Fender Rhodes Piano Preamp


Since 1990 we have tested many different pre amps, modifications, “Dyno” circuits and other hybrids and found that the original Mark I topology (Circa 1970-1976) is the most desirable preamp for Rhodes pianos. In these years, the Fender Rhodes pre amps used mini lamps to create the famous “soft vibrato” effect.

We re-created the exact lamp filament effect with modern components and added custom active EQ circuitry based on rare EQ topology that was circulating around Los Angeles in the 70’s – 80’s.

The Pre amp is handcrafted in our workshop and custom built to order. The preamp is offered by application only. Each unit is considered a prototype. The external look of the unit changes as we test different boxes, power supplies and knobs. Price fluctuate accordingly.

Uncompressed Audio

Preamp Direct Out Audio Tests .wav 44.1 (1973 Stage Piano)


  • Mono 1/4″ input
  • Two 1/4″ outputs
  • Effects loop Send/Return
  • Bass/Treble Control
  • Stereo Vibrato with Speed and Depth Control
  • Stereo CLASS-A Single Ended Output Driver
  • External Power Supply
  • 100% Solid State

Signal Path Diagram

Custom Rhodes Preamp Signal Path Diagram