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  Home > Microphones > Condensor - Large Diaphragm >

  Neumann U87Ai Microphone
  Neumann U87Ai Microphone
Neumann U87Ai Microphone
Neumann U87Ai Microphone
 
ProAVmax Price: $2,999.00



Availability: In Stock
Product Code: NMN-U87AI

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Description
 

NEUMANN U 87 Ai Microphone

The Neumann U 87 Ai is probably the best known and most widely used Neumann studio microphone. It is equipped with a large dual-diaphragm capsule with three directional patterns: omnidirectional, cardioid and figure-8. These are selectable with a switch below the headgrille.

A 10 dB attenuation switch is located on the rear. It enables the Neumann U 87 Ai to handle sound pressure levels up to 127 dB without distortion. Furthermore, the low frequency response can be reduced to compensate for proximity effect.

NEUMANN U 87 Ai Microphone - FEATURES

NEUMANN U 87 Ai Microphone - APPLICATIONS

  • Variable large diaphragm microphone
  • Pressure-gradient transducer with double membrane capsule
  • The studio microphone classic
  • Three directional characteristics: omni, cardioid, figure-8
  • Switchable low frequency roll-off
  • Switchable 10 dB pre-attenuation
  • Ideal as main and as support microphone in the most differing recording situations
  • The Neumann U 87 Ai condenser microphone is a large diaphragm microphone with three polar patterns and a unique frequency and transient response characteristic.
  • Users recognize the microphone immediately by its distinctive design. It is a good choice for most general purpose applications in studios, for broadcasting, film and television.
  • The Neumann U 87 Ai is used as a main microphone for orchestra recordings, as a spot mic for single instruments, and extensively as a vocal microphone for all types of music and speech.

    These are just some of the most common applications. We recommend additional experimentation to gain maximum use from this microphone.

NEUMANN U 87 Ai Microphone - ACOUSTIC FEATURES

The Neumann U 87 Ai is addressed from the front, marked with the Neumann logo. 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 interferences through subsonic and low frequencies are reduced remarkably.

 

NEUMANN U 87 Ai Microphone - FILTER AND ATTENUATION:

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). The cardioid characteristic maintains a smooth frequency response at a distance of 30 to 40 cm, the figure-8 characteristic even at a distance of 15 to 20 cm.

 

NEUMANN U 87 Ai Microphone - POLAR PATTERNS:

The dual-diaphragm capsule is elastically mounted and protected by a large headgrille. A switch below the headgrille selects the three directional patterns: omnidirectional, cardioid and figure-8. A window above this switch shows the symbol of the selected characteristic.

 

NEUMANN U 87 Ai Microphone - ELECTRICAL FEATURES:

The letter A in the name indicates a more recent generation, as compared to the Neumann U 87 i microphones that were built from 1967 to 1986. Modifications apply to the electronic components of the microphone only; the capsule remained unchanged. The present-day circuitry increases the operational headroom of the Neumann 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.


NEUMANN U 87 Ai Microphone - GENERAL SPECS:

Acoustical operating principle:
......
Pressure gradient transducer
Directional pattern:
......
Omnidirectional, cardioid, figure-8 plus (* = Directional Pattern Specific)
Frequency range:
......
20 Hz - 20 kHz
Sensitivity:
......
20/28/22 mV/Pa @ 1 kHz into 1 kohm *
Rated impedance:
......
200 ohms
Rated load impedance:
......
1000 ohms
Equivalent SPL CCIR 468-3: ...... 26/23/25 dB *
Equivalent SPL DIN/IEC 651: ...... 15/12/14 dB-A *
S/N ratio CCIR 468-3: ...... 68/71/69 dB *
S/N ratio DIN/IEC 651: ...... 79/82/80 dB *
Maximum SPL for THD 0.5%: ...... 117 dB (Cardioid)
Maximum SPL for THD 0.5% with Preattenuation: ...... 127 dB
Maximum output voltage: ...... 390 mV
Dynamic range of the microphone amplifier: ...... 105 dB (Cardioid)
Supply Voltage: ...... 48 V +/- 4 V
Current Consumption: ...... 0.8 mA
Matching Connector: ...... XLR 3F
Weight: ...... 500 g
Diameter: ...... 56 mm
Length: ...... 200 mm

Downloads & Links:
Brochure
(359kb, pdf)
(853kb, pdf) (Web Link)
 

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