Sennheiser HD 660S2

8 reviews

Apr, 2025

Positive
sound (4)
comfort (4)
design (2)
mids quality (1)
soundstage (1)

Negative
treble quality (2)
size (1)
price (1)

General overview
Price comparison

alaTest has collected and analyzed 8 reviews of Sennheiser HD 660S2. The average rating for this product is 4.2/5, compared to an average rating of 4.0/5 for other Headphones for all reviews. Comments about the soundstage and durability are generally positive. The design and sound are also appreciated. Some have doubts about the size and price, and views are divided on the bass quality.

comfort, sound, design, durability, soundstage

treble quality, price, size

We analyzed user and expert ratings, product age and more factors. Compared to other Headphones the Sennheiser HD 660S2 is awarded an overall alaScore™ of 91/100 = Excellent quality.

Review analysis

(Based on 8 reviews)

Expert Reviews

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Showing 1 - 6 of 6 Show Reviews: in English | in other languages (1)

Expert review by : What Hi-Fi? (whathifi.com)

Sennheiser HD 660S2 review

Will Sennheiser's latest audiophile headphones become a cult classic?

Breathtaking midrange ; Relaxed, undemanding listen ; Smooth presentation

Soft bass ; Can be bettered for dynamics and detail

The Sennheisers have a charming smoothness to their sound, but their soft bass and lack of dynamic thrust hold them back.

May, 2023

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Expert review by (t3.com)

Sennheiser HD 660S2 review: open-back headphones go big on bass

If you're looking for open-backed headphones with big bass then Sennheiser's second-gen HD 660S are well worth a look

Properly made, comfortable and durable ; Burly, spacious and informative sound ; Balanced or unbalanced connections

Treble sounds are slightly inhibited ; Not fans of inferior sources ; Awkward 6.3mm-3.5mm adapter

There’s ‘unfashionable’ and then there’s wired headphones. But where outright performance in nearly every meaningful audio department is concerned, the Sennheiser HD 660S2 have plenty to recommend them - as long as your source of music is up to the...

Mar, 2023

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Expert review by : Tim Gideon (pcmag.com)

Sennheiser HD 660S2 Review

To justify their high-end price, the wired Sennheiser HD 660S2 headphones achieve a spacious, neutral-leaning listening experience without sacrificing bass depth.

May, 2023

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Expert review by : James Barber (techhive.com)

Sennheiser HD 660S2

Sennheiser's new open-back, audiophile-quality over-ear headphones deliver an awesomely open sound stage and are decided not neutral tuning.

Fantastic low end ; If they fit you, you’ll find they are extremely comfortable ; Exceptional overall sound presentation

Folks with large heads might find their fit is too tight ; Soft-sided carry bag offers too little protection ; Pricey

Sennheiser has released a headphone that’s sure to generate controversy in the audiophile community, but the company has delivered a truly engaging listening experience for everyone not obsessed with specs and benchmarks.

Feb, 2023

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Expert review by : Marcus (headfonics.com)

Sennheiser HD 660S2 Review Sennheiser HD 660S2 Review — Headfonics

Today, we review the Sennheiser HD 660S2, which is a second-generation set of circumaural open-back 300Ω 42mm dynamic driver headphones. It is currently priced at $499.95 Disclaimer: This was sent to us as a sample Today, we review the Sennheiser HD...

Improved sub-bass performance ; Excellent choice for OTL amplifier owners ; Modern cable terminations

Upper-mids at times needs a bit of EQ for presence ; High lateral clamping pressure when brand new

The Sennheiser HD 660S2 is a clear technical step up on the HD 660S. It offers superior extension on both ends of the spectrum, stretching the presentation taller and deeper and injecting some improved weight and dynamics over the original tuning. The...

Sep, 2023

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Expert review by : Lasse Svendsen (lbtechreviews.com)

Review: Sennheiser HD660S2 | Sophisticated And Musical From Sennheiser

They look the same, but the sound of the latest Sennheiser headphones is better than ever.

Beautiful tonal balance with great detail, and more transparent soundstage than its predecessor. Tighter and better defined bass reproduction.

Some people may find the fit tight.

The Sennheiser HD660S2 are a very successful update to one of our favourite headphones. They deliver a more open and transparent soundstage than its predecessor without radically changing the sound signature. You still get a comfortable and balanced...

Mar, 2023

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