Beyerdynamic DT 990 Pro vs Sennheiser HD 660S2

Updated Jun 2026 · Scored by the Let’s Compare Data Engine · How we score

The Beyerdynamic DT 990 Pro and Sennheiser HD 660S2 are closely matched at 26 and 25/100. The Beyerdynamic DT 990 Pro edges ahead on Comfort & Build, while the Sennheiser HD 660S2 leads on value — pick the one whose strengths match what you'll actually use.

Sound quality isn't scored yet (we have no measured audio data), so the score covers features, battery, noise cancelling and build.

Verdict

Our overall take, at a glance

Beyerdynamic DT 990 Pro and Sennheiser HD 660S2 are closely matched

Beyerdynamic DT 990 Pro

Sennheiser HD 660S2

Watch-outs

Compromises to know before you buy

Beyerdynamic DT 990 Pro

No microphone — you can't take calls.

Sennheiser HD 660S2

No microphone — you can't take calls.

Winner by category for Beyerdynamic DT 990 Pro vs Sennheiser HD 660S2
Category	Beyerdynamic DT 990 Pro	Sennheiser HD 660S2	Winner
Noise Cancelling	0	0	Tie
Wireless	15	15	Tie
Battery	0	0	Tie
Comfort & Build	52	48	Beyerdynamic DT 990 Pro
Connectivity	15	15	Tie

In-depth analysisAI

AI-generated from the cited sources — may be incomplete or inaccurate; verify important details before deciding · generated Jun 2026.

Beyerdynamic DT 990 Pro

The Beyerdynamic DT 990 Pro is an open-back headphone designed primarily for studio monitoring, mixing, and content creation. Handcrafted in Germany, this long-standing model is characterized by its high impedance and highly durable construction. It is built for audio professionals and enthusiasts who require an expansive acoustic presentation at an accessible price point.

Best for Critical audio mixing and editing in controlled, quiet studio spacesBest for Listeners who prioritize long-term serviceability and easily repairable…

Pros

Highly modular physical design with easily replaceable parts
Open-back architecture delivers an expansive, spacious soundstage
Acoustic profile is highly responsive to user equalization

Cons

High impedance requires dedicated amplification to drive the headphones effectively
Open-back housing provides virtually no environmental sound isolation

Source

Beyerdynamic - WikipediaProvides details on Beyerdynamic's German manufacturing heritage and company history.

Video — reviews used (3)

Highlights the headphone's high impedance, lack of isolation, ease of equalization, and replaceable components.

Generated Jun 30, 2026

Sennheiser HD 660S2

The Sennheiser HD 660S2 is a reference headphone model known for its clear, detailed, and warm sound signature. The design includes rich black velour earpads, and the headphones are noted for being lightweight. It provides impressive vocal clarity in the midrange.

Best for vocal trackingBest for classical musicBest for rock

Pros

Features a fuller and warmer bass response than the original HD 660S
The sound is described as clear, crisp, and detailed without sounding overly analytical
Provides excellent detail and separation, with vocals prominently featured
Is noted for being comfortable for long listening sessions due to light weight and earpads

Cons

Can have a rather tight clamping force out of the box
May not be suitable for genres requiring extremely thunderous bass (e.g., EDM or rap)

Value for Money

Which is the better deal for the price

Pre-filled with launch prices where known — enter today's price for an up-to-date check. Use the same currency for both.

Beyerdynamic DT 990 Pro

Check Price on Amazon

Sennheiser HD 660S2

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Physical Comparison

Weight, side by side

Beyerdynamic DT 990 ProSennheiser HD 660S2

Sennheiser HD 660S2 is 10 g (4%) heavier than Beyerdynamic DT 990 Pro.

Review Videos

Hand-picked expert reviews for each product

Detailed Specifications

The full spec sheet, side by side

Wireless

Feature	Beyerdynamic DT 990 Pro	Sennheiser HD 660S2
Wireless	No	No
Supported Codecs	N/A	N/A

Comfort & Build

Feature	Beyerdynamic DT 990 Pro	Sennheiser HD 660S2
Weight	250 g4% less	260 g
Folding Design	No	No
Water Resistance	N/A	N/A
Dimensions	N/A	15 × 20 × 10 cm

Connectivity

Feature	Beyerdynamic DT 990 Pro	Sennheiser HD 660S2
Wired Connection	3.5mm + 6.35mm adapter	6.35mm + 4.4mm balanced
Detachable Cable	No	Yes
Built-in Microphone	No	No

Specification Note

Specifications are compiled from official manufacturer data and other reliable internet sources. Some features may vary by region or model configuration.

Frequently Asked Questions

Common questions about Beyerdynamic DT 990 Pro vs Sennheiser HD 660S2 comparison

They are closely matched: Beyerdynamic DT 990 Pro scores 25/100 and Sennheiser HD 660S2 scores 24/100 in our overall comparison — within 1 point. Neither is a clear winner overall, so the decision comes down to the specific features and price that matter most to you.

Beyerdynamic DT 990 Pro and Sennheiser HD 660S2 are compared side by side above across every spec in the headphones category — including performance, features and design — each scored 0–100 so you can see exactly where one leads the other. Our overall scores are 25/100 for Beyerdynamic DT 990 Pro and 24/100 for Sennheiser HD 660S2.

At launch, Beyerdynamic DT 990 Pro was the more affordable option ($179) versus Sennheiser HD 660S2 ($599). Weigh that against the overall scores (25/100 vs 24/100) and the value-for-money meter above to judge whether the higher-rated model justifies its price for your needs. Current retail prices vary — check the retailer.

It's close — Beyerdynamic DT 990 Pro (25/100) and Sennheiser HD 660S2 (24/100) score almost the same. Pick based on price and the individual specs that matter most to you; the comparison above shows where each one pulls ahead.