The PS1 aluminium tube microphone power supply not only provides filament and plate voltage for vacuum tube (Valve) dual diaphragm condenser microphone, but also remotely controls its continuously variable polar pattern. Adjusting the polar pattern will change the sound style. Generally, the omnidirectional pattern offers the airiest top-end and minimum proximity effect. The figure-8 pattern offers the smoothest top-end and maximum proximity effect. Adjusting the polar pattern from omnidirectional to cardioid to figure-8 can allow the sound style to be fine tuned to suit a specific vocalist or instrument.

7-pin XLR connector pinout

pin1 - Plate voltage 200V

pin2 - Filament voltage 6.3V

pin3 - 0 to 120V remotely control microphone continuously variable polar pattern

pin4 - COM connected to the pin7 inside the microphone

pin5 - OUT-

pin6 - OUT+

pin7 - Shield/GND