U 87 Ai
Large-diaphragm condenser studio microphone with switchable omni, cardioid and figure-8 patterns, a switchable pad and low cut, and a transformer-balanced FET output. Aimed at vocals, speech and general studio recording.
- Three patterns: omni, cardioid, figure-8
- Switchable pad and low cut
- Transformer-balanced FET output
- Max SPL 127 dB with pad
- Self-noise 12 dB-A (cardioid)
- 48 V phantom powered, XLR 3 F
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The U 87 Ai is a pressure-gradient large-diaphragm condenser microphone first introduced in 1967. It has three directional patterns (omnidirectional, cardioid and figure-8), plus a switchable pad and a switchable low cut, so it can be set up for sources from close vocals to room and overhead positions.
Its capsule uses the same dual-diaphragm design as the earlier U 67. The head amplifier is a FET circuit with a short signal path and a transformer-balanced output, which gives high common-mode rejection. Noted applications include vocals, voice-over, dubbing, audio books, acoustic guitar, drum overheads, bass and guitar cabinets, solo classical instruments and stereo-pair piano recording.
The microphone runs on 48 V phantom power (P48) and connects through a 3-pin XLR. It is offered in nickel or black (mt) finishes, as a microphone with wooden box, as a Studio Set with EA 87 shock mount, or as a Stereo Set with two microphones in an aluminium case.
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Specifications
- Brand
- Neumann
- Model
- U 87 Ai
- Category
- Studio › Microphones
Audio
- 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)
- Equivalent noise level, CCIR
- 26/23/25 dB (Omni/cardioid/8)
- Equivalent noise level, A-weighted
- 15/12/14 dB-A (Omni/cardioid/8)
- 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 SPL for THD 0.5%
- 117 dB (cardioid)
- Maximum SPL for THD 0.5% with preattenuation
- 127 dB
Outputs
- Rated impedance
- 200 ohms
- Rated load impedance
- 1 kohms
- Maximum output voltage
- -6 dBu
Connectivity
- Matching connector
- XLR 3 F
Power
- Supply voltage (P48, IEC 61938)
- 48 V ± 4 V
- Current consumption (P48, IEC 61938)
- 0.8 mA
Physical
- Weight
- 500 g
- Diameter
- 56 mm
- Length
- 200 mm
- Colours
- Nickel (U 87 Ai), black (U 87 Ai mt)
In the box
- U 87 Ai / U 87 Ai mt
- Microphone, wooden box
- Studio Set
- Microphone, EA 87 shock mount, EA 87 Ai wooden box, cardboard package
- Stereo Set
- 2 x microphone, 2 x EA 87 shock mount, 2 x dust cover, aluminium case