’t really talk about the 660 S without talking about the 650...." Read more

    "...But after a few days of listening, I notice that I do have enough bass for my rap music…it’s just that the vocals and instruments are so dominant..." Read more

    "...The open back assist with the awesome sound! Giving it a more open airy sound. Not a HUGE sound stage so don't get me wrong...." Read more

    131 customers mention116 positive15 negative

    Customers like the quality of the headphones. They say they are the best quality they have ever heard in headphones, they are built well, and the cables are very well made. The bass is very accurate, and everything else is just fabulous. They also say they have had zero issues with the headphones and are well performing.

    "...The headphones are relatively light, and the build quality feels, well, German. Attention to detail and material quality is through the roof...." Read more

    "...If you’re on the fence like I was, just get these. Do it! They’re glorious. They’re glorious with any DAC assuming they have enough power...." Read more

    "These are simply an amazing pair of headphones. The vocals simply stand out in super HD clarity while instrumentals blend in effortlessly...." Read more

    "...The HD 660S is a very musical headphone and worth considering for its intended purpose: enjoying Hi-Res music to the point one can get completely..." Read more

    74 customers mention52 positive22 negative

    Customers like the value of the headphones. They say they are worth the price and a great buy.

    "...The 660 S is pure magic for your ears. It’s worth the price. 💯We can’t really talk about the 660 S without talking about the 650...." Read more

    "...basis for about a month now, and can comfortably say they're 100% worth the price...." Read more

    "...The price is fairly high and one could say that for half the price there is probably a similar option out there without sacrificing comfortability..." Read more

    "...but these were worth every penny.It asked about Noise Cancellation, but these are Open Back so there's not much isolation (as intended)." Read more

    38 customers mention33 positive5 negative

    Customers like the detail in the headphones. For example, they say the highs are super detailed without any hint of harshness. Customers also say the headphones are fast and clear, and reveal details in their music collection that they never heard before. They say they reward you greatly for clear, high-end music.

    "...I found that they reward you greatly for clear, high-end music such as TOOL, Pink Floyd, non-bass-heavy EDM, soundtracks, classical, jazz... the..." Read more

    "...All the details are there. Unless you’re a huge fan of V shaped headphones, you won’t find something better under $500 than this...." Read more

    "...Like I said, it's very detailed. You will hear sounds from your previous favorite tracks that you've never heard on other cheaper headphone/Earbuds...." Read more

    "...Crystal clear audio quality and picks up the most subtle details in movies, music or gaming...." Read more

    37 customers mention37 positive0 negative

    Customers are satisfied with the appearance of the headphones. They mention that it's exquisite, professional looking, and neat. They also say that the sound is vibrant, beautifully reproduced, and truly spectacular. Customers also say the box it came in was really cool and the presentation was amazing. Overall, customers are happy with their purchase and recommend it to others.

    "...First off, the packaging made me feel special. These Sennheisers come in a beautiful, stiff box with molded foam in the interior so you can use it..." Read more

    "...added touch of adding the symbol to the gate and personally love the design and look of it" Read more

    "...listeners agree that what makes a headphone sound "good" is neutral, natural, balanced sound that replicates the audio quality of good speakers..." Read more

    "...It's very inviting to put on simply because how nice it looks and feels. However, the sound quality leaves a bit much to be desired...." Read more

    27 customers mention21 positive6 negative

    Customers like the performance of the headphones. For example, they say it delivers great performance, works great with iPhone, and responds very well to EQ. Customers also mention that the headphones are comfortable and work well with a wide range of music. They also say the headphones work great on an audio interface headphone jack and are efficient. Overall, customers are satisfied with the performance and recommend them to others.

    "...Where these really shine is the treble for me. These present fatigueless, milky smooth, crystal clear, purely magical, ear soothing, and perfectly..." Read more

    "...Works great on an audio interface headphone jack. My ik multimedia axe i/o 120 ohm headphones output works great. Decent bass definition and detail...." Read more

    "...This headphones are perfect for that type of music. They work good with every genre of music...." Read more

    "...When they first arrived the 1/4" headphones cord was faulty so only one ear was work...." Read more

    23 customers mention23 positive0 negative

    Customers are satisfied with the clarity of the headphones. They mention that the mids and highs are crystal clear, and the resolution is unbelievable. They also appreciate the imaging, saying that it's absurd and on point. Overall, customers are happy with the performance of the product.

    "...Phenomenal imaging. They sound so clear. If you’re on the fence like I was, just get these. Do it! They’re glorious...." Read more

    "...You can crank it up until volume is unbearable but the clarity is STILL THERE…no distortion. I don’t even understand how that is possible...." Read more

    "...I am no audiophile by any means, but the clarity is just top notch." Read more

    "...And the imaging is among the best for under $500 based off my experience and research." Read more

    126 customers mention79 positive47 negative

    Customers are mixed about the comfort of the headphones. Some mention that they are comfortable and soothing, while others say that they squeeze their head a little hard at first and are tight on their head.

    "...-Comfortable-Excellent build qualityCons:-Weak bass..." Read more

    "...present fatigueless, milky smooth, crystal clear, purely magical, ear soothing, and perfectly accurate highs...." Read more

    "...Admittedly though, not the most comfortable headsets. They are a little tight, and I thought after a month of use they'd open up a bit and be better...." Read more

    "...The 660S headphones that go over/around your ear are very comfortable! I have a big head and they feel light and comfy!..." Read more

    Gotta love the Sennheiser!!!
    5 Stars
    Gotta love the Sennheiser!!!
    Let me start off by stating that I own the Sennheiser 600's too.And this headphone isn't that.The 600 is a very Audiophile quality headphone.This version is more a 50% Audiophile 50% enjoyment headphone!An Audiophile headphone is flat and VERY detailed! 3D, pretty much as close as possible to actually being there in the studio. At least that's what an Audiophile looks for.The 660S isn't flat. Pretty detailed but the bass is bumped up a notch or two.This headphone is more enjoyable for the "Normal" person. Like I said, it's very detailed. You will hear sounds from your previous favorite tracks that you've never heard on other cheaper headphone/Earbuds. Ticks, taps clicks, clings and so on, lol!Pretty much your music is now High Quality!And you will be able to tell with these!The 660S are open back. Meaning you can easily hear other sounds around you. Someone speaking to you or a television in the background. It'll ruin your music experience. You need to be in a quiet room or away from others. If you mind?They aren't closed such as a traditional headphone that we've all pretty much are accustomed to. The open back assist with the awesome sound! Giving it a more open airy sound. Not a HUGE sound stage so don't get me wrong. Not like an 800 Sennheiser! LolThe 660S headphones that go over/around your ear are very comfortable! I have a big head and they feel light and comfy!The clamp around the ears isn't bad for me. I can move my head aggressively and they don't slide off. But they aren't clamped on with a lot of pressure either. They're perfect!The cord that it comes with is pretty long! Not many are fans of. If you wanna just connect to your phone and move around your house jamming out? These aren't for ya, lolAt least the cord that it comes with isn't. This headphone follows after the 600's. Which are meant to be experienced at home. Connected to a high def device. In which you are given plenty of cord so you can sit down with comfort! Unlike other headphones where you move around and you end up yanking the headphone accidently or however. These are not mobile Headphones. But these do not require Hi-Def. Devices! That's the cool thing about these compared to the 600's.The 600's require a lot of power and clean power and a VERY good Dac for ultimate Nirvana sound!Pretty much you need to put in a lot of money towards your investment with the 600's!These 660S's you don't. An Audiophile on a budget can easily enjoy these!A simple headphone connection and you can enjoy these without wondering what else can you attach to obtain it's optimum sound!Of coarse, it is 50% Audiophile grade so use the highest quality connections you can with these! The better and cleaner the better the 660S will perform!But don't stress!They are 50% relax and enjoy type of headphone! And in my opinion, they are AWESOME! 😉👍👍👍Plus with some extras, true Audiophile grade headphones provide!If you're looking for a Pro, flat Audiophile sound? These will not satisfy.The 600's will.If you're someone who enjoys good quality music but don't want that really flat tuning. And don't or cant really obtain expensive devices to enjoy them? These are for you.They are awesome!I haven't used the Balanced cord on them. So I can't write my opinion on that.Sennheiser, keep it up, you guys are AWESOME!For those that haven't tried out a Sennheiser headphone yet? Do it. Give them a try!Sennheiser doesn't flake out on premium sound! They are ALL about it!Plus, with Amazon you can always return them if you aren't a fan of them for any reason!30 days I believe?Enjoy!I know I am!(As we speak!)
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    Top reviews from the United States

    Reviewed in the United States on September 1, 2023
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    11 people found this helpful
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    Reviewed in the United States on March 6, 2022
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    Reviewed in the United States on November 8, 2023
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    Top reviews from other countries

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    XZSr
    5.0 out of 5 stars Made in Ireland, good for someone looking for endgame headphones.
    Reviewed in Canada on March 19, 2022
    Style: SingleVerified Purchase
    9 people found this helpful
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    David M.
    5.0 out of 5 stars Best open back headphones for the price
    Reviewed in the United Kingdom on August 13, 2023
    Style: SingleVerified Purchase
    One person found this helpful
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    Efraín
    5.0 out of 5 stars Excelentes audífonos
    Reviewed in Mexico on April 6, 2021
    Style: SingleVerified Purchase
    4 people found this helpful
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    Nayan Saikia
    5.0 out of 5 stars Awesome Open back
    Reviewed in India on September 12, 2020
    Style: SingleVerified Purchase
    5 people found this helpful
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    ns
    5.0 out of 5 stars これまで聞こえていなかった音が聞こえる
    Reviewed in Japan on April 12, 2022
    Style: SingleVerified Purchase
    One person found this helpful
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