Neumann KM 54a 1957 - Silber

Vintage Neumann KM 54a Tube Microphone (1957) - Low Serial #961 - Fresh Official Neumann Factory Service & Warranty!

Up for sale is a holy grail of acoustic instrument recording: a legendary Neumann KM 54a small-diaphragm tube condenser microphone, manufactured on December 2, 1957.This is an exceptionally rare find for collectors and high-end studios alike. It features low matching numbers (Serial No. 961 with Capsule Head No. 332) and comes complete with its original vintage blue velvet jewelry box and the original historical Neumann certificate booklet.FRESH FACTORY SERVICE DIRECTLY BY NEUMANN (July 2026)
Unlike most vintage microphones on the market that carry high technical risks, this unit has just returned from an official Georg Neumann GmbH Authorized Service center (Inspected and signed by Neumann tech on July 29, 2026).The following work was performed to bring this mic back to 100% factory specifications:

• Full acoustic and electrical performance measurement and inspection.
• Professional cleaning of the ultra-sensitive KK54 pure nickel capsule and capsule mounting assembly.
• Cleaning of all housing parts.
• Replacement of small wear-and-tear parts for preventive maintenance.
• Complete laboratory re-calibration.

WARRANTY: Thanks to the official factory service, this microphone comes with a two-year warranty on calibration and spare parts directly from Georg Neumann GmbH (valid until July 2028). The original stamped and signed documentation booklet is included in the sale!Sound & Features:
Equipped with the famous Telefunken AC701k subminiature tube and a 0.7-micron nickel diaphragm, the KM 54a delivers unmatched transient response, tight low-end, and a silky, open top-end. It is widely considered the absolute gold standard for recording acoustic guitars, pianos, violins, and orchestral spot-miking.Condition:
Excellent vintage condition. The body shows beautiful, authentic patina consistent with its age, but no nasty dents or damage. The documentation is incredibly clean. [Note: Please specify here if a power supply (PSU) and cables are included or if it is just the microphone and box!]Shipping & Terms:
The microphone will be packed with professional care and shipped fully insured with tracking worldwide. Local pickup is also welcome. Import duties and taxes outside the EU are the buyer's responsibility.Feel free to message me with any questions or serious offers!