U 87 Ai studio microphone: Detail view of the head grille

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In a word: The Neumann classic. Three directional characteristics and switchable pre-attenuation ensure suitability for a wide range of applications.
Zoom: U 87 Ai studio microphone
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
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
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1)Omnidirectional / cardioid / figure-8
2) according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
3) measured as equivalent el. input signal



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