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Sennheiser HD660S2 - Headphones

Reviews Sennheiser HD660S2

Interested in reviews of Sennheiser HD660S2? It got 4.5 out of 5 stars from our customers. Find specific customer reviews of Sennheiser HD660S2 below. We will appreciate if you also share your experiences with Sennheiser HD660S2 after purchasing.
469.90 €
In stock 5 pcs
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User Reviews

Petr, Praha 12-Modřanyflag
Rated 28/03/2026, variant Sennheiser HD660S2
Verified purchase
There's nothing to solve here. Symmetry in packaging. I use with DAP and the headphones are fantastic.
sound
processing
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Oldřich, Dolní Kalnáflag
Rated 23/01/2026, variant Sennheiser HD660S2
Verified purchase
I replaced my 30 year old HD 545 reference with these headphones and even though I'm waiting for a new headphone amp, they sound great even from regular Spotify.
The cons are not directly related to the headphones, but to the store itself. I bought them for the price of 12 290, -, but the invoice came to 14085, - and even now I can see the original price on the e-shop. Well, in the end, after an agreement and three days of trying to get an answer, they made it cheaper.
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Josef, Praha 6flag
Rated 22/01/2026, variant Sennheiser HD660S2
Verified purchase
Compared to the HD-600, the bass is accentuated, but I find it subjectively more natural with the HD-600.
Quality sound and workmanship
Slightly more comfortable than the HD-600
I find the bass response of the HD-600 more faithful
Price
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Adéla, Olomouc 9flag
Rated 21/10/2025, variant Sennheiser HD660S2
Verified purchase
The sound is fine and I liked it better than the HD490 Pro
Relatively poor quality earpieces
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Michal, Praha 8flag
Rated 05/11/2024, variant Sennheiser HD660S2
Verified purchase
Top sound quality: The headphones deliver detailed and balanced sound that even discerning listeners will appreciate. Thanks to the open design, reproduction is natural and spatial.
Compatible with Mojo 2 Poly amplifier: Unlike some closed systems such as Apple's AirPods Max, the Sennheiser HD 660S2 can be easily connected to external amplifiers, allowing their full potential to be exploited.
Comfort for long term listening: The ergonomic design and quality materials ensure comfort even when worn for extended periods, making them ideal for long listening sessions.
Quality construction: The headphones are robust and durable, which is a testament to the precision craftsmanship and durability.
cables contribute to flexibility and adaptation to different listening situations.
Open vs. closed construction: The Sennheiser HD 660S2 with open design offer a more natural sound compared to the closed AirPods Max.
Compatibility with external devices: Unlike the AirPods Max, which are part of Apple's closed ecosystem and cannot be easily connected to external amplifiers, the Sennheiser HD 660S2 make it easy to connect to a variety of audio devices.
Sound quality: Although the AirPods Max offer high-quality sound, the Sennheiser HD 660S2 provide more detailed and faithful reproduction, which is especially noticeable when listening in conjunction with the Mojo 2 Poly amplifier.
The package does not include a case, only a cloth bag.
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Michal, Hlavní město Praha Hájeflag
Rated 08/09/2024, variant Sennheiser HD660S2
Verified purchase
I had used ones from Alza and worked in them for about a week in the studio. I was pleasantly surprised by the result. I tested several models and this one won for me. I recommend trying them for a week and you'll see that you get them too. Hmmm - could Alza give me a discount for advertising; ) But seriously - it's worth it.
The absolute top in its price range
Indispensable headphones for the recording studio
They're a little sharper, but they're great at revealing every imperfection
If you don't like the price and don't know them, buy used. I've had them, and I buy the funky ones. I'm glad there's this option. The used stock ones play great too.
Lightweight, comfortable, no sweat on the ears and no fatigue even after several hours of composing
For sound engineers, I recommend as a reference headphone for monitor speaker setups
Maybe the price, but there's an option for thirds for those with deep pockets
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Companyflag
Rated 18/04/2024, variant Sennheiser HD660S2
Verified purchase
suitable for big beat, but you won't enjoy the classics on it. No matter what you do, it creates a sound ball that comes down.
sound compared to other products and manufacturers, but it does not match the price.
with a symmetrical input cable and a decent preamp, they are relatively playable: -)
it's worth buying a decent preamp. You can buy it from about 6k. Like the Aune X1sGT.
price. Rather than spend so much money on this inferior compromise, I would save up for a more decent headphone - it's really worth the extra money - like the HD-800S - the difference is priceless: -)
it's not worth it with an unbalanced cable.
suitable for big beat, but you won't enjoy classical or jazz on it. (If you listen to contemporary world pop, buy anything significantly cheaper - it doesn't matter)
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Ladislav, Chomutovflag
Rated 16/01/2024, variant Sennheiser HD660S2
Verified purchase
I longed for a headphone upgrade for my FIIO Q3 MQA amplifier. In the end I chose these and I don't regret it. I have them connected via the balanced output and they sound great. I started to like the music on them, which didn't appeal to me before. It took a while for them to come into full play, but this is apparently normal for headphones of this quality. I was worried about the higher impedance, but I usually have the potentiometer a little past half. Although a higher power amplifier would be appreciated by the headphones.
great sound
although the open designs do not disturb the surroundings too much during normal listening
higher price
they have to play out
due to their open design, they are not suitable for noisy environments, you can hear almost everything in them
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Vít, Uherský Brod 1flag
Rated 12/07/2023, variant Sennheiser HD660S2
Verified purchase
great sound
(after a while when the padding softened) comfortable
shortened cables included compared to the previous version
they really let sound in (some even amplify it) and out, which is a feature of open headphones
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David, Francova Lhotaflag
Rated 09/06/2023, variant Sennheiser HD660S2
Verified purchase
I use with external DAC and Phono Preamp with HP output and the sound is in a word perfect.
The headphones sit very comfortably on the head and fit very well on the ears.
Nothing, the price corresponds to the quality of sound and workmanship. I wouldn't change it.
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