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.
About This Headphones
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 42 mm
- Impedance ohms 300
- Open closed back open
Overview
Performance
Pros & Cons
Pros
- Strong build (92th percentile) 92th
- Strong sound (88th percentile) 88th
- Strong comfort (66th percentile) 66th
Cons
- Below average mic (16th percentile) 16th
- Below average user sentiment (20th percentile) 20th
- Below average anc (31th percentile) 31th
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 |
Value & Pricing
vs Competition
| Spec | Sennheiser HD 660S2 | Sony WH-1000XM6 WH-1000XM6 | Bowers & Wilkins Px8 S2 Px8 S2 | Audio-Technica M-Series ATH-M50xBT2 | Bose QuietComfort Ultra QuietComfort Ultra | JBL Live 770NC |
|---|---|---|---|---|---|---|
| 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 | 45 | - | 40 |
| Impedance Ohms | 300 | 48 | - | 38 | 32 | 32 |
| Wireless | false | true | true | true | true | true |
| Active Noise Cancellation | false | true | true | false | true | true |
| Open Closed Back | open | closed | closed | closed | closed | closed |
| Bluetooth Version | - | 5.3 | 5.3 | 5.0 | 5.3 | 5.3 |
| Battery Life Hours | - | 30 | 30 | 50 | 24 | 65 |
| Compare | Compare | Compare | Compare | Compare |
| Product | Anc | Mic | Build | Sound | Battery | Comfort | User Sentiment | Connectivity | Social Proof |
|---|---|---|---|---|---|---|---|---|---|
| Sennheiser HD 660S2 | 30.5 | 15.8 | 92.2 | 87.5 | 44.5 | 65.7 | 19.7 | 37 | 42.1 |
| Sony WH-1000XM6 WH-1000XM6 Compare | 97.5 | 91.5 | 92.2 | 90.2 | 72.7 | 79.5 | 0 | 99.7 | 93.1 |
| Bowers & Wilkins Px8 S2 Px8 S2 Compare | 97.5 | 99.4 | 95.9 | 99.4 | 72.7 | 50.6 | 87.5 | 97.5 | 98.7 |
| Audio-Technica M-Series ATH-M50xBT2 Compare | 30.5 | 78.8 | 77 | 94.3 | 83.9 | 86.7 | 96.4 | 93 | 98.7 |
| Bose QuietComfort Ultra QuietComfort Ultra Compare | 87.4 | 78.8 | 95.9 | 48 | 69.2 | 79.5 | 70.3 | 99.3 | 93.1 |
| JBL Live 770NC Compare | 97.5 | 78.8 | 97.2 | 85 | 91.6 | 50.6 | 70.3 | 99.9 | 98.7 |
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
