Single Channel Passive Microphone Splitter

The PMS13a is a professional quality stand alone microphone splitter. The applications include public speeches, live recording, press conferences and musicians’ monitoring.

The input circuit is used an isolation transformer for long microphone lines feeding and a polarity reversing switch to change the microphone phase cancellation. The transformer isolation in such situations minimizes interference from SCR lighting dimmers, radio transmitters and AC power wiring. The transformer-isolated feeds retain the advantage of common-mode noise rejection inherent in the use of balanced lines.

The splitter has three outputs - one is direct and two are transformer coupled. The outputs can be also used as connected Phantom Power for microphone. Two-way Ground Lift switches are fitted to help combat ground loops. Left side is capacitor linked to ground while right side offers full grounding chassis connection. There are two switches for A and B outputs*. They can be routed the Phantom Power from each mixer to microphone individually.

The PMS13a professional quality microphone splitter is designed for use in applications where exceptional audio performance is required.



  • Broadcast quality.
  • Compact design.
  • Three-way split.
  • Phantom power connected in all outputs.
  • Transformer isolated output.
  • Ground lift options.
  • Switchable phase.
  • Die-cast case made.
  • Use of military grade components.



  Frequency Response 20Hz~20kHz ±0.2dB
  Maximum Input Level +16dBu, (1% 50Hz)
    +24dBu, (0.1% 1kHz)
  Distortion 0.003% (0dBu at 1kHz)
  Insertion Loss -4.5dB into 600Ω Load
    0.9dB into 50kΩ Load
  Shorted Input Loss A or B -2dBu (Meansured From Input Port)
  Connections XLR Female Input,
    XLR Male Direct Output,
    XLR Male Isolated Output × 2,
    Ground Lift Switch × 2,
    Phantom Switch × 2,
    Phase Change Switch × 2
  Dimensions W41 × H85 × D108 (mm)
  Nett Weight 0.37kg