Operation

Principle of the RF circuit

In contrast to the high impedance of the capsules in conventional “DC biased” condenser microphones, the capsule of an RF condenser microphone has a low impedance. The high polarization voltages normally required in condenser microphones are not necessary in the RF condenser microphone. RF condenser microphones use a comparatively low RF bias voltage of less than 10 V, generated by a built-in low-noise oscillator (8 MHz). The RF principle ensures increased operational reliability, particularly for outdoor recordings under extreme climatic conditions.