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Neumann U 87 Ai Condenser Microphone Studio Set, Nickel


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  • Model: Neum36933
  • Shipping Weight: 7lbs
  • Manufactured by: Neumann


Neumann U 87 Ai Condenser Microphone Studio Set, Nickel

The Studio Set includes:

  • Windscreen
  • Cable
  • EA87 Elastic Suspension Shockmount
  • Wooden Jeweler's Box

The Neumann U 87 Ai Condenser Microphone in nickel finish is a large dual-diaphragm condenser microphone. It features three directional patterns, including omnidirectional, cardioid and figure-8. These are selectable with a switch below the head grille and the window above this switch shows the symbol of the selected characteristic. A 10 dB attenuation switch is located on the rear. It enables the microphone to handle sound pressure levels up to 127 dB without distortion. The low frequency response can be reduced to compensate for proximity effect.

The U 87 Ai is best known as a The Vocal Mic but it is a main microphone for orchestra recordings and as a spot microphone for single instruments,  and speech.

The U 87 Ai is addressed from the front. The frequency response of the cardioid and figure-8 directional characteristics are very flat for frontal sound incidence, even in the upper frequency range. The microphone can be used very close to a sound source without the sound becoming unnaturally harsh. By means of a high-pass filter, interference through subsonic and low frequencies are reduced.

The circuitry increases operational headroom of the U 87 Ai by supplying the bias voltages for the capsule through a reduced resistance. The result is a higher sensitivity of 10 dB for identical sound pressure levels, and an improved S/N ratio of 3 dB.

A switch located at the rear attenuates the sensitivity by 10 dB. When this switch is activated, the microphone accepts sound pressure levels up to 127 dB (equivalent to a sound pressure of 45 Pa) without distortion.

An additional switch at the rear allows to change the microphone's cutoff frequency. This reduces low frequency interference directly at the input of the microphone amplifier. This setting also compensates for the unavoidable bass boost that occurs with all pressure gradient transducers when they are used at close distance (proximity effect).


  • Cardioid characteristic maintains a smooth frequency response at a distance of 30 to 40 cm, and the figure-8 characteristic at a distance of 15 to 20 cm.
  • Variable large diaphragm microphone
  • Pressure-gradient transducer with double membrane capsule
  • Omnidirectional, cardioid, and figure-8 characteristics
  • Switchable low frequency roll-off
  • Switchable 10 dB pre-attenuation
  • Great as a main or as a support microphone


Operating Principle

Pressure Gradient
Transducer Condenser
Polar Pattern Cardioid, Figure 8, Omnidirectional
Frequency Range 20 Hz to 20 kHz
Signal to Noise Ratio 71: dB CCIR
69: dB CCIR
68: dB CCIR
82: dB A-Weighted
80: dB A-Weighted
79: dB A-Weighted
Equivalent Noise Level 23 dB CCIR
25 dB CCIR
26 dB CCIR
12 dB A-Weighted
14 dB A-Weighted
15 dB A-Weighted
Maximum SPL 117 dB SPL 0.5%
127 dB SPL 0.5% with 10 dB Pad Engaged
Impedance 200 ohms
Load Impedance 1 kOhms
Sensitivity 28 mV/PA @ 1 kHz into 1 kOhms
22 mV/PA @ 1 kHz into 1 kOhms
20 mV/PA @ 1 kHz into 1 kOhms
Power Requirements 48 V+/- 4 V
Pad Yes, 10 dB
Output Connectors 3-Pin XLR
Operating Current Consumption 0.8µA

UPC 615104070226. 

Manufacturer Info



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