Vocal microphone Mixer controlled Type: Dynamic Frequency Response: 50 to 15,000 Hz Polar Pattern: Cardioid Sensitivity (at 1,000 Hz Open Circuit Voltages): –54.5 dBV/Pa (1.85 mV) 1 Pa = 94 dB SPL Impedance: Rated impedance is 300Hz (600ohm actual) for connection to microphone inputs rated low impedance Polarity: Positive pressure on diaphragm produces positive voltage on pin 2.