Sennheiser HD 660S2

$395.00 to $679.95 Price Tier: High-end

5.0 (2)

6 Critic Reviews

1 Review

All time low price

1 wishlisted

4 saved

Page last updated Jun 12, 2026

Pricing and availability

We compare 600+ stores and found this item at 7 stores. Prices updated June 4, 2026.

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5.0 (8)

$679.95

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4.5 (8)

$679.95 $479.95 $200.00 · All time low

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4.5 (631)

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$679.95

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5.0 (5)

$679.95

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4.8 (22)

$429.00 $425.00 $4.00 · All time low

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$679.95

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Average Price: $574

High-end/Boutique

$100

$301+

Price Tier

In the Headphones & In-Ear Monitors category, Sennheiser HD 660S2 is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

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Standard

High-end

Price History

Based on price data from 7 merchants for "Sennheiser HD 660S2". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Immerse yourself in the world of pristine audio with the Sennheiser HD 660S2, a top-tier choice for discerning audiophiles and musicians alike. These open-back headphones are designed to deliver an expansive soundstage that captures every nuance of your music. At the heart of the HD 660S2 lies a specialized 38mm transducer, offering a frequency range that spans from the deepest bass to the highest highs, ensuring nothing short of crystal-clear sound reproduction.

The HD 660S2 is all about precision and comfort. Equipped with an ultra-light aluminum voice coil, these headphones boast a 300-ohm impedance, delivering quick impulse response and a dynamic listening experience. The open design, enhanced by a steel mesh and optimized airflow system, minimizes turbulence, allowing for a natural and immersive sound that feels alive. Plus, the plush velour ear pads and lightweight construction mean you can enjoy extended listening sessions without discomfort.

Sennheiser has doubled the SPL in the sub-bass frequencies, enhancing the depth and richness of low-end tones, making these headphones perfect for those who demand detail and depth across the entire audio spectrum. Whether you're in the studio or simply enjoying your favorite tracks at home, the HD 660S2 offers an unparalleled audio journey.

Key Features:

Wired, open-back design for a spacious audio experience
Frequency range: 8 - 41,500 Hz
Impedance: 300 Ohm
Sound pressure level: 104 dB (1V)
38mm transducer for detailed audio reproduction
Distortion factor: <0.04% (1 kHz, 100 dB)
Velour ear pads for comfort
Includes 1.8 m cables (6.3 mm stereo jack and 4.4 mm balanced), 6.3 mm to 3.5 mm adapter, and carrying pouch

Owner's manual

Sennheiser HD 660S2 User Manual

Product specs

Type	Wired
Open/Closed	Open
Fit Style	Circumaural (Around the Ear)
Driver Size	38mm
Frequency Response	5Hz-41.5kHz
Impedance	300 ohms
Connectivity	1/4" plug, 1/8" adapter
Cable Type	Straight
Cable Length	9.8 ft.
Detachable Cable	Yes
Material	Velour Earpads
Case/Bag	Carry Pouch

FAQs

What type of sound signature can I expect from the Sennheiser HD 660S2 headphones?: The Sennheiser HD 660S2 headphones offer a warm sound signature with enhanced bass response, providing more thump and punch compared to previous models. They are ideal for listeners who enjoy a more dynamic and engaging audio experience.
Are the Sennheiser HD 660S2 headphones suitable for use with portable devices?: With an impedance of 300 ohms, the Sennheiser HD 660S2 headphones are best used with dedicated headphone amplifiers or high-quality audio interfaces to ensure optimal performance, especially when used with portable devices.
How comfortable are the Sennheiser HD 660S2 headphones for long listening sessions?: The Sennheiser HD 660S2 headphones feature circumaural velour earpads, providing a comfortable fit around the ears. This design is well-suited for extended listening sessions without causing discomfort.
Do the Sennheiser HD 660S2 headphones come with a detachable cable?: Yes, the Sennheiser HD 660S2 headphones come with a detachable cable, allowing for easy replacement or upgrading if needed.
What kind of connectivity options do the Sennheiser HD 660S2 headphones offer?: The Sennheiser HD 660S2 headphones include a 1/4" plug and a 1/8" adapter, providing flexibility for connecting to various audio sources.

Videos

Add video

The Headphone Show

Is Sennheiser's new headphone REALLY an upgrade?

The Headphone Show

HD660S2 - The side-grade we've been waiting for?

DMS

The NEW HD660S2! - $600!?

Joshua Valour

HD660S2 HD650 HD600 HD800S Sound Demo

Kanou

What was WRONG with the original Sennheiser HD 660S? HD 660S2 Review

Passion for Sound

HD 660S2 Audiophile Headphones | Sennheiser

Sennheiser

Sennheiser HD660S2 - The New Reference Standard Under 1k? - The Honest Audiophile

the Honest Audiophile

zu wenig, zu spät & zu teuer | Sennheiser HD 660S2

Damir Franc

Was kann der neue Sennheiser HD660S2? | erster Eindruck und Impressionen des Kopfhörers

Fidelity Hamburg

Reviews

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PROS

Enhanced bass response, balanced and well-defined
Improved warmth and harmony in sound compared to predecessor
Good stereo imaging and sense of space
Comfortable for extended listening sessions
Effective for mixing, especially in low-end frequencies
Mids and highs are well-defined

CONS

Soundstage feels less expansive, more confined
Some precision and clarity lost in complex musical passages
Compared to higher-end models, lacks in accuracy and spatial representation

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Sennheiser HD 660S2.

Mods and upgrades

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Using dedicated DAC/amps like Topping DX3 Pro+ or Fiio K7 is recommended to enhance the HD 660S2’s sound quality.
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Use cases and applications

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The HD660S2 is noted as more enjoyable for classic metal albums like "Rust in Peace" and "Painkiller," due to its warm sound profile.
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Users report the 660S2 is effective for gaming due to its comfort and detailed sound, although its soundstage is not expansive.
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Build quality

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The HD660S2 is highlighted for its superior build quality and comfort over the HD560S, making it better for long listening sessions.
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User experience

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Users have reported that the HD660S2 feels warmer and less treble-intensive, which suits those who enjoy a more relaxed sound signature.
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Users transitioning from consumer headphones often find the HD 660S2's sound signature initially underwhelming, with a longer adjustment period needed.
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Some users find the 660S2 more comfortable for long sessions compared to heavier models like the Focal Clear and Arya due to lighter weight.
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Comparisons

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Some owners find the HD560S offers better bass "slam" than the HD660S2, providing a more "fun" listening experience.
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The HD560S has a wider soundstage compared to the HD660S2, making it preferable for genres like soundtracks and live albums.
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The HD 660S2's imaging and separation are noted as improvements over the HD 6XX, with more precise instrument placement.
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The 660S2 is compared to Focal Elex rather than Focal Clear, with some users preferring the Elex for overall enjoyment and balance in the sub-$1000 range.
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Some owners find the HD 6XX more favorable than the HD 660S2 due to its vocal clarity, particularly in the upper midrange.
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The 660S2 bass is noted to be cleaner and more extended than the HD 600 and 650, even when EQ-ed to similar targets.
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Features and functionality

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The HD 660S2's treble is described as neither muffled nor piercing, offering a balanced experience for long listening sessions.
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The 660S2 is praised for having more pronounced bass than other models in the 600 series, without being overwhelming or "boomy."
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Software and compatibility

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The HD 660S2 is sensitive to the source quality, with some interfaces like the Asus Strix Soar and older Focusrite models resulting in subpar sound quality.
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Setup and maintenance

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Users report the HD 660S2 requires a dedicated desktop amp for best performance, with the Focusrite 2i2 often failing to adequately power the headphones.
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Value and pricing

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Owners suggest that the 660S2 would be more competitive if priced around $400, as its current pricing is considered high for its capabilities.
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Critic Reviews

Sennheiser HD 660S2 review - SoundGuys

soundguys.com

The Sennheiser HD 660S2 offers a refined audio experience with improved bass, but it may not cater to everyone's musical preferences. While it excels in comfort, sound quality, and ease of maintenance, its higher price point and relatively muted treble may deter potential buyers, particularly those accustomed to brighter sound profiles. It's an admirable evolution from its predecessor, but for those who already own the HD 660S or HD 600, upgrading might not be necessary. The HD 660S2 is best suited for audiophiles seeking a specific sound without the need for extensive equalization, but it's wise to audition them before committing to a purchase.

neutral

Full Review

World Premiere Sennheiser HD 660S2 Review - The Saga Continues - Soundnews

soundnews.net

The Sennheiser HD 660S2 offers a refined evolution of its predecessors, boasting richer bass and enhanced clarity, making it a compelling choice for audiophiles. With thoughtful design changes like shorter cables and an eco-friendly package, it feels modern while retaining that classic Sennheiser appeal. However, at $599, the price hike compared to the original might give some pause, as it's not a dramatic leap in performance. Still, the HD 660S2 excels in delivering a more dynamic sound, especially in the low-end, and offers a smoother treble without fatigue. Overall, it's a great option for those seeking a warmer, more engaging listening experience.

positive

Full Review

Sennheiser HD 660S2 review: a charming smoothness to their sound, but some flaws hold them back | What Hi-Fi?

whathifi.com

The Sennheiser HD 660S2 offers a smooth and pleasant listening experience, particularly excelling with midrange and vocal performances that are captivating and refined. However, its soft bass and lack of dynamic punch leave it wanting, especially with more demanding tracks. While acoustic and vocal-heavy genres shine, those seeking punchy bass and intricate low-frequency detail may find better options elsewhere. Overall, the HD 660S2 serves as a solid choice for a relaxed listening experience, though it may not satisfy all audiophiles' needs.

neutral

Full Review

Sennheiser HD 660S2 Review - Headfonia Reviews

headfonia.com

The Sennheiser HD 660S2 offers an impressive soundstage and enhanced bass response, impressing audiophiles with its clarity and detail. However, the packaging feels underwhelming for its price, and some users might find it lacks the warmth and richness of its predecessor, the HD 650. Despite these drawbacks, its overall performance and features make it a worthy contender in the headphone market.

positive

Full Review

Sennheiser HD 660S2 Review - RTINGS.com

rtings.com

The Sennheiser HD 660S2 delivers a warm, bassier sound compared to its predecessor, appealing to those who enjoy a bit of punch in their audiophile experience. However, their treble response can be uneven, potentially making sibilants sound overly aggressive. They require a powerful amp to unleash their potential and are not ideal for travel or office settings due to significant audio leakage. Their passive soundstage lacks the immersive quality found in other models, and while they are comfortable for short sessions, the high clamping force may become bothersome over time. Solid construction and consistent audio performance are highlights, but the need for a dedicated setup could be a dealbreaker for some listeners.

neutral

Full Review

Sennheiser HD 660S2 Review: Heavenly low end, premium price | WIRED

wired.com

While the Sennheiser HD 660S2 offers a warm, refined sound with impressive bass depth, it struggles to justify its premium price compared to its more affordable siblings. The build feels underwhelming for $600, lacking a hard case and featuring a tight clamping force that may be uncomfortable for some. The sonic clarity and dynamic response are undeniable, revealing intricate details in your favorite tracks, but the comfort issues and high cost may lead many to consider the cheaper HD 6XX or HD 660 instead. Ultimately, for those seeking enhanced bass and a unique sound signature, the HD 660S2 could be worth the investment, but the value proposition is debatable.

neutral

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5.0 out of 5

Based on 1 Review and 2 Ratings

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1 star

charlie_hurst

618

about 2 years ago

Beautiful audio presentation

Just stunning audio performance. Incredible stereo imaging and sense of space from almost any audio source. The best headphones I've heard in years. And comfortable for long sessions.

Roles:

Guitarist Bassist Audio Engineer

Genres:

Electronic Rock Alternative rock