Sennheiser · Headphones
Sennheiser HD 660S2
Sennheiser HD 660S2 is strongest when you care about home audiophile listening and open-back soundstage. At about $399, judge it by whether those strengths fix a real daily problem rather than by the longest spec sheet.
Buying verdict
Choose Sennheiser HD 660S2 if home audiophile listening matters more than chasing the absolute top-tier option. Skip it if not for commuting or travel.
Score
6.5 / 10
Reference price
$399
Released
Feb 1, 2023
Reference price, not a live offer. Editorial data date Jul 27, 2026. Specs and availability can vary by configuration, region, and retailer. Status: available.
No official product reference is published for this entry yet. Treat listed specifications as editorial reference data and confirm purchase-critical details with the manufacturer.
Should you buy it?
A practical ownership call
- Buy it if you want home audiophile listening and open-back soundstage.
- Skip it if premium anc pricing is easy to overpay for if you mostly stay home.
- Check current US street pricing before paying launch-level money.
Pros and cons
Pros
- Strong everyday fit for home audiophile listening
- Comfort holds up better on longer wear sessions
- Reference US pricing around $399 makes the trade-offs easier to evaluate
Cons
- Premium ANC pricing is easy to overpay for if you mostly stay home
- Higher-end rivals can still justify the jump if you need peak performance
- Multipoint and codec support still vary by phone ecosystem
Key specs
- Type
- Open-back wired headphones Needs confirmation
- Form Factor
- Open-back over-ear Needs confirmation
- Driver Size
- 38mm dynamic drivers Needs confirmation
- Noise Cancellation
- No ANC (open-back design) Needs confirmation
- Transparency / Ambient
- Fully open design Needs confirmation
- Sound Profile
- Natural, slightly warm audiophile signature Needs confirmation
- Battery Life
- Passive wired design Needs confirmation
- Battery With Case
- Not applicable Needs confirmation
Buying scores
Noise Cancellation
1
Sound Quality
9.3
Comfort
8.7
Battery
10
Call Quality
1
Value
8.4
Compare
Compare with similar products
Choose any headphones alternative. Curated pairs open an editorial decision; every other pair opens a specs-only comparison.
Alternatives
Sony
Sony WH-1000XM6
Choose Sony WH-1000XM6 if premium ANC matters more than chasing the absolute top-tier option. Skip it if premium price.
Apple
AirPods Max 2
Choose AirPods Max 2 if premium Apple over-ear matters more than chasing the absolute top-tier option. Skip it if expensive versus sony/bose rivals.
Popular comparisons
Sennheiser HD 660S2 vs AirPods Max USB-C: Which Should You Buy?
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Sennheiser HD 660S2 vs Sony WH-1000XM5: Which Should You Buy?
Compare Sennheiser HD 660S2 and Sony WH-1000XM5 by noise cancellation, comfort, call quality, battery life, sound tuning, app support, and return-window.
Sony WH-1000XM6 vs Sennheiser HD 660S2: Which Should You Buy?
Compare Sony WH-1000XM6 and Sennheiser HD 660S2 by noise cancellation, comfort, call quality, battery life, sound tuning, app support, and return-window.
Availability, sources, and full notes
US availability
Sennheiser HD 660S2 is tracked as a US-market option through official brand channels and mainstream electronics retailers.
Common retailers
Sennheiser, Amazon, Best Buy, Walmart, Target
Sources and verification
No official product reference is published for this entry yet.
Editorial specification note
Official manufacturer materials, launch documentation, and Snowyme editorial verification as of 2026-07-27.
Editorial price note
Sennheiser US launch and street-price patterns are tracked as editorial USD references, not live retailer checkout prices.
Specifications
18 tracked specs across 7 groups · No official product reference is published for this entry yet.
Design
- Type
- Open-back wired headphones Needs confirmation
- Form Factor
- Open-back over-ear Needs confirmation
- Weight
- Around 260g without cable Needs confirmation
| Type | Open-back wired headphones Needs confirmation |
|---|---|
| Form Factor | Open-back over-ear Needs confirmation |
| Weight | Around 260g without cable Needs confirmation |
Audio
- Driver Size
- 38mm dynamic drivers Needs confirmation
- Noise Cancellation
- No ANC (open-back design) Needs confirmation
- Transparency / Ambient
- Fully open design Needs confirmation
- Sound Profile
- Natural, slightly warm audiophile signature Needs confirmation
| Driver Size | 38mm dynamic drivers Needs confirmation |
|---|---|
| Noise Cancellation | No ANC (open-back design) Needs confirmation |
| Transparency / Ambient | Fully open design Needs confirmation |
| Sound Profile | Natural, slightly warm audiophile signature Needs confirmation |
Battery
- Battery Life
- Passive wired design Needs confirmation
- Battery With Case
- Not applicable Needs confirmation
- Charging
- No charging required Needs confirmation
- Quick Charge
- Not applicable Needs confirmation
| Battery Life | Passive wired design Needs confirmation |
|---|---|
| Battery With Case | Not applicable Needs confirmation |
| Charging | No charging required Needs confirmation |
| Quick Charge | Not applicable Needs confirmation |
Connectivity
- Bluetooth Codecs
- Wired only Needs confirmation
- Bluetooth
- Wired only Needs confirmation
- Multipoint
- Not applicable Needs confirmation
| Bluetooth Codecs | Wired only Needs confirmation |
|---|---|
| Bluetooth | Wired only Needs confirmation |
| Multipoint | Not applicable Needs confirmation |
Durability
- Water Resistance
- Not applicable Needs confirmation
| Water Resistance | Not applicable Needs confirmation |
|---|
Calls
- Microphone System
- No dedicated call mic system Needs confirmation
| Microphone System | No dedicated call mic system Needs confirmation |
|---|
Usability
- Controls
- Source/device controls only Needs confirmation
- App Support
- No companion app required Needs confirmation
| Controls | Source/device controls only Needs confirmation |
|---|---|
| App Support | No companion app required Needs confirmation |