Certainly one of the most widely used microphones in the world as well as a historic microphone. It features three variable diagrams (omnidirectional, cardioid and figure-of-eight ) as well as a high-pass to eliminate proximity effect and a 10-db attenuator that allows the microphone to work distortion-free up to sound pressures of 127 dB. The U87Ai develops and improves on the traditional U87i. Great flexibility of use in proximity or stereo pairs. Warmth and body on string and wind instruments. Excellent performance on piano and percussion. Unsurpassed in singing and speech.
Includes suspension EA87
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 |
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 |
1)Omnidirectional / cardioid / figure-8 2) according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, near peak; A-weighting according to IEC 61672-1, RMS 3) measured as equivalent el. input signal
Diaphragm
Large diaphragm
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