Who says closed-back headphones can’t sound that open? The closed-back HD 620S is for audio enthusiasts seeking a distraction-free listening experience without compromising on natural, airy, and detailed sound. Featuring a remarkably open baffle and angled transducers, it replicates the spatial imaging of loudspeakers while keeping listening sessions secluded.
Superior Design and Features
Closed-back Excellence: Closed-back headphones with steel-reinforced ear cup covers for distraction-free listening sessions.
Precision Sound: Reference-grade 42 mm angled transducers with a 38 mm diaphragm deliver speaker-like imaging with natural detail retrieval and an expansive soundstage.
Enhanced Clarity: Ultra-light 150-ohm aluminum voice coil for enhanced clarity and accuracy in audio reproduction.
Comfort and Durability: Lightweight chassis with steel-reinforced headband sliders and artificial leather ear pads with internal venting for long-term durability and all-day comfort.
Secluded Listening Experience
Enjoy undisturbed privacy while listening to exceptional open, natural sound. The HD 620S lets you experience detailed, spacious sounds like never before in closed-back headphones. The stainless-steel reinforced ear cup covers not only add timeless appeal but also provide a private listening session regardless of your surroundings. Ideal for those who prefer sofa concerts over kitchen talks, offering a distraction-free experience with true-to-life vocals and natural, airy sound.
Innovative Closed-Back Design
Open sound in a closed-back design might seem impossible, but the HD 620S makes it a reality. Combining the DNA of the HD 600 and 500 series, the HD 620S brings the best of both headphone families to a closed chassis. The reference-grade 42 mm angled transducers with a 38 mm diaphragm and ultra-light 150-ohm aluminium voice coil deliver exceptional impulse response, expanding the stereo image to an almost panoramic soundstage. This unique design preserves the detailed, smooth sound the 600 series is known for, setting a new standard for closed-back headphones.
Comfort and Longevity
The HD 620S offers timeless design, function, and comfort. The lightweight chassis is bolstered by premium touches that ensure its unique acoustic signature for years to come. Robust, steel-reinforced headband sliders and ear cup covers add long-term durability. In contrast, spacious ear cup covers and supple ear pads made from artificial leather provide superb acoustic isolation and all-day comfort. The HD 620S is ready for hours of fatigue-free, intimate listening.
Immersive Listening for Any Passion
Who doesn’t sometimes want to just switch off and become immersed in their own world undisturbed? With the HD 620S, you can stay in the same room without compromising on privacy or natural, expansive sound. Whether you love gaming, amateur music production, or simply listening to exceptional audio, the HD 620S elevates your experience with extraordinary detail retrieval and spatial awareness.
Understanding Frequency Response
Reference sound in a closed chassis: The frequency is shown in Hertz (Hz) on the X-axis, with bass response from 20-300 Hz, vocal range from 300 to 3000 Hz, and treble from 3000 to 20,000 Hz. The Y-axis shows relative loudness in dB SPL. The HD 620S offers a bass response louder than the HD 600, resulting in a closer to neutral, true-to-life sound.
In The Box
Sennheiser HD620S Closed-Back Wired Audiophile Headphones
Detachable Cable (6')
3.5mm to 1/4" Adapter
Limited 2-Year Manufacturer Warranty
Warranty Period: 2 Year from the date of Invoice
Covered: Manufacturing Defects Only
Website: https://en-in.sennheiser.com/service-support-contact-service-centers-in-india
Contact No: 1800 22 36 32
Email Id: in-info@sennheiser.com
Sennheiser is a well-known brand in the audio industry. They offer a wide range of products catering to both audiophiles and casual listeners. Their products include open back and closed back audiophile headphones, in-ear monitors, ANC headphones, and true wireless earbuds. They are known for their exceptional sound quality and durability. Whether you're a professional musician or just a music enthusiast, Sennheiser has something for everyone.
Tuning flexibility thanks to interchangeable nozzles
Soundstage depth isn’t exceptional (though width / height are decent)
The black nozzle for brighter tuning is a bit aggressive.
KEFINE Klean IEM
09/30/2025
Akash Nath
Awesome Product
This is my first IEM..so I'm not knowledgeable enough to decide if it's the best or not..but definitely a good buy..go for it guys..and don't forget to pair it up with a good dac....
KZ Castor Pro IEM With Mic
09/30/2025
Aditya Shetty
Nice upgrade cable for the price
I got these cables for my CHU II because I broke the stock cable.
For the following reasons I would say it's a solid recommendation for it's price.
The cables themselves are not as heavy as they might look and more importantly, they are not "stiff, ear hooks are also fairly comfortable.
Also, they don't particularly retain shapes and seem to be freer and tangle free.
The quality on the cables is good, it's been almost two weeks, and I haven't seen any quality issues come out.
The mic quality on calls is decent, very serviceable.
Don't expect upgrade cables to change the tonality of your IEMs.
These don't have a chin-slider, I would have loved to see that.
(THE COOLEST PART, they include a free hard case and tbf it's actually a good case better than some listed even for around 300INR out there)
AUDIOCULAR C03 8-Core Silver-Plated Cable with 3.5mm Jack & Built-In Microphone For IEMs
09/27/2025
Anonymous
Tuned like a blessing formy ears
Tuned like a blessing formy ears, Go for it
SIMGOT EW300 IEM
09/27/2025
Hari Charan
For the price... it's performs seriously... no joke
I use the moondrop free dsp mini with my hidizs mp145 planar iems and the response is amazing. Micro details are good mids are just right. The bass is tight. You'll love it.
MOONDROP FreeDSP Mini CS43198 Portable DAC & AMP - 3.5mm
09/26/2025
Abhishek Survase
First EarBuds Ever!
After searching for around 7 days, I finally ordered these. I have received them just an hour ago. Will update the review in few days. Initial impressions are too good.
MOONDROP SPACE TRAVEL 2 Ultra True Wireless Earbuds
09/25/2025
Devadath SL
THE BEST BUDGET IEM UPGRADE CABLE
The Audiocular C03 is an exceptional value for money upgrade cable in the market with a decent mike and in line controls along with amazing build quality thank you The Audio Store for fast Delivery
AUDIOCULAR C03 8-Core Silver-Plated Cable with 3.5mm Jack & Built-In Microphone For IEMs
09/22/2025
Subhansh Gupta
Best Hybrid
Good for Gaming and Multimedia both
SIMGOT EW200 IEM
09/22/2025
soli
smooth audio with wide and clear soundstage
these iems are so clear with wide soundstage and these are small and lightweight and sits flat in ear without building out if u use small tips according to your ear , this is my second iem the first one was kz edx and it was bass heavy after listening to this , i find out that this is what we call iem neutral soundstage. this dsp version allows you to set a fix eq to the dsp and now you can use same eq anywhere you want if it is laptop or tablet or pc without installing an eq software, the app also have community driven eq sharing where individuals can share there eqs you can pick eqs from there to suit your preference
TANCHJIM Bunny Type-C DSP Plug with Mic IEM
09/21/2025
Soumyadeep Mondal
Fabulous Purchase
It is really really good and the vocals clarity is much more higher than the traditional default 3.5mm ports of smartphones. I think, it is a great investment.
AUDIOCULAR SPARK Hi-Res Portable DAC Dongle CX31993 + MAX Amp - Black
09/21/2025
Vijay B. Chavan
Best product
Anc & Transparency mode nice, Battery hrs fullfill & Mic quality top notch,
Soft touch Key function.
KZ AN01 ANC Enabled True Wireless Adapter for IEMs
09/21/2025
Manish M
Best IEM under 5K
Best IEM under 5K. You'll be surprised by the value you're getting.
KEFINE Klean IEM
09/19/2025
Pritom Barman
It's a great and adorable dac at the same time
It's a great and adorable dac at the same time. It fulfills the need without a heavy toll on the pocket.It comes with a 3.5mm to type C converter with High res and moreover a Usb C to A converter.
AUDIOCULAR SPARK Hi-Res Portable DAC Dongle CX31993 + MAX Amp
09/19/2025
Sajal Senapati
Budget Price, Audiophile-Level Performance
While I wouldn’t call myself an audiophile, the Moondrop Space Travel 2 delivers an impressive listening experience that exceeds expectations at this price point. The sound is clean and well balanced, with excellent clarity and instrument separation. Bass is present but not overpowering, and the overall loudness feels well tuned. My only real criticism lies with the case that is the open-top design makes handling the earbuds a little fiddly, and there’s a learning curve to inserting and removing them smoothly.
MOONDROP SPACE TRAVEL 2 True Wireless Earbuds
09/18/2025
Pranay S
a great iem around 2k
crisp details and decent bass. overall, perfectly balanced sound. loving it. Also kudos to the quick one day delivery.
TANCHJIM Bunny Type-C DSP Plug with Mic IEM
09/17/2025
STAY TUNED ON EVERY PLATFORM
Brand Warranty
100% Original products with brand warranty
7 Days Replacement
On all orders*
Fast & Free Shipping
Ships in 24 Hours*
Secure Payments
Visa, Mastercard, EMI, Net Banking, UPI, BHIM, Wallet's
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Anonymous
Great!!
TANCHJIM Bunny IEM With Mic - 3.5mm
ric ric
value for price
Very good value for its price range,
Solid build, durable metal shells
Comfortable fit and decent ergonomics
Tuning flexibility thanks to interchangeable nozzles
Soundstage depth isn’t exceptional (though width / height are decent)
The black nozzle for brighter tuning is a bit aggressive.
KEFINE Klean IEM
Akash Nath
Awesome Product
This is my first IEM..so I'm not knowledgeable enough to decide if it's the best or not..but definitely a good buy..go for it guys..and don't forget to pair it up with a good dac....
KZ Castor Pro IEM With Mic
Anonymous
Klean
Sound is Klean and good build quality
KEFINE Klean IEM
Manthan
Trusted product and great
Trusted product and great quality
7HZ x Crinacle Zero 2 IEM
Mohanakumar Nair
I recently bought the Audiocular D07 Slim
I recently bought the Audiocular D07 Slim, and for the price, it’s a fantastic little DAC. The sound is much cleaner and more detailed compared to my phone’s inbuilt audio. It works great with IEMs like mine, giving clear mids, tight bass, and smooth treble. The build is slim and solid, and overall, it feels like great value for money. Moreover, the customer support from 'The Audio Store' is highly admirable & I must say, best online store in India to buy Audio gadgets.
AUDIOCULAR D07 CX31993 USB Portable DAC & Amp
Aditya Shetty
Nice upgrade cable for the price
I got these cables for my CHU II because I broke the stock cable.
For the following reasons I would say it's a solid recommendation for it's price.
The cables themselves are not as heavy as they might look and more importantly, they are not "stiff, ear hooks are also fairly comfortable.
Also, they don't particularly retain shapes and seem to be freer and tangle free.
The quality on the cables is good, it's been almost two weeks, and I haven't seen any quality issues come out.
The mic quality on calls is decent, very serviceable.
Don't expect upgrade cables to change the tonality of your IEMs.
These don't have a chin-slider, I would have loved to see that.
(THE COOLEST PART, they include a free hard case and tbf it's actually a good case better than some listed even for around 300INR out there)
AUDIOCULAR C03 8-Core Silver-Plated Cable with 3.5mm Jack & Built-In Microphone For IEMs
Anurag Sharma
Good product
I think it is good for starting with iems
KZ Acoustics EDX Pro Wired IEM With Mic
Anonymous
Tuned like a blessing formy ears
Tuned like a blessing formy ears, Go for it
SIMGOT EW300 IEM
Vijay Jadhav
Hidden Gem for Audiophiles in Pune
We are truly fortunate to have a dedicated IEM & Headphone store in Pune catering to audiophiles. It’s rare to find a place where you can audition gear before buying, especially when it comes to in-ear monitors (IEMs) and headphones.
My Experience
Coming from a Disc Jockey (DJ) background, I visited the store with a specific goal — to find a budget-friendly IEM that offers a clean, neutral, and slightly bright sound signature.
The team at the store is very knowledgeable, patient, and truly understands audio preferences. I explained what I was looking for, and they listened carefully to my expectations and guided me through various options. Some IEMs were too bass-heavy or had a V-shaped signature, which didn’t match my taste.
After I told them I was looking for tight bass and a brighter tuning, they recommended the 7Hz Zero — which turned out to be an excellent choice for the price. The soundstage and imaging were surprisingly good for a budget IEM.This review is about my experience visiting the store and their service, not a detailed review of the IEM itself — I’ll keep that short for now.
All in all, I had a great experience, and I highly recommend the store to anyone who values sound quality and wants to try before buying.
Tips for Visitors
- Carry your collection of test songs
Familiar tracks help you judge sound more accurately.
-Be clear about the sound signature you’re looking for Neutral, V-Shaped, U-Shaped, Mid-Centric (Vocal-Focused) ,Bass-Boosted (Warm), Bright / Treble-Focused, Harman Target
-If considering a DSP version of an IEM,
Make sure to test the DSP model itself, not just the 3.5mm version, as the tuning may differ.
Overall - Store is a must-visit for audiophiles in Pune. Whether you’re a beginner or experienced listener, the ability to try before you buy makes all the difference. The staff are friendly, informed, and genuinely care about helping you find the right sound for your needs.