Sennheiser HD 600 vs HD 660S2

What published reviews say about each, where the two differ, and who each one suits.

Summed up from 16 published reviews

Sennheiser

HD 600

The HD 600 is a well-built, neutral open-back headphone best suited to critical listening in a quiet room with a capable amplifier.

Best for: Critical listeners with an amplifier, seeking neutral sound in quiet rooms
Skip it if: You need portability, isolation, wireless, or visceral sub-bass

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What reviewers say about the Sennheiser HD 600

Sennheiser

HD 660S2

The HD 660S2 offers detailed, natural open-back sound, but its high price and amplifier demands narrow its appeal.

Best for: Critical listening at home with a capable DAC/amp.
Skip it if: You need wireless, strong isolation, or effortless phone driving.

PriceToday's price on AmazonView on Amazon

What reviewers say about the Sennheiser HD 660S2

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Specs side by side

Spec	Sennheiser HD 600	Sennheiser HD 660S2
Fit	Over-ear	Over-ear
Connection	Wired	Wired
Noise cancelling	No	No
Best for	Studio, Music	Studio, Music
Microphone	No mic	No mic
Ear cups	Open-back	Open-back

Rows where the two differ come first.

What reviewers like, and what they don't

Sennheiser HD 600

Natural, balanced sound with clear mids and vocals 2 3 6 7
Open, airy presentation provides spacious soundstage and imaging 1 2 3 4
Generally comfortable for long sessions after initial fit adjustments 1 2 3 4
Replaceable cable and ear pads aid longevity 1 2
Open-back design provides little sound isolation 1 4 5 8
Capable amplifier is needed for best performance 2 3 5 8
Bass impact is disputed; some listeners find sub-bass restrained 1 2 3 5
Long cable and awkward connector can hinder use 1 2 3 4

Sennheiser HD 660S2

Detailed, balanced sound emphasizes clear mids, vocals, and instruments. 1 2 3 4
Open-back design creates expansive soundstage and immersive imaging. 1 2 3 4
Lightweight fit is generally comfortable for extended listening. 1 2 3 4
Replaceable wired connection offers balanced and unbalanced cable options. 3 4
Open-back leakage and weak isolation suit only quiet spaces. 1 3 4 5
A capable amplifier is needed for optimal performance. 2 3 5 6
Some users experience pressure from tight, stiff clamping. 3 5 7 8

Ranked in our guides

Guide	HD 600	HD 660S2
Best wired headphones and earbuds	#10	#3
Best studio headphones	#7	#3
Best open-back headphones	#7	#3

Sources

We don't test products ourselves. This page sums up 16 published reviews, read on October 21, 2026; each point above links to the reviews that make it.