Neumann KM54 & 56 power supplies

Marlowe · 10th September 2006

Will a KM54 power supply work on a KM56?

Fletcher · 10th September 2006

Yes.

They were both designed to work with N-52 supplies... they all run AC-701/k tubes... just like the M-49, the M-50 the Schoeps M-221, the Telefunken ELA M 250/251 [non "E" version].

The idea was that any/all of these mics would have interchangable power supplies, it was a "broadcast standard" for the time... which was why the M-269c was invented... the 269c was the AC-701/k version of the U-67 that was designed specifically to work with the N-52 power supply standard. Neumann couldn't sell U-67's to broadcast facilities because they used an EF-86 tube which didn't comply with the N-52 PSU standard.

With that said... some mic have had their cable pinouts modified/altered/fvcked up since their birth so you might want to check the cable to make sure it is pinned up properly to work in an interchangable manner.

Peace.

Bob Olhsson · 10th September 2006

The power supplies were built into the German Radio consoles along with directional pattern controls.

Marlowe · 10th September 2006

Cool, thanks!

10th September 2006	#1
Marlowe Lives for gear Joined: Jan 2004 Location: NY Posts: 703 Thread Starter	Neumann KM54 & 56 power supplies Will a KM54 power supply work on a KM56?

10th September 2006	#2
Fletcher member no 666 Joined: Jun 2002 Location: Durham, NC Posts: 10,108	Yes. They were both designed to work with N-52 supplies... they all run AC-701/k tubes... just like the M-49, the M-50 the Schoeps M-221, the Telefunken ELA M 250/251 [non "E" version]. The idea was that any/all of these mics would have interchangable power supplies, it was a "broadcast standard" for the time... which was why the M-269c was invented... the 269c was the AC-701/k version of the U-67 that was designed specifically to work with the N-52 power supply standard. Neumann couldn't sell U-67's to broadcast facilities because they used an EF-86 tube which didn't comply with the N-52 PSU standard. With that said... some mic have had their cable pinouts modified/altered/fvcked up since their birth so you might want to check the cable to make sure it is pinned up properly to work in an interchangable manner. Peace. __________________ CN Fletcher Professional Affiliations: R/E/P Professional Recording Engineer and Producer forums - serious hobbyists welcome SoundPure.com mwagener wrote on Sat, 11 September 2004 14:33 We are selling emotions, there are no emotions in a grid Roscoe Ambel once said: Pro-Tools is to audio what fluorescent is to light

10th September 2006	#3
Bob Olhsson Motown legend Joined: Jun 2002 Location: Songwriter Gulch, Nashville TN Posts: 10,876	The power supplies were built into the German Radio consoles along with directional pattern controls. __________________ Bob's room 615 562-4346 Georgetown Masters 615 254-3233 Music Industry 2.0 Interview

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