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The Sennheiser HD 660S2 are premium open-back over-ear wired headphones featuring 42mm ultra-light aluminum transducers and a deep bass extension down to 27.5 Hz. Designed for audiophiles, gamers, and professionals, they offer a spacious soundstage, precise acoustic performance, and all-day comfort with breathable ear cushions. Crafted in Germany and Ireland, these headphones come with detachable cables and multiple adapters, ensuring versatile connectivity and durable build quality for immersive listening across music, gaming, and podcasting.





| Connectivity technology | Wired |
| Wireless communication technology | Kopfhörer mit Kabel |
| Included components | 4.4 mm cable (1.8 m), 6.3 mm cable (1.8 m), 6.3mm to 3.5mm adapter, HD 660S2 headphones, Protective Case |
| Age range (description) | Adult |
| Material | Aluminium |
| Specific uses for product | Music |
| Recommended uses for product | music |
| Compatible devices | Devices with 6.35 mm audio input or adapter compatibility |
| Control type | Media Control |
| Cable feature | Detachable |
| Item weight | 260 Grams |
| Water resistance level | Not Water Resistant |
| Package type | Protective delivery packaging with a portable carry pouch |
| Unit count | 1.0 Count |
| Style | HD 660S2 |
| Control method | Touch |
| Number of items | 1 |
| Product Dimensions | 24.2 x 18.2 x 10 cm; 260 g |
| Item model number | 700240 |
| Connector | 3.5mm Jack |
| Hardware Interface | 3.5mm Audio |
| Speaker Amplification Type | Passive |
| Material Type | Aluminium |
| Size | one size |
| Power Source | Corded Electric |
| Item Weight | 260 g |