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The Sennheiser HD 660S2 are wired, open-back over-ear headphones designed for audiophiles and professionals seeking refined acoustic performance. Featuring 42mm ultra-light aluminum transducers, they deliver precise highs and deep bass down to 27.5 Hz. Crafted with premium materials in Germany and Ireland, these headphones offer long-lasting durability and comfort with breathable ear cushions and detachable cables for versatile use 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 |
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