MD 403 working condition with XLR connector!
“Labor W” refers to Laboratorium Wennebostel, the original name of the Sennheiser company.
History
- 1945 – Prof. Fritz Sennheiser founded a small audio laboratory in Wennebostel, Germany.
- The company was first called Laboratorium Wennebostel, often abbreviated “Labor W.”
- Early microphones and audio gear were branded Labor W, not Sennheiser.
- 1958 – The company officially changed its name to Sennheiser electronic.
What this means for your MD 403
If your MD 403 says Labor W:
- It is an early production Sennheiser microphone.
- Likely made before or around the late 1950s–early 1960s.
- It represents the transition period from Labor W to Sennheiser branding.
This item is sold As-Described
This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.
| Listed | 2 months ago |
|---|---|
| Condition | Very Good (Used) Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more |
| Brand | |
| Model |
|
| Categories | |
| Microphone Type |
|
| Wired/Wireless |
|
| Polar Pattern |
|
Product safety information may be available here.








