Pedals that stack with the Dunlop JH-3S Jimi Hendrix Signature System Octave

Cordovox FL-8

Run Cordovox FL-8 after Dunlop JH-3S Jimi Hendrix Signature System Octave in the signal chain, clear of Dunlop JH-3S Jimi Hendrix Signature System Octave's own gain stage

Z.Vex Super Hard On

Z.Vex Super Hard On layers clean boost onto an already fuzzy signal

Aguilar Octamizer (Bass Octaver)

Aguilar Octamizer (Bass Octaver) stacks octave on top of the fuzzy already here

Strymon OB.1 Bass

Strymon OB.1 Bass leans toward clean boost, and that's a real, usable character to pair with

Pigtronix Echolution

Pigtronix Echolution's modulated voice goes after Dunlop JH-3S Jimi Hendrix Signature System Octave in the signal chain — it's not there to compete with Dunlop JH-3S Jimi Hendrix Signature System Octave's own octave character — goes in the amp's FX loop (or last, into a clean amp)

Walrus Audio Melee Wall of Noise Black

Keep Dunlop JH-3S Jimi Hendrix Signature System Octave's octave voice out front: Walrus Audio Melee Wall of Noise Black goes after Dunlop JH-3S Jimi Hendrix Signature System Octave in the signal chain so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)