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Korby Blue Microphone Blue Tube
Used – Mint
Originally $3,100, now $2,450 ($650 savings)

In mint conditions.

This is what Nordic Audio Labs say about the NU-47V:

A twenty year old dream finally comes true with this microphone. The critical mea- surements for the body and grille were taken from my personal long body Neumann U47 and the sound and performance is fine tuned to exactly match the 60-year old M7 capsule and VF14 tube combination.

There are two noticeable differences compared to the old microphone. First, the microphone can be remotely switched into figure-of-eight mode from the power supply. Inside the microphone there's a relay that mechanically switches the rear diaphragm in and out of the circuit. The fig-8 mode is very useful for Blumlein type stereo configurations.

Second, the noise level is significantly lower (at least 6-7dB) while maintaining the same smooth sounding noise spectrum, typical for tube microphones.


  • Pickup pattern: Cardioid and fig-8 
  • Frequency response: 35Hz - 17kHz 
  • Sensitivity: 29,2 mV/Pa
  • Self noise: 12,4 dB(A)
  • Max SPL: 129dB
  • Power requirements: 230 or 120 VAC 50/60Hz 
  • Dimensions: 245 x 60 mm
  • Weight: 643 g
  • Output format: XLR 3-pin (from PSU)

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Listed4 years ago
ConditionMint (Used)
Mint items are in essentially new original condition but have been opened or played.Learn more
  • NU-47V
Made In
  • Finland

WideRange Tones

Sacile, Italy
Joined Reverb:2015

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