Sennheiser - HD 660S2

Open-Back Headphones

Sale price₹ 34,990 Regular priceMRP: ₹ 54,990
GET 18% GST INPUT

One of the reasons headphones and earphones in India are more expensive than overseas is because of the Goods & Services Tax in India.

Don't let the GST input go to waste especially if you can avail an offset.

All products sold on Headphone Zone carry a GST compliant invoice and all products sold include an 18% GST.

Simply enter your GST number at the time of checkout.

Browse EMI Plans

Low Cost EMI Options through Credit Cards


Other EMI Options through Credit Cards

Talk to a Headphone Guru
DELIVERY
Dispatches in

Delivery By:

7 Day Replacement Guarantee

In case you receive the Sennheiser - HD 660S2 with a manufacturing defect, please raise a return request within 7 days of delivery.

However, if you receive an incorrect / damaged / different product or one with missing accessories, please raise a return request within 24 hours of delivery. In case you receive a product with a missing, incorrect, or faulty accessory, you will be given a replacement accessory instead of the entire product.

Please make sure that the product is in the original packaging with all the accessories it came with. We'll also need an unboxing video and images of the parcel to investigate about the discrepancy. You may be asked to share images of the product and the packaging received for us to determine the damage or defect prior to approving the return request. The free replacement will be shipped only once the original order is returned.

A replacement will be issued only if:

- It is found to be defective
- It is determined that the product was not damaged while in your possession
- The product is not different from what was shipped to you
- The product is returned in original condition (with brand’s/manufacturer's box, MRP tag intact, user manual, warranty card and all the accessories therein)

READ MORE

Warranty & Services

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.

Club Audiophile

Join Club Audiophile to begin your pursuit of great sound. Earn points and save on every purchase.

READ MORE

Why Sennheiser is Special

🇩🇪

Designed in Germany

Established & Reputed

Trust us, our reputation in the audio world speaks for itself!


This headphone or gear comes from a well-respected brand known for its high-quality audio equipment, so you can be confident in your purchase.


If you see a product marked as “🎖️ Established & Reputed”, it means you're getting a top-tier device from a brand that's earned its stripes in the audio industry.

Revered by Audiophiles

Audiophiles can be really picky and tough to impress and if the audiophile community says something sounds good, you can bet it's great!


This headphone or gear has gained recognition and admiration from audiophiles, who are known for their discerning taste in high-fidelity audio. They appreciate its precision, attention to detail and its ability to deliver an immersive sonic experience.


If you see a product marked as "🙌🏻 Revered by Audiophiles", it means that it meets the highest standards of sound quality and performance, making it a top choice for anyone who values exceptional audio experiences.

Specialist

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


This headphone or gear is crafted by specialists who know their stuff, ensuring every detail is perfect.


If you see a product marked as “🌟 Specialist”, it means you're choosing a device designed by experts who specialize in creating this specific category of device.

🐣

Born in 1945

Why we love this Headphone

Premium Economy

Sensible spending and class above in quality. 


This headphone or gear offers top-notch sound and performance without much impact on your pocket, promising a delightful experience that exceeds your expectations at an economical price point.


If you see a product marked as “💎 Premium Economy," it indicates that you're getting a high-quality audio product with exceptional sound clarity and reliable performance, all at a budget-friendly price.

Serious Audiophiles Only

Diving deeper into exploring the hobby is never enough.


If you're an audiophile on a hunt for a device that meets your high standards, this is one such headphone or gear designed for discerning audiophiles like you in mind.


If you see a product marked with “🦈 Serious Audiophiles Only" we assure you that this device can match your depth of knowledge and expertise to take your passion for audio to the next level.

Great for Studio & Professionals

When you need the best to deliver your best.


This headphone or gear meets the high standards and requirements of a professional and studio environments. Plug these in and focus on doing your best work.


If you see products marked as “🎙️ Great for Studio & Professionals”, you can trust that you're getting precision, reliability, and top-tier performance, perfect for bringing your creative and professional projects to life!

⚖️

4.4mm Balanced Plug

Upgradeable Cable

Not happy with your current cable? Swap it out!


If you're searching for an in-ear monitor with a detachable design, these IEMs fit the bill.


If you see an IEM marked with "🔌 Upgradeable Cable," it means it comes with a detachable cable. You can easily swap or upgrade the cable, allowing for customization or maintenance whenever you desire.

Why it Sounds Amazing

Dynamic Driver

The dynamic powerhouse of your sound


This headphone or gear houses dynamic driver speaker unit that produces sound, delivering a punchy and energetic audio experience.


If you see a product marked with “🔈 Dynamic Driver” you're in for lively bass, clear mids and vibrant highs, making your music come alive with every beat!

Flat Sound Signature

For those on a quest to try and hear the “purest” audio possible.


This headphone or gear offers an neutral, uncoloured audio profile, perfect for purists who crave accuracy.


If you see products marked as “📏 Flat Sound Signature”, you’re in for a true-to-life listening experience, hearing your music exactly as it was recorded, without any artificial boosts or tweaks.

Crisp Vocals & Instruments

Vocals and Instruments sound too good, its like a warm hug.


This headphone or gear excels at delivering clear, clean vocals and instruments, making every sound pop.


If you see products marked as “🍿 Crisp Vocals & Instruments”, prepare for an audio experience where every word and note is perfectly articulated, letting you enjoy your music with pristine clarity and detail.

Sharp & Precise Details

Are you a lover of sharp and precise details in your music?


This headphone or gear delivers meticulous and accurate details in your audio, ideal for those who prioritise precise sound reproduction.


If you see a product marked with "📌 Sharp & Precise Details", it means this device excels in capturing fine nuances and intricacies in your music, ensuring a high level of clarity and fidelity.

Perfect to Analyse Music

Delve deeper into the Bassline, Riffs and Harmonies.


This headphone or gear is designed for those who dive deep into the nuances of sound, offering precision for music analysis.


If you see products marked as “🔍 Perfect to Analyse Music”, get ready to dissect every beat, note, and harmony with exceptional clarity, making it an ideal tool for musicians, producers, and audiophiles who crave detailed insights into their music.

Needs Amplification

I need more power to thrive.


This headphone or gear shines brightest with a bit of extra power. It’s designed to deliver top-notch performance when paired with an amplifier, giving you that full, rich sound you crave.


If you see a product marked as "🚂 Needs Amplification", it means this device is built to excel with an amp, ensuring you get the most out of your music with enhanced volume and clarity. Perfect for audiophiles who love their sound big and bold.

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!

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!

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!

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


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


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₹ 34,990 Regular price₹ 54,990
Headphone-Zone-Sennheiser-HD-650
Sennheiser - HD 650 Open-Back Headphone Sale price₹ 29,990 Regular price₹ 49,990
Headphone-Zone-Sennheiser-HD 600
Sennheiser - HD 600 Open-Back Headphones Sale price₹ 24,990 Regular price₹ 44,990
ViewingHeadphone-Zone-Sennheiser-HD-660S2
Sennheiser - HD 660S2 Open-Back Headphones Sale price₹ 34,990 Regular price₹ 54,990
Headphone-Zone-Sennheiser-HD-650
Sennheiser - HD 650 Open-Back Headphone Sale price₹ 29,990 Regular price₹ 49,990
Headphone-Zone-Sennheiser-HD 600
Sennheiser - HD 600 Open-Back Headphones Sale price₹ 24,990 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.



You May Also Like

Headphone-Zone-STAX-SR-L700 MK2Headphone-Zone-STAX-SR-L700 MK2
STAX - SR-L700 MK2 Free Headphone Zone Helix Headphone Stand with this purchase Sale price₹ 104,999 Regular price₹ 164,990
  • I Am Worth It

    Only for the most passionate and discerning audiophiles who want the very best.


    Audiophiles desire class-defining products that not only meet their needs but truly blows their expectation in quality and performance.


    If you see a product marked with “👑 I Am Worth It," rest assured that it's a timeless investment. Its value cannot be measured with ordinary benchmarks and is an indulgence only for a select few.

  • Serious Audiophiles Only

    Diving deeper into exploring the hobby is never enough.


    If you're an audiophile on a hunt for a device that meets your high standards, this is one such headphone or gear designed for discerning audiophiles like you in mind.


    If you see a product marked with “🦈 Serious Audiophiles Only" we assure you that this device can match your depth of knowledge and expertise to take your passion for audio to the next level.

  • Flat Sound Signature

    For those on a quest to try and hear the “purest” audio possible.


    This headphone or gear offers an neutral, uncoloured audio profile, perfect for purists who crave accuracy.


    If you see products marked as “📏 Flat Sound Signature”, you’re in for a true-to-life listening experience, hearing your music exactly as it was recorded, without any artificial boosts or tweaks.

  • Ultra-Wide Sound Stage

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


    This headphone or gear offers an ultra-wide soundstage, giving your music a spacious and immersive feel as if you're right there in the middle of a live performance.


    If you see a product marked with "😳 Ultra-Wide Soundstage," it means this product is designed to deliver expansive audio, making your listening experience feel grand and enveloping, perfect for those who love a broad and detailed sound.

  • Bright & Sparkly Highs

    Who says Treble can’t be done right.


    This headphone or gear shines the best for its ability to deliver crisp, clear, and shimmering high frequencies that stands out.


    If you see products marked as “✨ Bright & Sparkly Highs”, you’re in for an auditory treat, enjoying every cymbal, note, and melody with unparalleled clarity and brilliance.

  • Perfect to Analyse Music

    Delve deeper into the Bassline, Riffs and Harmonies.


    This headphone or gear is designed for those who dive deep into the nuances of sound, offering precision for music analysis.


    If you see products marked as “🔍 Perfect to Analyse Music”, get ready to dissect every beat, note, and harmony with exceptional clarity, making it an ideal tool for musicians, producers, and audiophiles who crave detailed insights into their music.

Sold out
Shure - SRH1540Shure - SRH1540
Shure - SRH1540 Closed-Back Studio Headphone Sale price₹ 51,999 Regular price₹ 52,200
Discontinued
Headphone-Zone-STAX-SRS-3100Headphone-Zone-STAX-SRS-3100
STAX - SRS-3100 Electrostatic Open-Back Earspeaker + Energiser Sale price₹ 64,990 Regular price₹ 114,990
Pre-order
Headphone-Zone-Meze-109 PROHeadphone-Zone-Meze-109 PRO
Meze - 109 PRO Open-Back Headphone Sale price₹ 76,990 Regular price₹ 79,999
  • Incredibly Popular

    Some things deserve all the attention.


    This headphone or gear is a crowd favourite, winning over fans everywhere with its undeniable audio quality.


    If you see products marked as “🥇 Incredibly Popular”, you’re opting for a tried-and-true choice that’s loved by many, ensuring you're getting something that’s proven to be awesome and widely acclaimed.

  • Our Team's Favourite

    Cause after all, we are audiophiles first!


    This headphone or gear has won the hearts of our team, standing out as a top pick among our gurus.


    If you see products marked as “💙 Our Team’s Favourite”, you're choosing a product that’s been tested, loved, and enthusiastically recommended by our team, giving you confidence that it’s a standout choice!

  • Balanced Sound Signature

    Perfectly Balanced, Accurately Presented.


    This headphone or gear delivers a perfectly balanced audio profile, with highs, mids, and lows in sweet equilibrium.


    If you see products marked as “⚖️ Balanced Sound Signature”, you’re set to enjoy a well-rounded listening experience where no single element overpowers the others, making your music sound just as the artist intended.

  • Thick Bass / Kickass Bass

    There are some headphones that just knock your socks off with high and impactful bass. There’s only one way to describe it - Kickass.


    This headphone or gear is engineered to deliver powerful and thumping bass that adds an extra punch to your music, making every beat come alive.


    If you see a product marked with "💣 Kickass Bass", it means this device is perfect for bass enthusiasts for an immersive audio experience that will make your music feel more intense and impactful.

  • Layered and Nuanced Sound

    Imagine sitting on the second row of a music hall. Instruments should sound like they are coming from different places on the stage - Layered and nuanced.


    This headphone or gear is designed to deliver a rich, detailed audio experience, with every note and subtlety coming through crystal clear.


    If you see a product marked with "🍰 Layered and Nuanced Sound," it means this device is crafted to provide an intricate soundscape, perfect for audiophiles who appreciate the depth and complexity in their music.

  • Sharp & Precise Details

    Are you a lover of sharp and precise details in your music?


    This headphone or gear delivers meticulous and accurate details in your audio, ideal for those who prioritise precise sound reproduction.


    If you see a product marked with "📌 Sharp & Precise Details", it means this device excels in capturing fine nuances and intricacies in your music, ensuring a high level of clarity and fidelity.

Customer Reviews

Based on 6 reviews
100%
(6)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
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.

M
Murali Das (Chennai)
Excellent in every way

Great comfort, light weight, superb quality and very beautiful. Music simply flows naturally. Took a while to burn in and after that its simply outstanding. Not very hard to drive but still scales up nicely with my Topping A70 Pro. Loving it.

And yes , special thanks to Raghav for the 1 Day delivery. Headphonezone rocks!

Hey there, thank you for the great review and ratings! So delighted that you are loving your purchase. Hope you had a comfortable shopping experience. Cheers!

R
Ranjeeth K (Mumbai)
660S2 is Excellent in its performance

It’s is Superb headphone. Bass is good however it’s not too much by not making fatigue. Sound staging is very clear to notice. In fact, I was able to hear all the instruments clearly. Even if I don’t concentrate on background instruments, the 660 s2 headphone will notice me about tiny instruments sounds. Overall good headphone for the one who is looking for decent bass, better sound imaging and vocal forward feature.

Great review! Thanks for taking the time to write it. We're glad to hear that our product has helped you improve your sound quality.