• About This Mic
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Since its original development in 1946, the ubiquitous TELEFUNKEN U47 has been the microphone of choice for generations of recording professionals. The first condenser microphone to offer selectable polar patterns, the U47 is instantly recognizable. From Frank Sinatra to the Beatles, the sonic performance of the U47 is legendary as a vocal microphone. Huge presence, with an extended frequency response that is extraordinary on any signal source, the U47 has been a classic sonic benchmark for over 60 years.

TELEFUNKEN | USA is proud to offer several variations on the original design. All microphones in the U47 / U48 series are constructed entirely by hand in our Connecticut, USA manufacturing facility. All versions are supplied with custom manufactured M7 diaphragms, BV8 output transformers, wooden microphone boxes, custom flight cases, and fully transferable warranties.

The original manufacturers chose the TELEFUNKEN VF14 vacuum tube for use in the U47 in 1946. Unfortunately, manufacturing of the VF14 ceased in 1939, and these tubes are impossible to source in quantity today. Beginning in 1962, Neumann offered a Nuvistor replacement kit for the VF14, which, while it was fully functional, produced a sonic response that was not as desirable as that of the original VF14 and required minor modification to the original circuit.

TELEFUNKEN |USA has gone to great lengths to offer comparable substitutes for the VF14 that preserve the original sonic response. Our custom made VF14k vacuum tube, utilized in the U47AE, is made to directly replace the original VF14 in the U47 circuit. It offers equal sonic performance to the VF14, and fits into the original tube socket with no modifications required to the original circuit.

The TELEFUNKEN EF14 was a lower voltage, but physically identical, vacuum tube, manufactured at the same time as the VF14. When properly powered, via a customized power supply, it offers sonic response that is comparable to the VF14. While still in short supply, TELEFUNKEN | USA has been fortunate to obtain limited quantities of the EF14, which makes it feasible to utilize the EF14 in the U47M microphone.


Compare this mic with other TELEFUNKEN Elektroakustik mics.

To purchase a TELEFUNKEN U47M (EF14) contact one of our resellers.

Reviews / Press

TELEFUNKEN Factory Service - TELEFUNKEN offers restoration services for all TELEFUNKEN microphones. We do not sell any internal microphone housings or capsules without factory service performed in-house. Call TELEFUNKEN Elektroakustik for a return authorization number and to discuss work needed on your microphone system.

Please call 860-882-5919 for more information.

TypeCondenser Pressure Gradient
CapsuleM7 - dual sided gold sputtered center terminated
Frequency Range20Hz / 20kHz
Polar PatternCardioid and Omni
Sensitivityapprox 1.2 mvolts per dyne / cm sq
Output Impedance200 ohms stock / 50 ohms switchable
Maximum SPL138 dB
Non Linear Distortionless than or equal to 0.5% at 100 dyne / cm sq
Self Noise24dB (a-weighted)
Tube TypeTelefunken EF14 metal tube
Power TypeDedicated Power Supply
Size9 3/4" (248mm) length x 2 1/4" (57mm) diameter
Weight22oz (624g)




Visit our artists, engineers, and venues section for more info.

Accessories for the  U47M (EF14)  include:

M 840

25' Accusound CX-7 Quad-Shielded Cable with Microphone Stand-Mount Swivel Connector for U47/U48



Combination locking flight case fits U47 or U48



Microphone Oak Wood Box with Diamond Logo for U47/U48 Long Body


M 740

Clasping Shockmount for U47/U48 [64 mm Dia. Microphone Body]



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