Shure Microphone, Shure  SM87A Handheld Condenser XLR,  A favorite choice of the world's top entertainers, the SM87A condenser microphone features a smooth frequency response that's specifically tailored for warm, rich, vocal reproduction.

Features.

• Tight polar pattern for high gain-before-feedback and rejection of unwanted sounds
• Effective three-point shock mount minimizes stand and handling noise
• Phantom power operation
• Supercardioid condenser
• Supplied with break-resistant swivel adapter

Specification.

• 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  26dB typical, weighted per DIN 45 4052
• Dynamic Range: 116.5 dB (maximum SPL to A-weighted noise level)
• Signal-to-Noise Ratio: 70 dB at 94 dB SPL (IEC 651)*
• 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)