The U 87 Ai condenser microphone is a large diaphragm microphone with three polar patterns and a unique frequency and transient response characteristic.

Specifications

• Acoustical operating principle — Pressure gradient transducer
• Directional Pattern — Omnidirectional, cardioid, figure-8
• Frequency Range — 20 Hz ... 20 kHz
• Sensitivity at 1 kHz into 1 kohm — 20/28/22 mV/Pa ± 1 dB (Omni/cardioid/8)
• Rated Impedance — 200 ohms
• Rated load impedance — 1 kohms
• Equivalent noise level, CCIR — 26/23/25 dB (Omni/cardioid/8)
• Equivalent noise level, A-weighted — 15/12/14 dB-A (Omni/cardioid/8)
• Maximum SPL for THD 0.5% — 117 dB (cardioid)
• Maximum SPL for THD 0.5% with preattenuation — 127 dB
• Signal-to-noise ratio, CCIR (re. 94 dB SPL) — 68/71/69 dB (Omni/cardioid/8)
• Signal-to-noise ratio, A-weighted (re. 94 dB SPL) — 79/82/80 dB (Omni/cardioid/8)
• Maximum output voltage — -6 dBu
• Supply voltage (P48, IEC 61938) — 48 V ± 4 V
• Current consumption (P48, IEC 61938) — 0.8 mA
• Matching connector — XLR 3 F
• Weight — 500 g
• Diameter — 56 mm
• Length — 200 mm