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The Sennheiser HD 660S2 wired headphones combine audiophile-grade open-back sound with 42mm transducers and ultra-light aluminum voice coils, delivering detailed highs, rich mids, and deep bass down to 27.5 Hz. Designed for comfort with breathable ear cushions and premium build quality from Germany and Ireland, these headphones include detachable cables and adapters for versatile use across professional and personal audio setups.





| 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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