Sennheiser - HD 660S2

Open-Back Headphones

Sale price₹ 29,990 Regular priceMRP: ₹ 54,990
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Why Sennheiser is Special

🇩🇪

Designed in Germany

Established & Reputed

Trust us, our reputation speaks for itself 🏆!


I believe that when a brand has decades of proven excellence, you can invest with confidence knowing your purchase is backed by years of audio engineering expertise. These products come from manufacturers with extensive histories of innovation and unwavering commitment to sonic excellence. Think of them like luxury watch brands - their reputation has been earned through decades of consistent quality and innovation.


With their extensive history of innovation and countless satisfied customers worldwide, you can be confident your investment is backed by proven audio engineering expertise and industry leadership 📈.


When you see "🎖️ Established & Reputed" products, expect time-tested excellence from manufacturers who've consistently demonstrated mastery in audio engineering for generations.

Revered by Audiophiles

Audiophiles can be really picky 😤, and if the audiophile community says something sounds good, you can bet it's exceptional! I believe that earning audiophile reverence is like getting a standing ovation from music critics - it doesn't happen unless you've truly achieved something special. This audio gear has earned widespread acclaim from audiophiles worldwide, a community renowned for exacting standards and unwavering commitment to high-fidelity reproduction.


These discerning enthusiasts particularly value its extraordinary precision in sound reproduction and remarkable capability to create thoroughly immersive listening experiences. The audiophile community's endorsement carries significant weight because of their extensive experience with high-end equipment 🏆.


When you see "🙌🏻 Revered by Audiophiles" products, expect audiophile-grade excellence that satisfies even the most demanding listeners and consistently exceeds the highest standards.

Specialist

A masterpiece from experts who know audio inside and out 🔧!


I tend to describe specialist manufacturers as "audio artisans" who focus exclusively on perfecting specific categories of equipment. These products are meticulously crafted by dedicated experts who possess deep knowledge of sound reproduction, ensuring every technical aspect is refined to perfection. Think of them like master craftsmen who spend their entire careers perfecting one specific skill - their focused expertise shows in every detail.


These dedicated experts bring years of specialised knowledge to the design process, resulting in products that consistently achieve exceptional performance standards through focused engineering excellence 🎯.


When you see "🌟 Specialist" products, expect focused expertise from manufacturers who dedicate their entire efforts to perfecting specific audio equipment categories.

🐣

Born in 1945

Why we love this Headphone

Premium Economy

Sensible spending meets sophisticated quality in perfect harmony 💫.


I tend to describe premium economy products as finding that sweet spot where exceptional value meets refined performance. Think of it like business class comfort at economy prices - you're getting significantly more than what you paid for. These headphones deliver a refined listening experience that rivals more expensive alternatives, making them an intelligent choice for discerning listeners who appreciate both value and excellence.


This thoughtfully curated selection demonstrates our commitment to bringing you outstanding sound quality and robust construction without requiring a significant financial investment. Each product has been meticulously evaluated to ensure it delivers performance characteristics typically associated with higher price brackets.


When you see "💎 Premium Economy" products, expect refined audio experiences that bridge the gap between entry-level and high-end offerings, delivering impressive clarity and features at accessible price points.


Serious Audiophiles Only

For those who have ventured deep into high-fidelity audio 🎯, the pursuit of sonic excellence becomes an endless journey of discovery and refinement. I believe that serious audiophiles demand equipment that can satisfy the most exacting standards and deliver performance that pushes boundaries. These products represent the pinnacle of acoustic engineering, incorporating advanced technologies and meticulous craftsmanship that enable them to reproduce music with utmost fidelity.


Each product has undergone rigorous evaluation to ensure it delivers exceptional performance that discerning listeners demand, from precise frequency response to impeccable detail retrieval and sophisticated sound staging. These devices incorporate premium components and engineering excellence that justify their position at the apex of audio performance.


When you encounter "🦈 Serious Audiophiles Only" products, expect uncompromising performance that satisfies the most demanding requirements and elevates critical listening to new heights.

Great for Studio & Professionals

When excellence is non-negotiable and precision is paramount 🎯, these audio solutions stand ready to meet the demanding standards of professional environments. I've found that studio work requires headphones that tell you the absolute truth about your audio - no sugar-coating, no flattery. These products deliver exceptional accuracy and outstanding detail retrieval with the unwavering reliability that professional audio work demands. Think of them as your honest audio advisor who never lies about what's really happening in your mix.


Whether you're recording, mixing, or engaged in critical listening sessions, these professional-grade solutions provide the clarity and precision needed to make informed decisions. The balanced frequency response and superior noise isolation create an ideal environment for professional audio work 🎚️.


When you see "🎙️ Great for Studio & Professionals" products, expect uncompromising precision and industry-leading performance that brings your creative projects to life.

⚖️

4.4mm Balanced Plug

Upgradeable Cable

Not satisfied with the current cable? No problem 🔧!


I believe in giving you complete freedom to customise your listening experience. These IEMs feature detachable cable systems that let you swap, upgrade, or replace cables whenever you want. Think of it like having a modular smartphone - you can upgrade individual components without replacing the whole device. Whether you're looking to improve sound quality, try different materials, or simply replace a worn cable, the choice is entirely yours.


The standardised upgradeable cable connection ensures compatibility with a wide range of aftermarket cables, giving you access to different sound characteristics and build qualities. This modular approach means your IEMs can evolve with your audio journey, allowing for easy maintenance and personalisation.


When you spot "🔌 Upgradeable Cable" products, expect future flexibility and the freedom to customise your audio experience through cable upgrades and replacements.

Why it Sounds Amazing

Dynamic Driver

The dynamic powerhouse of your sound ⚡!


I believe dynamic drivers are like the "reliable workhorses" of the headphone world - they've been perfected over decades and continue to deliver incredible performance. This driver design uses a lightweight diaphragm attached to a voice coil suspended within a permanent magnetic field, enabling precise and responsive movement that produces sound with remarkable efficiency. Think of them like precision engines that convert electrical energy into acoustic energy with impressive power and naturalness.


Dynamic drivers excel at delivering powerful and authoritative bass reproduction, clear midrange frequencies, and vibrant high frequencies. The inherent strengths ensure your music is reproduced with impressive dynamics and energy that stays true to the artist's intent 🎶.


When you see "🔈 Dynamic Driver" products, expect energetic, natural sound with excellent dynamics that bring every note and beat to life with exceptional realism.

Flat Sound Signature

I tend to describe a flat sound signature as the “studio monitor” of headphones—what goes in is what comes out. 🎚️ There’s no added flavour or colouration; it’s a true-to-source representation. Audiophiles and sound engineers who value neutrality and precision often gravitate toward this kind of tuning.


Here’s what’s actually happening: the entire frequency response is tuned to be as even as possible, so bass, mids, and treble are all balanced without any emphasis. This makes flat-sounding gear ideal for critical listening, mixing, or mastering, where accuracy matters more than excitement. But for casual listeners, it might feel a bit “boring.” That said, a well-done flat tuning can reveal the soul of a song like no other. 🎧

Crisp Vocals & Instruments

Vocals and instruments sound so good, it's like a warm hug 🤗!


I believe that when vocals are reproduced correctly, they should feel like the artist is performing right there with you. These headphones demonstrate exceptional prowess in reproducing clear, articulate vocals and instruments, with each element rendered in stunning detail and separation. Think of it like having front-row seats to an intimate acoustic performance where every breath, every string resonance, every subtle inflection comes through perfectly.


The natural timbre and tonal accuracy create an engaging presentation where every nuance is preserved while maintaining fatigue-free listening. Each word, note, and subtle inflection is reproduced with outstanding definition and emotional connection 🎤.


When you encounter "🍿 Crisp Vocals & Instruments" products, expect vocal excellence that brings you closer to the emotional heart of every performance.

Sharp & Precise Details

Are you a lover of sharp and precise details 🔍?


I believe that detail retrieval is like having audio superpowers - suddenly, you hear things in familiar songs that you never knew existed. These premium headphones are meticulously engineered to deliver remarkably detailed and precise sound reproduction, capturing every subtle nuance with exceptional accuracy. Think of them like high-resolution cameras for your ears that reveal the finest textures and micro-details that most headphones simply miss.


The carefully tuned drivers and advanced acoustic design ensure even the most delicate musical elements are reproduced with stunning precision. From the gentle brush of a cymbal to the subtle resonance of acoustic instruments, these products capture and present every sonic detail with remarkable accuracy 🎯.


When you see "📌 Sharp & Precise Details" products, expect extraordinary detail resolution that reveals new layers in familiar recordings with stunning clarity and precision.

Perfect to Analyse Music

Delve deeper into intricate musical layers 🎼!


I believe that some headphones are like musical microscopes - they reveal details and nuances that most people never even know exist in their favourite songs. These specialised audio tools are meticulously engineered for those who seek to explore the deepest intricacies of sound, offering exceptional precision for detailed music analysis. Think of them as detective tools for music that help you uncover every hidden element in complex compositions.


These products enable you to dissect and examine every aspect of the musical landscape, from subtle instrument textures to precise timing, from delicate vocal overtones to intricate harmonic layering. They're specifically crafted for musicians, producers, and discerning audiophiles who desire profound insights into technical and artistic elements 🔬.


When you encounter "🔍 Perfect to Analyse Music" products, expect analytical precision that reveals layers of detail and musical craftsmanship you never knew existed.

Needs Amplification

I tend to say this when a headphone or DAC just doesn’t wake up unless it’s got some real juice behind it. Think of it like a sports car that needs the right kind of fuel—without enough power, it won’t go anywhere near top speed. Some gear, especially those with high impedance or low sensitivity, demands a dedicated amplifier to reach its full potential.


Here's the trade-off: these headphones or IEMs may sound underwhelming straight out of a phone or laptop, but when paired with proper gear, they transform dramatically. You get tighter bass, better control, and improved resolution.


If you’ve got a power-hungry planar or a studio-grade headphone, investing in a portable or desktop amp will unlock nuance, dynamics, and depth that you’re otherwise missing out on. ⚡

Presenting The All-New HD 660S2, A Definitive Upgrade To The Legendary HD 660S

Sennheiser has a 75-year history, past achievements, and inventions in the audio industry as a third-generation family-run company, as well as its desire to influence its future. Sennheiser's engineers work diligently to provide some of the most audiophile-focused headphones available. The manufacturing process for headphones like the HD 600, HD 650, HD660S, HD 800 S, and HD 820, to mention a few, involved extensive research and development. With the same approach, the HD 660S2 was born. The new, high-end Sennheiser HD 660S2 headphone outperforms the iconic HD 660S's excellent performance. Sennheiser is attempting to expand its product line with the HD 660S2, designed specifically for the most demanding listeners. An eye-catching new matte black design is featured on the Sennheiser HD 660S2. It has a classically exquisite appearance with some modern influences. It truly represents sophistication with the text and logo having bronze colour. The HD 660S2 headphones provide an audiophile-grade experience that will take your breath away!

Equips High-Quality 38mm Dynamic Driver For Hi-Fi Audio

Sennheiser HD 660S2 features a 38mm dynamic driver that elevates audio to a higher level. It is equipped with high-end components for superior sound quality. This configuration provides an immersive listening experience, ideal for audiophiles.

Equips High-Quality 38mm Dynamic Driver For Hi-Fi Audio

Sennheiser HD 660S2 features a 38mm dynamic driver that elevates audio to a higher level. It is equipped with high-end components for superior sound quality. This configuration provides an immersive listening experience, ideal for audiophiles.

Open-Back Design Offers An Expansive Soundstage & Precise Imaging

The HD 660S2 has an updated coil which now matches the renowned HD 600 and HD 650 300-ohm impedance. This redesigned coil offers improved electrical damping and magnetic force for an impactful impulse response. It has significantly better accuracy, responsiveness, and resolution and twice as much sound pressure at the lowest frequencies. Sennheiser has retained extraordinary precision and balance throughout the sub-bass, mid-bass, and beyond. Extension on the low end changes everything — by creating more space for the sound. Against a deeper backdrop, highs feel more brilliant, the soundstage deeper and open, and emotions stronger with precise imaging. 

Exquisite Design With All-Day Wearing Comfort

The Sennheiser HD 660S2 is built entirely in Ireland and quickly grabs your attention due to its excellent build quality. The HD 660S2's velour earpads can only be described as a physical delight. The headband won't detract from your music thanks to its soft padding and just-right tension for optimal acoustic alignment. The HD 660S2's open-back design provides an incredibly comfortable environment, even during prolonged sessions. The ergonomic headband and lightweight design rule out any potential discomfort on top of your head. You'll rapidly develop an attachment to a listening experience as physically relaxing as the pleasant, non-fatiguing sound at its core.

Easy Connectivity With High-Quality Cables To Ensure Lossless Signal Transmission

Sennheiser has included two sets of beautiful cables with the HD 660S2 to accommodate your audio configuration. It has no microphonics and achieves a stable connection. The package includes a 6.3mm (Single-Ended) cable and a 4.4mm (Balanced) cable with 1.8m in length, making them compatible with most audio sources. One benefit of using the HD 660S2 with a balanced connection is that it offers an even lower noise floor and excellent dynamic range. The result is a broader soundstage, precisely controlled transients, and impossibly distinct instrument separation.

Versatile Connectivity With High-Quality Cables

Sennheiser HD 660S2 comes bundled with 2 high-quality detachable cables to upgrade cables easily. One cable features 6.3mm termination, and the other features 4.4mm termination. A 6.3 mm to 3.5 mm adapter is available along with the cable.

Open-Back Design Offers An Expansive Soundstage & Precise Imaging

The HD 660S2 has an updated coil which now matches the renowned HD 600 and HD 650 300-ohm impedance. This redesigned coil offers improved electrical damping and magnetic force for an impactful impulse response. It has significantly better accuracy, responsiveness, and resolution and twice as much sound pressure at the lowest frequencies. Sennheiser has retained extraordinary precision and balance throughout the sub-bass, mid-bass, and beyond. Extension on the low end changes everything — by creating more space for the sound. Against a deeper backdrop, highs feel more brilliant, the soundstage deeper and open, and emotions stronger with precise imaging. 

Exquisite Design With All-Day Wearing Comfort

The Sennheiser HD 660S2 is built entirely in Ireland and quickly grabs your attention due to its excellent build quality. The HD 660S2's velour earpads can only be described as a physical delight. The headband won't detract from your music thanks to its soft padding and just-right tension for optimal acoustic alignment. The HD 660S2's open-back design provides an incredibly comfortable environment, even during prolonged sessions. The ergonomic headband and lightweight design rule out any potential discomfort on top of your head. You'll rapidly develop an attachment to a listening experience as physically relaxing as the pleasant, non-fatiguing sound at its core.

Easy Connectivity With High-Quality Cables To Ensure Lossless Signal Transmission

Sennheiser has included two sets of beautiful cables with the HD 660S2 to accommodate your audio configuration. It has no microphonics and achieves a stable connection. The package includes a 6.3mm (Single-Ended) cable and a 4.4mm (Balanced) cable with 1.8m in length, making them compatible with most audio sources. One benefit of using the HD 660S2 with a balanced connection is that it offers an even lower noise floor and excellent dynamic range. The result is a broader soundstage, precisely controlled transients, and impossibly distinct instrument separation.

Versatile Connectivity With High-Quality Cables

Sennheiser HD 660S2 comes bundled with 2 high-quality detachable cables to upgrade cables easily. One cable features 6.3mm termination, and the other features 4.4mm termination. A 6.3 mm to 3.5 mm adapter is available along with the cable.

Snug Fit

Sennheiser HD 660S2 is equipped with velour ear pads for a comfortable and snug fit.

Adjustable Headband

Sennheiser HD 660S2 features a soft padded and adjustable headband to deliver a comfortable music listening experience.

Detachable Cable

Sennheiser HD 660S2 comes bundled with 2 high-quality detachable cables to upgrade cables easily.

Accessories to Get you Started

1. 6.3 mm Cable (1.8 m)
2. 4.4 mm Cable (1.8 m)
3. 6.3mm to 3.5mm Adapter
4. Carry Pouch


Driver
Dynamic Driver
Driver Configuration
38mm Dynamic Driver
Impedance
300 Ω
Plug Type
4.4mm (Balanced)
6.35mm (Single-Ended)
3.5mm (Single-Ended)
Adapter
6.3 mm (1⁄4 inch) to 3.5 mm
Frequency Response
8 – 41,500 Hz


2 Year Warranty

Don't sweat it, this Sennheiser - HD 660S2 comes with a 2 Year warranty from Sennheiser that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.

Read more about Sennheiser's warranty in India.

75 Years of German Excellence and Innovation in High-Fidelity Audio

Established in 1945, Sennheiser, a German audio company based in Wedemark, boasts a 75-year history crafting high-fidelity products like microphones and headphones. Helmed by third-generation co-CEOs Daniel and Andreas Sennheiser, the globally acclaimed company is committed to audio innovation, offering diverse audio solutions from trusted classics to cutting-edge wireless models, shaping the future of audio experiences.

With a customer-centric approach, Sennheiser focuses on fostering trust in audio equipment for an exceptional music experience, featuring iconic models like the Sennheiser HD800, HD800S, HE1, and IE series of IEMs. Today Sennheiser’s headphones and IEMs are used by the top Music Producers, Mixing and Mastering Engineers in studios across the world.

Explore Collection
Specifically: it’s built for sound quality only, so there’s little in the way of advanced features or frills, instead focusing on comfort and performance above any other concern.
In a word, the sound is effortless. It just springs forth and gently bathes you in its detail, instead of pummeling you, which is a possible side effect of closed-back headphones.
The S2 has smooth and delicious treble for high hats and higher pitched instruments. It's done completely different compared to the 600, 660S and 560S. And it's realism.
The coil matches the 300-ohm impedance of the HD 600 & HD 650. This new coil provides higher magnetic force and electrical dampening for cleaner impulse response.
The Sennheiser HD 660S2 are very good for neutral sound. They have a warm sound profile and, despite being open-back, pack more thump and rumble than their predecessor.
The waiting is finally over, as clearly HD660S2 aren’t only bassier, deeper, and punchier sounding than any other cans from the HD6XX lineup.
ViewingHeadphone-Zone-Sennheiser-HD-660S2
Sennheiser - HD 660S2 Open-Back Headphones Sale price₹ 29,990 Regular price₹ 54,990
Headphone-Zone-Sennheiser-HD-650
Sennheiser - HD 650 Open-Back Headphone Sale price₹ 24,990 Regular price₹ 49,990
Headphone-Zone-Sennheiser-HD 600
Sennheiser - HD 600 Open-Back Headphones Sale price₹ 22,990 Regular price₹ 44,990
ViewingHeadphone-Zone-Sennheiser-HD-660S2
Sennheiser - HD 660S2 Open-Back Headphones Sale price₹ 29,990 Regular price₹ 54,990
Headphone-Zone-Sennheiser-HD-650
Sennheiser - HD 650 Open-Back Headphone Sale price₹ 24,990 Regular price₹ 49,990
Headphone-Zone-Sennheiser-HD 600
Sennheiser - HD 600 Open-Back Headphones Sale price₹ 22,990 Regular price₹ 44,990
Sound Signature

Flat: Designed for studio professionals for critical reference monitoring.

Flat: Designed for studio professionals for critical reference monitoring.

Flat: Designed for studio professionals for critical reference monitoring.

Driver Configuration

38mm Dynamic Drivers

42mm Dynamic Drivers

42mm Dynamic Drivers

Design

Open-Back

Open-Back

Open-Back

Impedance

300 Ohms

300 Ohms

300 Ohms

Our Verdict

The Sennheiser HD 660S2 provides an effortless listening experience. If you have a preference for acoustic or vocal-focused music, these over-ear headphones are likely to satisfy your tastes. The quality of the midrange alone might be enough to make the purchase worthwhile, but what distinguishes them is the notable bass presence, making them a compelling option for an upgrade.

This headphone is a classic. The Sennheiser HD650 isn't a new headphone, but it's still a favourite amongst audiophiles. The sound signature can be best described as 'reference grade' because so many people over the years have used this as a benchmark for use in the studio and at home. Pair it with a decent tube amplifier to hear it sing.



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Other Details


Generic Name Headphones
Country Of Origin Ireland
Importer Details Sennheiser Electronics India Pvt. Ltd.
Address: 104 A, B, C, First Floor, Time Tower, M.G. Road, Sector-28,Gurugram,Haryana-122002
Contact No: 1800 22 3632
Net Quantity 1
Package Contents Sennheiser HD 660S2
6.3 mm Cable (1.8 m), 3. 4.4 mm Cable (1.8 m)
6.3mm to 3.5mm Adapter
Carry Pouch


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  • I Am Worth It

    For the most passionate audiophiles who demand nothing less than audio perfection 💎, these exceptional products represent the absolute pinnacle of sound reproduction technology. When I designate something in this category, it means we've identified something truly extraordinary - a piece of equipment that transcends conventional standards of excellence. Think of these as the Rolls-Royce of audio - masterpieces that don't simply meet expectations but establish entirely new benchmarks for what's possible.


    These aren't just premium products; they're timeless investments in musical excellence whose value transcends ordinary performance metrics. Each represents a fundamental redefinition of what's achievable in sound reproduction, incorporating innovations and craftsmanship that justify their exclusive status.


    When you see "👑 I Am Worth It" products, understand that you're experiencing audio perfection - these masterpieces cater to those who recognise that true excellence knows no compromise.

  • Serious Audiophiles Only

    For those who have ventured deep into high-fidelity audio 🎯, the pursuit of sonic excellence becomes an endless journey of discovery and refinement. I believe that serious audiophiles demand equipment that can satisfy the most exacting standards and deliver performance that pushes boundaries. These products represent the pinnacle of acoustic engineering, incorporating advanced technologies and meticulous craftsmanship that enable them to reproduce music with utmost fidelity.


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  • Flat Sound Signature

    I tend to describe a flat sound signature as the “studio monitor” of headphones—what goes in is what comes out. 🎚️ There’s no added flavour or colouration; it’s a true-to-source representation. Audiophiles and sound engineers who value neutrality and precision often gravitate toward this kind of tuning.


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  • Ultra-Wide Sound stage

    Do you wish to bring the concert hall to your ears 🏛️?


    I love describing ultra-wide soundstage as "audio magic" that creates a breathtaking three-dimensional environment around your head. These specialised headphones feature an exceptionally spacious soundstage that creates the illusion you're sitting in the sweet spot of a magnificent performance venue. Think of it like teleportation technology for your ears - suddenly you're not wearing headphones, you're sitting in Carnegie Hall with perfect acoustics.


    The precise instrument placement and remarkable sense of space work together to transport you directly into the music, making you feel as though you're experiencing a live performance. This creates a listening experience that's grand, enveloping, and incredibly detailed 🎭.


    When you encounter "😳 Ultra-Wide Soundstage" products, expect concert hall acoustics that make you forget you're wearing headphones through sheer spaciousness and realism.

  • Bright & Sparkly Highs

    Who says treble can't be done right ⭐?


    I tend to describe these headphones as having "magical sparkle" in the high frequencies that makes cymbals shimmer and vocals shine without ever becoming harsh. These products excel in delivering pristine, crystalline high frequencies with remarkable precision and finesse. Think of it like the difference between cheap glitter and real diamonds - both sparkle, but one does it with elegance and refinement that never hurts your eyes.


    The treble presentation is masterfully tuned to showcase delicate nuances in the upper register, offering brilliant and engaging listening without fatigue. Every cymbal shimmer, violin overtone, and vocal harmony is reproduced with exceptional clarity and natural brilliance ✨.


    When you see "✨ Bright & Sparkly Highs" products, expect extraordinary treble clarity that discovers new layers of detail while maintaining smooth, fatigue-free listening.

  • Perfect to Analyse Music

    Delve deeper into intricate musical layers 🎼!


    I believe that some headphones are like musical microscopes - they reveal details and nuances that most people never even know exist in their favourite songs. These specialised audio tools are meticulously engineered for those who seek to explore the deepest intricacies of sound, offering exceptional precision for detailed music analysis. Think of them as detective tools for music that help you uncover every hidden element in complex compositions.


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  • Incredibly Popular

    Some things deserve all the attention ⭐!


    I've found that when something becomes incredibly popular in the audio world, it's usually for very good reasons. This exceptional audio gear has earned widespread popularity by consistently delivering outstanding performance that resonates with listeners across diverse preferences and experiences. Think of it like that blockbuster movie that everyone loves - sometimes, universal appeal indicates genuine quality rather than just marketing hype.


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  • Our Team's Favourite

    Cause after all, we are audiophiles first 🎧!


    In my experience, when our entire team gets excited about something, you know it's genuinely exceptional. This audio gear has captured the hearts and minds of our seasoned experts, distinguishing itself as a standout favourite among people who test hundreds of products every year. Think of it like getting a unanimous recommendation from a panel of audio critics - when everyone agrees, you pay attention.


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  • Balanced Sound Signature

    In my experience, a balanced sound signature is like a well-cooked meal—nothing overpowering, everything in harmony. If you’re someone who listens to a bit of everything—rock one day, jazz the next—this is the tuning I’d recommend. It doesn’t boost any part of the sound unnaturally, so what you hear is often how the artist intended it. 🎧


    Here’s what’s actually happening: the headphones don’t favour bass, mids, or treble excessively. This results in a neutral, natural, and versatile sound that suits a wide variety of music genres. While it may not feel as “exciting” as some more coloured tunings, balanced headphones tend to offer the most accurate reproduction, making them a favourite among audiophiles and studio pros alike.

  • Thick Bass / Kickass Bass

    When I say kickass bass, I’m talking about bass that slaps you right in the face—in the best way possible. It’s that visceral, chest-thumping low-end that makes you feel like you’re in the front row of a concert or a nightclub. If you’re into hip-hop, EDM, Bollywood beats, or anything with a deep groove, this is where the fun begins. 🔊💥


    Here’s what’s going on technically: the low-frequency range is heavily emphasised, resulting in powerful sub-bass rumble and impactful mid-bass slam. This kind of tuning brings weight, warmth, and physicality to your music. The trade-off? It might mask some midrange detail or high-frequency sparkle—but for bassheads, the emotional payoff is more than worth it.

  • Layered and Nuanced Sound

    Imagine sitting in the second row of a grand music hall 🎼, where each instrument's placement creates a vivid sonic landscape before you. I believe these headphones recreate that precise spatial positioning, allowing you to distinctly perceive where each instrument would be on an imaginary stage. Think of it like watching an orchestra conductor - you can follow each section independently while appreciating how they work together in perfect harmony. The layered presentation ensures every element occupies its own distinct space while contributing to the whole.


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  • Sharp & Precise Details

    Are you a lover of sharp and precise details 🔍?


    I believe that detail retrieval is like having audio superpowers - suddenly, you hear things in familiar songs that you never knew existed. These premium headphones are meticulously engineered to deliver remarkably detailed and precise sound reproduction, capturing every subtle nuance with exceptional accuracy. Think of them like high-resolution cameras for your ears that reveal the finest textures and micro-details that most headphones simply miss.


    The carefully tuned drivers and advanced acoustic design ensure even the most delicate musical elements are reproduced with stunning precision. From the gentle brush of a cymbal to the subtle resonance of acoustic instruments, these products capture and present every sonic detail with remarkable accuracy 🎯.


    When you see "📌 Sharp & Precise Details" products, expect extraordinary detail resolution that reveals new layers in familiar recordings with stunning clarity and precision.

Customer Reviews

Based on 11 reviews
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A
Anson Peter (Dammam)

Sennheiser - HD 660S2

Thank you for the great rating! Your support means the world to us.

S
Sankhadeep Burman (Bengaluru)
HD660S2 is engineering at its finest.

Honestly these are the most expensive headphones I have ever tried. I have always been familiar with ANC headphones or conventional headphones where bass is the main focal point of attraction.
But the sound signature in these headphones opened a new door for me. The bass is not overwhelming and the vocals and instruments are crisp and clear. And to mention about the open back nature of the headphones, the sound stage is just marvellous.

Lately I have been enjoying listening to rock genre in these. It feels as if I am discovering the entire genre again.

We appreciate your thoughtful review so much! It’s a pleasure to know you’re enjoying the product—thank you for your support!

K
Kamal Mannar (Mumbai)

Sennheiser - HD 660S2

Thank you for the great rating! Your support means the world to us.

b
bhupinder sidhu (Bathinda)
Superb detail & clarity

I purchased it after a long research & I’m happy with my decision, I got what I’m looking for . The details & clarity of music just amazing & non fatiguing, you can listen music for long time. Thanks HPZ for amazing service as always.

Thank you for your thoughtful review!

S
Samrat Saha (Kolkata)
Stonecold Classic

Reference grade sound, its sound signature is neutral. Using with Fiio KA13.

Hi there! Thank you for leaving a review for the Sennheiser HD 660S2. We're glad to hear that you're enjoying the stonecold classic reference grade sound and neutral sound signature. The Fiio KA13 is a great choice to pair with these headphones. Happy listening!

v
vineet kumar (Chandigarh)
A perfect Gift for myself .

I just started to listen to the headphone ,when I put it off from my Head it's been 3 hours straight.went through Different Genres, all sound wonderful. using through Hipdac 3,Separation of music felt,clearly. Awesome product, Thanks ji 🙏

Hi there! Thank you so much for taking the time to leave such a wonderful review of the Sennheiser HD 660S2. We hope you continue to enjoy them. Happy listening!

R
Ranjan Sarkar (Kolkata)
Dug the [audiophile] rabbit hole again.. Sennheiser HD 660S2

TL;DR = This is NOT a review of HD 660S2, I am not an audiophile. This is about why I choose HD 660S2 instead 600 and 650.

My first Sennheiser headphone was HD 202II [closed back with fixed (3m /1̶0̶ m̶i̶l̶e̶ l̶o̶n̶g̶/ 10-feet) long cable]. Was so annoyed with long cable, but heard the Sennheiser sound signature for the first time. Then, over the coming years I had GSP 300, HD 4.50 BT; both were closed back with later being wireless bluetooth headset.

The first open-back Sennheiser I bought was HD 599 SE and realized the difference between open vs closed back headphone. My default preferred headphone type became open-back only.

HD 599 SE was serving me well; but I had the curiosity to try some audiophile-grade open-back headphone. I found Headphone Zone and bought my first entry-level audiophile open-back headphone, Sennheiser HD 560s.

Now, I knew why these are called audiophile headphones; all my favorite music tracks came alive and sounded entirely different and detailed. I realized what I was missing by using closed-back non-audiophile headphones.

HD 560s became my most favorite and daily driver headphone...
but I wanted to dig deeper into audiophile rabbit hole as I was stalking legendary Sennheiser HD 600 series for a long while but could not decide which one to buy between HD 600, HD 650, and most recently launched HD 660S2.

I scoured the internet over reddit, YouTube and so many other sites just to be informed which one is the best HD 600 series headphone. I came know about the release dates and legacy timeline of HD 600 series;

HD 600 = Released in 1997 (the "OG Legend" that started it all)
HD 650 = Released in 2003 ("Legend Evolved")
HD 660S = Released in 2017 (600 series took a new direction; some liked it, some hated it.. in other words, it is "Legend Misunderstood")
HD 660S2 = Released in 2023 (Sennheiser describes it as 660S upgrade and they did something new with it)

I have read and watched many reviews about HD 660S2 (the 600 series flagship for now); but majority of the famous reviewers were not so positive about S2; they were divided between preferring HD 600(Joshua Valour) and HD 650(DMS) over this one.

There are no physical stores near me where I can demo listen 600,650, and 660S2 for myself and decide which one I like the most; so I had to decide on my own.

I decided to go with Sennheiser's latest HD 600 series flagship; "HD 660S2" and I am in the process to realize if this is their greatest among the series.

If you read this far; thank you!
Enjoy your favorite Headphone!

Hi there! Thank you so much for taking the time to share your experience with the Sennheiser HD 660S2. We appreciate your thorough review and are glad to hear that you are enjoying the audiophile sound quality of our headphones. We understand the struggle of choosing between the different models in the HD 600 series, but we're happy to hear that you ultimately found the HD 660S2 to be the perfect fit for you. Thank you for choosing Sennheiser and happy listening!

A
A.T. (New Delhi)
This is what the original 600 should have been

It’s an absolutely brilliant upgrade over 650/600/660S

Easier to drive while being just as brilliant while being less dependent on EQ to make it shine

Everything seems to have been improved across the board

Honestly, this is one of the biggest values in audio today

This is even bigger value than 600 at 20k because the 660S2 is more palpable for the masses at large and also improves on technicalities for hardcore audiophiles

Hey there,

Thank you for taking the time to write this review, we really appreciate the genuine feedback! Your review will definitely help fellow audiophiles to make an informed decision.