RMS Audioworks RMS47
Multi-Pattern Tube Condenser Microphone
The RMS47 is a recreation of the Neumann U47. It is a handbuilt microphone, utilizing components selected to best reproduce the sound of the original U47.
Two capsules are available: a K47 and an M7. Both capsules were offered by Neumann, and both share a backplate design. The K47 uses screwed-on clamping rings (O.D. 34mm), while the M7 famously uses glued-on diaphragms on a 32mm backplate.
The RMS47 uses AMI’s BV8R transformer, a 6.5:1 ratio transformer wound with nickel alloy lamination to the original U47 transformer specs.
The tube is described as a VF14ER, about which more details are forthcoming. (The U47’s VF14 steel tube has not been manufactured for over 50 years; non-microphonic VF14s are rare and very expensive, necessitating the use of alternative parts in U47 recreations.)
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The mic was released in 2012.
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