Shure SM87A Supercardioid Condenser Vocal Microphone

A sensitive condenser vocal microphone that features a smooth, tailored response for a warm, accurate sound.


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The Shure SM87A microphone is a professional-quality, handheld condenser microphone for use in sound reinforcement, broadcasting, and studio recording installations. Its supercardioid polar pattern provides greater rejection of unwanted sound sources, making it ideal for miking individual instruments in a multi-microphone setting or for miking single sources in a reverberant or noisy environment. An integral three-stage wind and pop filter protects against wind and breath noise. Its built-in shock mount reduces stand and handling noise.

 • 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

 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).
 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
 Net Weight: 200 grams (7 oz)


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