Neumann U 87 AI-MT-STEREO Factory-matched stereo set includes
Neumann U 87 AI-MT-STEREO Factory-matched stereo set includes two U 87 Ai mt with EA 87 mt in Mic Briefcase (MATT BLACK) / Neumann U 87 AI-STEREO Factory-matched stereo set includes two U 87 Ai with EA 87 in Mic Briefcase (NICKEL)
The Neumann U 87 AI-MT-STEREO comes in Matt Black color while the Neumann U 87 AI-STEREO comes in Nickel. It is a large dual-diaphragm condenser microphone. It comes featuring three directional patterns, that includes omnidirectional, cardioid and figure-8. These are selectable along with a switch below the head grille and the window above this switch is showing the symbol of the selected characteristic. A 10 dB attenuation switch is placed and can be found on the rear. It comes enabling the microphone for handling sound pressure levels up to 127 dB without distortion. The low frequency response is capable to be reduced for compensating for proximity effect.
The Neumann U 87 AI is designed to be 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 Neumann U 87 AI is designed addressed from the front. The frequency response of the cardioid and figure-8 directional characteristics are made very flat for frontal sound incidence, even in the upper frequency range. The microphone is capable to 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 made reduced.
The circuitry is designed increasing 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.
A switch is placed and can be found 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.
- 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|
|Polar Pattern||Cardioid, Figure-8, Omnidirectional|
|Frequency Range||20 Hz to 20 kHz|
|Maximum SPL||117 dB SPL|
|Load Impedance||1000 Ohms|
|Sensitivity||28 mV/Pa at 1 kHz into 1 Kilohms
22 mV/Pa at 1 kHz into 1 Kilohms
20 mV/Pa at 1 kHz into 1 Kilohms
|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
|Output Connectors||1 x XLR 3-Pin|
|Operating Voltage||48 V ± 4 V|
|Operating Current Consumption||0.8 µA|
|Dimensions||ø: 2.2 x L: 7.87" / ø: 55.88 x L: 199.9 mm|
|Weight||1.1 lb / 500 g|