Shure SM87A Supercardioid Condenser Microphone

→ Type: Condenser
→ Frequency Response: 50 to 20,000 Hz
→ Polar Pattern: Supercardioid
→ Sensitivity (at 1,000 Hz): Open Circuit Voltage: –52.5 dBV/Pa (2.4 mV) (1 Pa = 94 dB SPL)
→ Impedance: Rated at 150 ohms (100 ohms actual ±20%); Recommended minimum load impedance: 800 ohms
→ Output Clipping Level: 1000 Ohm Load at 1,000 Hz: –6 dBV (0.5 V)
→ Maximum SPL (at 1,000 Hz): 140.5 dB (0.25% THD, 1000 ohm load)
→ Self-Noise: 24 dB typical, A-weighted; 26 dB typical, weighted per DIN 45 405
→ Dynamic Range (1000 ohms): 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 equivalent SPL of self– noise A-weighted
→ Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3
→ Power Requirements: 11 to 52 vdc, 1.2 mA
→ Case: Aluminum construction with steel grille and satin black finish
→ Connector: Three-pin professional audio connector (male XLR type)
→ Net Weight: 200 grams (7 oz)
→ Dimensions: 192 mm (7-9/16 in.) L x 50 mm (2 in.) W at the widest point
→ 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 a wide variety of phantom power sources, including DIN 45 596 voltages of 11 and 52 Vdc