The PFA is a phantom-power adaptor for plug-in power mics, which enables the mics to be connected to standard professional microphone preamplifiers. The PFA supplies the appropriate voltage to the plug-in power microphones, and provides a balanced, low impedance output to the microphone preamplifier.
The left and right channels of the PFA-P operate independently, so phantom power must be supplied to both channels for stereo operation. The PFA requires +18V to +48V phantom power to operate; lower voltages may work with reduced voltage supply to the microphones.
The PFA-P supplies +9V across 7.5KΩ resistors to each microphone channel. For "three-wire" lapel-style mics, the PFA-M is available in a mono configuration, with either a balanced or unbalanced input. The mono PFA-M supplies +9V across a 3.3KΩ resistor, which may be customized to suit various microphones.
PFA Specifications
Type: phantom power adaptor for plug-in power microphone
