DISC Electro Harmonix Octave Multiplexer Analog Sub-Octave Generator | Gear4music
PEDAL DE EFECTO (OTROS) DIGITECH MEATBOX
Pedal Dunlop MXR M-80Y Bass Distortion+ Special Edition
MXR SUB OCTAVE BASS FUZZ M287 - Ardemadrid-microFusa
Ashdown Pro-FX Sub Harmonic Generator Bass Effect Pedal | Bax Music
Guitar Pedal X - GPX Blog - October Audio releases the really cool F Division Sub Octave Drive - a sort of Monophonic Bass Fuzz Synth with 3 selectable Sub Octaves