Sennheiser HD 660S2
Its 300-ohm impedance and 42mm vented magnet drivers extend sub-bass down to 8Hz with doubled pressure for precise low-end monitoring. The open-back design with plush ear cushions and detachable cables ensures fatigue-free listening during long studio sessions. Best for mixing engineers and audiophiles who need to hear the lowest piano notes and kick drum transients in a natural, relaxed soundstage.
form factor over-ear
driver type dynamic
driver size mm 42
impedance ohms 300
open closed back open
39 Overall Score
Price £0
No listings available
Snapshot
Pros & Cons
Pros
- Strong build (92th percentile) 92th
- Strong sound (87th percentile) 87th
- Strong comfort (65th percentile) 65th
Cons
- Below average mic (15th percentile)
- Below average user sentiment (19th percentile)
- Below average anc (30th percentile)
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews — so you can see whether early praise held up.
Owner sentiment has cooled since launch
72/100Our AI sentiment read
Based on 5 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Design
| Form Factor | over-ear |
| Open/Closed | open |
| Foldable | No |
| Ear Cushion | velour |
| Headband | Metal |
Audio
| Driver Type | dynamic |
| Driver Size | 42 |
| Freq Min | 8 |
| Freq Max | 41500 |
| Impedance | 300 |
| Hi-Res Audio | Yes |
| Codecs | Sennheiser HD 660S2 - Wired Audiophile Stereo Headphones with Deep Sub Bass, Optimized Surround, Transducer Airflow, Vented Magnet System and Voice Coil – Black (Renewed) |
| Surround | Sennheiser HD 660S2 - Wired Audiophile Stereo Headphones with Deep Sub Bass, Optimized Surround, Transducer Airflow, Vented Magnet System and Voice Coil – Black (Renewed) | Sennheiser HD 660S2 - Wired |
Noise Control
| ANC | No |
| Transparency | No |
Connectivity
| Wireless | No |
| Wired Connector | 3.5mm |
| Detachable Cable | Yes |
Microphone
| Microphone | No |
Features
| Touch Controls | No |
| Gaming Mode | No |
vs Competition
| Spec | Sennheiser HD 660S2 | Sony WH-1000XM6 WH-1000XM6 | Bowers & Wilkins Px8 S2 Px8 S2 | JBL Live 770NC | TOZO HT3 HT3 | Bose QuietComfort Ultra QuietComfort Ultra |
|---|---|---|---|---|---|---|
| Form Factor | over-ear | over-ear | over-ear | over-ear | over-ear | over-ear |
| Driver Type | dynamic | dynamic | dynamic | Dynamic | dynamic | Dynamic |
| Driver Size (mm) | 42 | 30 | 40 | 40 | 40 | - |
| Impedance Ohms | 300 | 48 | - | 32 | 16 | 32 |
| Wireless | false | true | true | true | true | true |
| Active Noise Cancellation | false | true | true | true | true | true |
| Open Closed Back | open | closed | closed | closed | closed | closed |
| Bluetooth Version | - | 5.3 | 5.3 | 5.3 | 6.0 | 5.3 |
| Battery Life Hours | - | 30 | 30 | 65 | 90 | 24 |
| Compare | Compare | Compare | Compare | Compare |
| Product | Anc | Mic | Build | Sound | Battery | Comfort | User Sentiment | Connectivity | Social Proof |
|---|---|---|---|---|---|---|---|---|---|
| Sennheiser HD 660S2 | 30.4 | 15.4 | 92.4 | 87.4 | 44 | 65.3 | 19.4 | 36.5 | 44 |
| Sony WH-1000XM6 WH-1000XM6 Compare | 97.5 | 91.3 | 92.4 | 90.1 | 72.2 | 79.3 | 0 | 99.7 | 83.1 |
| Bowers & Wilkins Px8 S2 Px8 S2 Compare | 97.5 | 99.4 | 95.9 | 99.4 | 72.2 | 50.2 | 87.1 | 97.4 | 97.5 |
| JBL Live 770NC Compare | 97.5 | 78.5 | 97.2 | 84.8 | 91.5 | 50.2 | 70.1 | 99.9 | 91.5 |
| TOZO HT3 HT3 Compare | 87.3 | 85.1 | 95.9 | 98.9 | 96.9 | 50.2 | 96.2 | 96.6 | 91.5 |
| Bose QuietComfort Ultra QuietComfort Ultra Compare | 87.3 | 78.5 | 95.9 | 47.9 | 68.5 | 79.3 | 70.1 | 99.3 | 66.1 |
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
