Neumann U 87 Ai Stereo Set

Neumann U 87 Ai Stereo Set

Includes two U87 condenser microphones.Also included are a pair of shock mounts and a rugged, road-worthy storage case.

The 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 microphone to handle sound pressure levels up to 127 dB without distortion. The U 87 Ai condenser microphone is a large diaphragm microphone with three polar patterns and a unique frequency and transient response characteristic.

Features:
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

Technical Specifications:
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)
Signal-to-noise ratio, A-weighted2) (rel. 94 dB SPL)     79/82/80 dB1)
Maximum SPL for THD 0.5%3)     117 dB (cardioid)
Maximum SPL for THD 0.5% with preattenuation3)     127 dB
Maximum output voltage     390 mV
Dynamic range of the microphone amplifier (A-weighted)     105 dB
Supply voltage (P48, IEC 61938)     48 V ± 4 V
Current consumption (P48, IEC 61938)     0.8 mA
Matching connectors     XLR3F
Weight     500 g
Diameter     56 mm
Length     200 mm