Shure SM87A
Cartridge Type
Condenser (electret bias)
Frequency Response
50 to 20,000 Hz
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 1,000 Hz)
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).
*S/N ratio is difference between 94 dB SPL and product's equivalent self noise (SPL A-
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
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)
Janssen Sound & Light vof
Tel +31(0)481 - 425.335 Fax +31(0)481 - 424.176
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