Product details of Shure SH680 Dynamic wired microphone with an on / off switch Technical specifications Type – Dynamic Frequency Response – 50 to 15,000 Hz Polar Pattern – Cardioid Sensitivity (at 1,000 Hz Open circuit voltage) –54.5 dBV/Pa (1.85 mV) 1 Pa = 94 dB SPL Impedance Rated impedance is 150 Ω (300 Ω […]