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Neumann U 87 Ai Condenser Wired Professional Microphone
Estimated price for orientation: 2 500 $
Category: Neumann U 87 Ai
Class:
Description Condition: Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections. See all condition definitions- opens in a new window or tab ... Read moreabout the condition
I am first and only owner of this microphone. Acquired for personal use in August 2015. The microphone in excellent condition! Absolutely has no defects, both in the technical and physical aspects. No scratches, scuffs, and the like. Never damaged or fall, did not sink, was not repaire. You will really enjoy it!Comes with all that you can see on the photos.ApplicationsThe 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 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.Acoustic featuresThe 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.Polar patternsThe 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.Electrical featuresThe letter A in the name indicates a more recent generation, as compared to the 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 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.Filter and attenuationA 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. Technical Data:Acoustical operating principle Pressure gradient transducer Directional pattern Omnidirectional, cardioid, figure-8 plus Frequency range 20 Hz ... 20 kHz Sensitivity at 1 kHz into 1 kohm 20/28/22 mV/Pa1) Rated impedance 200 ohms Rated load impedance 1 kohms Equivalent noise level, CCIR2) 26/23/25 dB1) Equivalent noise level, A-weighted2) 15/12/14 dB-A1) Signal-to-noise ratio, CCIR2) (rel. 94 dB SPL) 68/71/69 dB1)
Description
| Condition: | Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections. See all condition definitions- opens in a new window or tab ... Read moreabout the condition |
I am first and only owner of this microphone. Acquired for personal use in August 2015. The microphone in excellent condition! Absolutely has no defects, both in the technical and physical aspects. No scratches, scuffs, and the like. Never damaged or fall, did not sink, was not repaire. You will really enjoy it!Comes with all that you can see on the photos.ApplicationsThe 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 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.Acoustic featuresThe 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.Polar patternsThe 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.Electrical featuresThe letter A in the name indicates a more recent generation, as compared to the 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 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.Filter and attenuationA 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. Technical Data:
| Acoustical operating principle | Pressure gradient transducer |
| Directional pattern | Omnidirectional, cardioid, figure-8 plus |
| Frequency range | 20 Hz ... 20 kHz |
| Sensitivity at 1 kHz into 1 kohm | 20/28/22 mV/Pa1) |
| Rated impedance | 200 ohms |
| Rated load impedance | 1 kohms |
| Equivalent noise level, CCIR2) | 26/23/25 dB1) |
| Equivalent noise level, A-weighted2) | 15/12/14 dB-A1) |
| Signal-to-noise ratio, CCIR2) (rel. 94 dB SPL) | 68/71/69 dB1) |