Ashdown Pro-FX Sub Harmonic Generator Bass Effect Pedal | Bax Music
MXR Sub Octave Bass Fuzz Pedal Demo - YouTube
TC Electronic SUB "N" UP Octaver | Bass Centre
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
MXR Sub Octave Bass Fuzz - YouTube
MXR M 287 Sub Octave Bass Fuzz – Thomann España
MXR SUB OCTAVE BASS FUZZ M287 - Ardemadrid-microFusa