KM 65

Common name: Neumann KM 65

Production Status: Discontinued / Vintage

The KM 65 is a special version of the KM 64 featuring the KK 65 (later named KK 85) capsule. It is a cardioid transducer with reduced sensitivity for low frequencies. KM is the acronym for “kleinmikrophon” meaning “little microphone”. The original KM family ( KM 53 – KM 54 – KM 56) was born in the 50’s as a result of the professional market request for high quality, but very small, microphones, ideal for TV productions. After ten years Georg Neumann GmbH launched a new KM tube series. The same Telefunken AC 701 k tube was used to design the new pre-amplifier and the new 21 mm capsules employed MCF made diaphragms. The new series was compatible with most of the old KM 5x series accessories, as cables, holders and PSU’s. The tube cathode coupling derived coming from the last “c” version yields lower noise figures. The KM 64 replaced the KM 54 as miniature pressure condenser microphone for professional purposes. Many capsule design improvements improved the phase response for off-axis sounds. The frequency response is virtually the same for sound sources within +- 135° (between 100 Hz  and 18 kHz). Sound sources located in a 135° circle around the microphone can be recorded with loudness variation but no changes in timbre. The KM 65 was manufactured from 1964 to 1971.