Headphones jack | 3.5 mm; 6.3 mm |
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Model name | HD 660 S |
Connectivity technology | Bluetooth |
Included components | HD 660 S, Cable with 6.35 mm plug, Cable with 4,4 mm Pentaconn plug (balanced), Adaptor 6.35 to 3.5 mm, Manual, Storage box |
Material | Copper |
Specific uses for product | Professional Audio, Entertainment |
Compatible devices | [PO] Potentially various audio output devices with 3.5 mm or 6.3 mm jack |
Cable feature | Tangle Free |
Item weight | 0.58 Pounds |
Water resistance level | Not Water Resistant |
Frequency range | 10 - 41,000 Hz |
Package type | Standard Packaging |
Unit count | 1.0 count |
Style | Contemporary |
Manufacturer | Sennheiser |
Model | HD 660 S |
Part Number | B508826 |
Special features | Lightweight |
Number of Items | 6 |
Aspect Ratio | Unknown |
Power source type | Power Source |
Batteries included | No |
Batteries Required | No |
Battery Cell Composition | Lithium Ion |
Cable Feature | Tangle Free |
Material Type | Copper |
Manufacturer | Sennheiser |
Item model number | HD 660 S |
Product Dimensions | 25.7 x 10.8 x 32 cm; 263.08 g |
ASIN | B076HP574T |
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Sennheiser HD 660 S - HiRes Audiophile Open Back Headphone
Brand | Sennheiser |
Colour | Black |
Ear placement | Open Ear |
Form factor | Over Ear |
Impedance | 150 Ohm |
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
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Product information
Technical Details
Additional Information
Date First Available | Oct. 25 2017 |
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Customer Reviews |
4.5 out of 5 stars |
Âé¶¹Çø Rank |
|
Is discontinued by manufacturer | No |
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Product description
Sennheiser's new HD 660 S is an open back, dynamic headphone designed for the passionate audiophile.
Top Brand: Âé¶¹Çø Renewed
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Price | Currently unavailable. | $799.95$799.95 | $279.99$279.99 | $849.99$849.99 | $409.99$409.99 | $999.00$999.00 |
Delivery | ¡ª | Get it by Sunday, Jun 15 | Get it by Sunday, Jun 15 | Get it by Sunday, Jun 15 | Get it Jun 17 - 20 | Get it by Tuesday, Jun 17 |
Customer ratings | ||||||
Sold by | ¡ª | Luna Electronics | Âé¶¹Çø.ca | beyerdynamic | AVGearShop | EQ Audio Video |
connectivity tech | Bluetooth | Wired | Wired | Wired | Wired | Wireless |
headphones form factor | Over Ear | Over Ear | Over Ear | Over Ear | Over Ear | Over Ear |
connector type | ¡ª | 3.5mm Jack | 1/4-inch, 3.5mm Jack | ¡ª | 3.5mm Jack | USB Type C, 3.5mm Jack |
headphones jack | 3.5 mm; 6.3 mm | 1/4 inch TRS, 4.4 mm TRRRS | 6.3 mm Jack with 3.5 adapter | mini-XLR | 3.5 mm Jack | 3.5 mm Jack |
cable feature | Tangle Free | Detachable | Detachable | ¡ª | Detachable | Detachable |
control type | ¡ª | Media Control | control | ¡ª | Media Control | Volume Control |
water resistance | not water resistant | not water resistant | not water resistant | not water resistant | not water resistant | not water resistant |
material | Copper | Aluminum | Velour | ¡ª | Plastic | Aluminum Leather Metal |
model name | HD 660 S | HD 660S2 | HD 560S | DT 1990 PRO MKII | Edition XS | FBATHYS |
frequency range | 10 - 41,000 Hz | 8 Hz to 41,500 Hz | ¡ª | 20 Hz - 20,000 Hz | 8Hz-50kHz | 20 Hz - 20,000 Hz |
From the brand

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We are audio experts and music lovers who¡¯ve been striving for the best audio experience. Through the craft and precision of German Engineering we create innovative products to reinvent the future of audio with remarkable audio experiences that you don¡¯t just hear ¨C but feel. That is what the Sennheiser brand has represented for more than 75 years.
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Intense Science
We are driven by the passion to create audio solutions that make a difference, by constantly rediscovering the needs of our customers.
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Intense Sound
Our ability to redefine sound has continued to set the norm, allowing music lovers worldwide to experience sound in a new dimension.
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Intense Emotion
As audio fanatics we strive for a remarkable sound you not only hear ¨C but feel. We measure our success by the goosebumps on your skin.
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We invite you to discover our wide variety of premium audio products, which are divided into the following four categories: Premium Headphones, Audiophile Headphones, Hearing Solutions and Soundbars.
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Premium Headphones
Offering a wide selection of headphone styles from True Wireless to Over-Ear for premium music enjoyment no matter where you are.
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Audiophile Headphones
Continuously striving to define new industry standards with headphones for both home and mobile listening.
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Hearing Solutions
Seeking to provide market-leading enhanced hearing products? from TV listening to situational hearing.
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Soundbars
Providing outstanding immersive sound experiences for home entertainment by a single device.
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Hear the Difference
From the manufacturer



Sennheiser is shaping the Future of Audio ¨C a vision built on a 75-year history of innovation and a continued drive for excellence that is woven into our company¡¯s DNA and culture. Around the world, our employees share this passion in the pursuit of the perfect sound, creating products that exceed expectations and set new benchmarks in audio.
Meet the Sennheiser HD 660 S
The new HD 660 S is the successor to the legendary HD 650. This open-back, dynamic headphone features new lower (150-ohm) impedance transducers producing reference-class sound when connected to both Hi-Res home or mobile audio systems. An elegantly designed piece of German engineering, the HD 660 S delivers exceptionally accurate and transparent sound, with an expressiveness that immerses the listener in every emotion and nuance of the music.
- Did you know? The HD 660 S is designed and engineered in Germany, then manufactured to exacting standards in Sennheiser¡¯s Tulamore, Ireland factory.
- Every HD 660 S undergoes rigorous, multi-parameter testing to insure performance essential to the most demanding listeners.
Features
Exceptional Sound
Crafted for the demanding listener, the HD 660 S surpasses the performance of its predecessor, the legendary HD 650. Detailed and dynamic, with an extended and balanced frequency response the HD 660 S is both exceptionally accurate and musically expressive. The lower 150-ohm impedance facilitates direct connection to both premium home and mobile audio devices.
Advanced Transducers
The HD 660 S employs newly designed transducers featuring extremely lightweight aluminum voice coils coupled to diaphragms precision-crafted from stainless steel fabric. This combination results in exceptional transient response and improved control of diaphragm movement reducing distortion. Additionally, transducers are produced and matched to extremely tight (¡À 1 dB) tolerance ensuring superb performance.
Versatile Connectivity
The HD 660 S is supplied with two para-aramid reinforced detachable cables employing high conductivity OFC copper to insure signal integrity with very low handling noise. One cable is terminated with a 6.35mm stereo plug (a 3.5mm adaptor is also included), the other with the new 4.4 mm Pentaconn balanced stereo plug. Balanced connectivity can reveal full HD 660 S performance potential when paired with the balanced output of digital audio player or headphone amplifier like the Sennheiser HDV 820.
Supreme Comfort
The HD 660 S is designed for pure listening pleasure. Its open-back architecture is strong yet lightweight and allows airflow to the ears, keeping them cool during listening sessions. The large elliptical ear cups are shaped following the anatomy of the ear, and feature soft velour covered ear cushions. Thick headband padding completes the comfort package to provide hours and hours of supreme listening pleasure.
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HD 660 S
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HD 650
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HD 600
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HD 700
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Customer Reviews |
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4.5 out of 5 stars 2,760
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4.6 out of 5 stars 2,775
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4.3 out of 5 stars 293
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Ear Coupling | Over-ear (circumaural) | Over-ear (circumaural) | Over-ear (circumaural) | Over-ear (circumaural) |
Transducer Principle | Dynamic, Open | Dynamic, Open | Dynamic, Open | Dynamic, Open |
Frequency Response | 10 ¨C 41,000 Hz (-10 dB), Diffuse-field equalized | 10 ¨C 41,000 Hz | 12 ¨C 40,500 Hz | 8 ¨C 44,000 Hz (-10 dB), Diffuse-field equalized |
Sound Pressure Level (SPL) | 104 dB (1 kHz / 1 Vrms) | 103 dB (1 kHz / 1 Vrms) | 93 dB (1 kHz / 1 Vrms) | 105 dB (1 kHz / 1 Vrms) |
Impedance | <0.04% (1 kHz, 100 dB) | <0.05% (1 kHz, 100 dB) | <0.01% (1 kHz, 100 dB) | <0.03% (1 kHz, 100 dB) |
Total Harmonic Distortion and Noise (THD + N) | 6.35 mm / 4.4 mm Pentaconn | 6.35 mm | 3.5 / 6.3 mm Stereo | ?¡± (6.3 mm) Stereo |
Connector | 6.35 mm / 4.4 mm Pentaconn | 6.35 mm | 3.5 / 6.3 mm Stereo | ?¡± (6.3 mm) Stereo |
Weight w/o Cable | 9.17 oz. (260 g) | 9.17 oz. (260 g) | 9.17 oz. (260 g) | 9.52 oz. (270 g) |
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 | HD 650 / Cable with 6.35 mm Plug / Adapter 6.35 to 3.5 mm / Manual / Storage Box | HD 600 / Cable with 6.35 mm Plug / Adapter 6.35 to 3.5 mm / Manual / Storage Box | HD 700 / Cable with 6.35 mm Plug / Manual / Storage Box |
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