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The Sennheiser HD 660S2 headphones deliver audiophile-grade open-back sound with a wide 8 Hz to 41.5 kHz frequency range and 42mm dynamic drivers. Designed for professionals and enthusiasts, they offer exceptional comfort, premium build quality, and a detachable cable for versatile use across music, gaming, and podcasting.






| Control Method | Touch |
| Control Type | Media Control |
| Unit Count | 1.0 Count |
| Item Weight | 630 Grams |
| Water Resistance Level | Not Water Resistant |
| Is Electric | No |
| Antenna Location | music |
| Compatible Devices | Smartphone |
| Cable Features | Detachable |
| Additional Features | stereo pairing |
| Enclosure Material | Aluminum |
| Specific Uses For Product | Music |
| Headphone Folding Features | Over Ear |
| Earpiece Shape | Oval |
| Headphones Ear Placement | Over Ear |
| Style Name | Headphones |
| Theme | Music |
| Color | Black |
| Connectivity Technology | Wired |
| Headphone Jack | 1/4 inch TRS, 4.4 mm TRRRS |
| Frequency Range | 8 Hz - 41.5 kHz |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 42 Millimeters |
| Impedance | 300 Ohm |
| Noise Control | Sound Isolation |
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