Sennheiser

HD 660S2

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

Summed up from 8 published reviews

PriceToday's price on AmazonView on Amazon

Affiliate link · we may earn a commission

What reviewers like

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

What they don't

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

Best for

Critical listening at home with a capable DAC/amp.

Skip it if

You need wireless, strong isolation, or effortless phone driving.

Where it fits

use: MusicStudio
fit: Over-ear
connection: Wired
noise cancelling: Not needed

Specs

Fit: Over-ear
Connection: Wired
Noise cancelling: No
Best for: Studio, Music
Microphone: No mic
Ear cups: Open-back

Also worth a look

Questions

Is the Sennheiser HD 660S2 worth it?

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

What do reviewers like about the Sennheiser HD 660S2?

Detailed, balanced sound emphasizes clear mids, vocals, and instruments. Open-back design creates expansive soundstage and immersive imaging. Lightweight fit is generally comfortable for extended listening. Replaceable wired connection offers balanced and unbalanced cable options.

What are the downsides of the Sennheiser HD 660S2?

Open-back leakage and weak isolation suit only quiet spaces. A capable amplifier is needed for optimal performance. Some users experience pressure from tight, stiff clamping.

Who should buy the Sennheiser HD 660S2?

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

Sources

We don't test products ourselves. This page sums up 8 published reviews, read on October 21, 2026; each point above links to the reviews that make it.