Updated Fulltone Ultimate Octave Schematic

: One switch engages the main fuzz effect, while the second independently activates the

The is a boutique fuzz and octave-up pedal that has become a staple for players seeking aggressive, harmonically rich textures. It is widely recognized as a highly refined version of the classic fOXX Tone Machine circuit from the 1970s. Circuit Overview & Schematic Design fulltone ultimate octave schematic