From Vertex:

The Ultraphonix Overdrive is designed to re-create the overdrive produced by a Dumble Overdrive Special amplifier. Using a sample size of four generations of Overdrive Special amplifiers from 1970-1990 to voice and calibrate the pedal, the Ultraphonix is more than able to provide the D*style overdrive to any clean amp platform.

  • Voiced alongside four Dumble ODS amps ranging from 1970’s-1990’s
  • Quintessential D*style tone, note bloom, & harmonic overtones
  • 100% Analog Circuitry
  • Mechanical “True Bypass” Switching
  • Designed & Assembled in California
  • 9VDC center-negative power operation (adapter not included)

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