Neumann U87AI-BLACK
Multipattern U87 Large Dual-Diaphragm Condenser Microphone (with Wood Case, NO Mount)

U87AI-BLACK

NOTE: Does NOT come with mount.

Neumann's U87 mic is known for its warm sound and well-balanced characteristics.  The newer "AI" version yields a 6dB improvement in signal to noise ratio.  The U87AI-BLACK is equipped with a large dual-diaphragm capsule with 3 polar patterns: omni, cardioid and figure-8. (These are selectable with a switch below the headgrille.)  A 10dB pad switch located on the rear of the mic enables the microphone to handle sound pressure levels up to 127 dB without distortion.  A low cut filter switch is also featured.  48 volt phantom power is required.

Additional Features:

• Comes with wooden case
• Pressure-gradient transducer with double membrane capsule
• Unique frequency and transient response characteristic
• Good choice for most general purpose applications in studios, for broadcasting, film and television
• Can also be used as a main microphone for orchestra recordings, a spot mic for single instruments, and as a music/speech vocal microphone.
• Addressed from the front
• The frequency response of the cardioid and figure-8 directional characteristics are very flat for frontal sound incidence, even in the upper frequency range.  In using the high-pass filter, interferences through subsonic and low frequencies are reduced remarkably.
• The elastically mounted dual-diaphragm capsule is protected by a large headgrille.
• The present-day circuitry increases the mic's operational headroom by supplying the bias voltages for the capsule through a reduced resistance.  The result is a higher sensitivity of 10 dB for identical sound pressure levels, and an improved S/N ratio of 3 dB.

Filter and attenuation:

A switch located at the rear attenuates the sensitivity by 10 dB.  When this switch is activated, the microphone accepts sound pressure levels up to 127 dB (equivalent to a sound pressure of 45 Pa) without distortion.

An additional switch at the rear allows to change the microphone's cutoff frequency.  This reduces low frequency interference directly at the input of the microphone amplifier.

This setting also compensates for the unavoidable bass boost that occurs with all pressure gradient transducers when they are used at close distance (proximity effect).

The cardioid characteristic maintains a smooth frequency response at a distance of 30 to 40 cm, the figure-8 characteristic even at a distance of 15 to 20 cm.

Specifications:

• Frequency range: 20 Hz-20 kHz
• Sensitivity at 1 kHz into 1 kohm:
  - Omnidirectional: 20 mV/Pa
  - Cardioid: 28 mV/Pa
  - Figure-8: 22 mV/Pa
• Rated impedance: 200 ohms
• Rated load impedance: 1 kOhms
• Equivalent noise level, CCIR*:
  - Omnidirectional: 26 dB
  - Cardioid: 23 dB
  - Figure-8: 25 dB
  *According to IEC 60268-1; CCIR-weighting according to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
• Equivalent noise level, A-weighted*:
  - Omnidirectional: 15 dB-A
  - Cardioid: 12 dB-A
  - Figure-8: 14 dB-A
  *According to IEC 60268-1; CCIR-weighting according to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
• Signal-to-noise ratio, CCIR* (rel. 94 dB SPL):
  - Omnidirectional: 68 dB
  - Cardioid: 71 dB
  - Figure-8: 69 dB
  *According to IEC 60268-1; CCIR-weighting according to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
• Signal-to-noise ratio, A-weighted* (rel. 94 dB SPL):
  - Omnidirectional: 79 dB
  - Cardioid: 82 dB
  - Figure-8: 80 dB
  *According to IEC 60268-1; CCIR-weighting according to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
• Maximum SPL for THD 0.5%: 117 dB (cardioid)
  **Measured as equivalent el. input signal
• Maximum SPL for THD 0.5% with preattenuation**: 127 dB
  **Measured as equivalent el. input signal
• 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: 3-pin XLR-F
• Weight: 500 g
• Diameter: 56 mm
• Length: 200 mm

Our Part #  U87AI-BLACK