Tube mic power supply

$ 75.00

This product is sold out. We do not intend to restock it. Instead, we recommend our VPS1 premium power supply kit, or the VPS1 premium power supply (which is built to order in our northern California shop).


This is a replacement power supply for the Apex 460 and other popular inexpensive tube microphones.

It is new and unbranded. The front panel contains a 9-position polar pattern switch.

We test the high-voltage line on every unit to ensure proper operation. We provide a 30-day guarantee against failure.

Here are the output voltages for this PSU, as measured with a stock Apex 460 connected:

  • XLR1 (plate voltage, tube pin 6): 135VDC
  • XLR2 (heater voltage, tube pins 4-5): 6.2VDC
  • XLR3 (rear diaphragm polarization): 55-60VDC in Cardioid

Audio input connector: XLR7 (female)

Audio output connector: XLR3 (male)

A recessed switch on the back panel allows the supply to be switched from 115VAC to 230VAC.

This PSU includes a US power cord.


We guarantee this PSU to be compatible with the Alctron T11-A and its clones, including the Apex 460, Apex 460B, Carvin CTM-100. It is also compatible with our own 12-251, V-47, and V12 microphones.

It is known to not be compatible with Rode tube microphones, which have a different pinout and different voltage requirements.

Color Options

We offer two colors for the power supply cover: matte black, or satin silver titanium. The latter is a durable powdercoat; these silver covers have been heat-treated for longevity. The silver units are sold at our cost of $10 additional per unit. The supply of these parts is limited.