User manual for Neumann U 87 Ai Condenser Microphone U 87 AI MT STEREO
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- Manufacturer: Neumann
- Basic description and contents of package
- Product classification: Pro Audio - Recording - Large Diaphragm Condenser
- Safety instructions
- Startup and operation of the large diaphragm condenser
- Tips for setting up your Neumann
- Settings and expert assistance
- Contact Neumann service
- Warranty information
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User manual for the Neumann U 87 Ai Condenser Microphone U 87 AI MT STEREO
The user manual for the Neumann U 87 Ai Condenser Microphone U 87 AI MT STEREO provides
necessary instructions for the proper use of the product Pro Audio - Recording - Large Diaphragm Condenser.
The black U 87 Ai Condenser Microphone from Neumann 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 used as a main microphone for orchestra recordings, as a spot microphone for single instruments, and extensively as a vocal microphone for all types of music 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).
The 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.
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Additional parameters of the Neumann U 87 Ai Condenser Microphone U 87 AI MT STEREO:
| 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 |
| Length || 7.87 " (200 mm ) |
| Diameter || 2.20" (56 mm) |
| Weight || 1.10 lb (500 g) |
| Package Weight || 10.8 lb |
| Box Dimensions (LxWxH) || 16.221 x 14.016 x 6.614" |
The user manual for the Neumann U 87 Ai Condenser Microphone U 87 AI MT STEREO can be downloaded in .pdf
format if it did not come with your new large diaphragm condenser, although the seller is
required to supply one. It is also quite common that customers throw out
the user manual with the box, or put the CD away somewhere and then can’t find it.
That’s why we and other Neumann users keep a unique electronic library
for Neumann large diaphragm condensers,
where you can use our link to download the user manual for the Neumann U 87 Ai Condenser Microphone U 87 AI MT STEREO.
The user manual lists all of the functions of the Neumann U 87 Ai Condenser Microphone U 87 AI MT STEREO,
all the basic and advanced features and tells you how to use the large diaphragm condenser.
The manual also provides troubleshooting for common problems. Even greater
detail is provided by the service manual, which is not typically shipped with the product,
but which can often be downloaded from Neumann service.
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to download a user manual or service manual, ideally in .pdf format. These pages
are created by you – users of the Neumann U 87 Ai Condenser Microphone U 87 AI MT STEREO. User manuals are also
available on the Neumann website under Pro Audio - Recording - Large Diaphragm Condenser.
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