| Form Factor | Headphone - Circumaural |
| Signal Path | Passive Hardware |
| Notes | Serial production of the first dynamic headphones, the DT 48, starts. They were in production till the end of 2012. |
| Form Factor | Headphone - Circumaural |
| Signal Path | Passive Hardware |
| Notes | Serial production of the first dynamic headphones, the DT 48, starts. They were in production till the end of 2012. |