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Fusion Preamp Interface


Connect and control rotary speakers

The Fusion Preamp Interface is a versatile interface tool for connecting – and controlling – rotary speakers.

SKU: FPI Category:


The Fusion Preamp Interface, designed for connecting and controlling Leslie® speaker cabinets, enables simultaneous operation and safe speed switching. The built-in preamp provides 26db of clean gain volume, treble and bass controls while the 11-pin connector provides the signals and speed control from the organ.

In addition to the 11-pin connector, Fusion features a 1/4″ front panel input for guitars as well as other keyboards or electronic instruments. A low cut switch is useful for acoustic guitars, too. The gain select switch allows you to vary low or high gain to suit your application.

The 147 output connects to a Leslie 147 or 145 style rotary speaker and the 122 output connects to a Leslie 122 or 142 style speaker.

For speed control, a CU-1 half moon switch , or a compatible footswitch can be utilized. A terminal block input allows for hard-wiring the speed switch. Individual selection of normal or EIS/TrekII mode for the 122 and 147 amplifiers is also possible.


  • In-line enhancement for a combo organ or clone-wheel organs
  • Provides Fast/Slow/Stop and simultaneous Leslie 122/147 operation
  • Safe low voltage DC speed switching for 122 and 147
  • Built-in preamp
  • 11 pin Input and Output options

Additional information

Weight N/A
Dimensions N/A

FPI-D, FPI-D-EFX, FPI-D11/11, FPI-D11/11-EFX


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