SHURE
SM87A Vocal Microphone Performance Microphones

Highly directional supercardioid pickup pattern

Controlled low-frequency roll-off

Very low RF and magnetic hum susceptibility

Minimally affected by varying load impedance

Built-in wind and pop filter

Transducer element shock mounted

Rugged construction for outstanding reliability

Field-usable over a wide range of temperature and humidity conditions

Accepts wide variety of phantom power sources, including DIN 45 596 voltages of 11 and 52 Vdc

Cartridge Type : Condenser (electret bias)

Polar Pattern :Supercardioid

Output Impedance :Rated at 150 ohms (100 ohms actual +/- 20%). Recommended minimum load impedance: 800 ohms.

Sensitivity (at 1,000 Hz) Open Circuit Voltage: -52.5 dBV/Pa (2.4 mV)
(1 Pa = 94 dB SPL)

Clipping level( at 1000Hz) :1000 ohm Load: -6 dBV (0.5 V)

Maximum SPL (at 1,000 Hz) : 140.5 dB (0.25% THD, 1000 ohm load)

Self-Noise (equivalent sound pressure level; measured with true rms voltmeter)
24 dB typical, A-weighted
26 dB typical, weighted per DIN 45 405

Dynamic Range : 116.5 dB (maximum SPL to A-weighted noise level)

Signal-to-Noise Ratio
70 dB at 94 dB SPL (IEC 651)*
*S/N ratio is difference between 94 dB SPL and product's equivalent self noise (SPL A-weighted).

Polarity :Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3.

Power :Phantom Supply Requirement: 11 to 52 Vdc, positive at both pins 2 and 3.
Current Drain: 1.0 to 1.2 mA

Connector :Three-pin (XLR) professional audio.

Case :Aluminum construction with steel grille and satin black finish.

Dimensions :See User Guide.

Net Weight :200 grams (7 oz)