Whirlwind SP1X3 Mic Splitter
The Whirlwind SP1X3 mic splitter sends one microphone to three destinations, through one direct output and two transformer-isolated outputs.
The direct output is a straight-through connection that passes phantom power, so a condenser mic draws its power from the mixer or recorder on that output. Each isolated output feeds a balanced 150-ohm signal through a Whirlwind TRSP transformer and does not pass phantom power. Each also has a GND/LIFT switch that disconnects the ground between the input and that output, while the direct output always keeps its ground connected. For line-level sources, Whirlwind makes the SP1X3LL.
Features
- One mic-level input, three outputs
- Direct output passes phantom power
- Two transformer-isolated outputs through Whirlwind TRSP transformers
- Separate ground lift switch on each isolated output
- Female XLR input and male XLR outputs
About Whirlwind
Whirlwind began in 1975 and is based in Rochester, New York. They build audio interface gear in the USA, from direct boxes, splitters, and testers to snakes and power distribution. Each cable is built by hand, one at a time, and their own metal shop punches and engraves custom panels.




