Telefunken AK-47 MKII | R F T Series Multi Pattern Condensor Tube Microphone Type : Condenser Pressure Gradient Capsule : TK47 Dual Sided Gold Sputtered Frequency Range : 20Hz / 20kHz Polar Pattern : Omni, Cardioid, Figure 8 with 6 intermediate stages Sensitivity : 14MV/Pa = -37dB (0dB = 1v/Pa) -10bD Impedance : 200 ohms stock SPL : 125 dB Non Linear Distortion : (for 1% THD @ 1KHz) 132dB Equivalent Noise : 16 dB (a-weighted) Tube Type : EF732 Telefunken NOS