We do maintenance and capsules cleaning of the Neumann SM 69 fet vintage mic.
The frequency response comparative check and breath test before and after service will be done.
Keep in mind,
that washing usually NOT will be done for other capsule designs called "edge termination", because their construction it is immune to dust and moisture. Washing these capsules can be done for remove heavy stubborn dirt only to improve the HF-response if it's really necessary.

Thanks to:
Vadim Bondarchik (video production and editing)
Edgar Vartanyan (logo animation and final screen)
Jimmy Woodser Blues Band (music 0:30 - 0:52, 4:57 - 9:18)
Sergey Belenkiy & Vlad Frolov (music 1:05 - 4:57)
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Idea, camera, repair performance - Anthony Scott
Music on the final screen - Anthony Scott & Vlad Frolov