... microphone,dynamic wired microphone,wireless wired microphone,professional dynamic wired microphone 50 to 15,000 Hz frequency response Unidirectional pickup pattern (cardioid), rotationally symmetric axis of the microphone ... dB SPL Rated impedance connected to the lower impedance microphone input, rated impedance of 150 ohms (300 ohms) ... , silver, spherical steel mesh cover Wire microphone (SM-58)