Shure BETA 87A دليل المستخدم

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Model Beta 87A Condenser Microhpone
Specification Sheet
BETA 87A
SUPERCARDIOID CONDENSER MICROPHONE
OVERVIEW
The Shure Model BETA 87A is a premium quality supercar- that compensates for proximity effect and prevents the “boomy”
dioid hand-held electret condenser vocal microphone with ex- sound often associated with close pick-up. The characteristic
ceptionally smooth frequency response and high sound pres- Shure presence rise brightens the upper midrange. The tight su-
sure level (SPL) capabilit

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MODEL BETA 87A CONDENSER MICROPHONE Specification Sheet Output Impedance Signal-to-Noise Ratio Rated at 150 ohms (100 ohms actual ±20%) 70.5 dB at 94 dB SPL (IEC 651)* Recommended minimum load impedance: 800 ohms Polarity Sensitivity (at 1,000 Hz) Positive pressure on diaphragm produces positive voltage on pin Open Circuit Voltage . . . . . . . . . . . . . . . . . –52.5 dBV/Pa (2 mV) 2 relative to pin 3 (1 Pa = 94 dB SPL) Power Clipping Level (at 1,000 Hz) Phantom Supply Requirement . . . . . .