Massdrop x Sennheiser HD 6XX
| Brand | Sennheiser |
| Manufacturer | Massdrop |
| Function | Headphones |
| Produced | 2016-present |
| Country | Romania |
| Form Factor | Headphone - Circumaural |
| Weight | 9.2 oz. (260 g.) |
| Frequency Response | 10 Hz – 41 kHz |
| Total harmonic distortion | < 0.05% |
| Nominal impedance | 300 ohm |
| Cable Length | 6 ft. (1.8 m.) |
| Channels | 2 Channel |
| Connections |
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| Links | massdrop HD 6XX page |
| Notes | Massdrop edition of Senheiser HD 650 circumaural headphones (2003-present) |