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Radial Engineering


Radial Firefly Tube DI, 2-inputs, class-A,12AX7 tube drive, transformer isolated output


The Radial Firefly is a high output tube direct box designed for stage and studio. It combines Radial's award winning zero negative feedback class-A front end with the warmth and character of a 12AX7 tube drive circuit and Radial's legendary transformer coupled output.

  • Class-A front end drives 12AX7 tube stage 
  • Two inputs with separate gain & remote switching 
  • Drag Control load correction for optimal tone 
  • Variable high-pass filter to eliminate resonance