Pedals that stack with the Electro-Harmonix Bass Big Muff Pi

Z.Vex Super Hard On

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

Zvex Seek Trem

Put Zvex Seek Trem after Electro-Harmonix Bass Big Muff Pi in the signal chain, clear of Electro-Harmonix Bass Big Muff Pi's own gain stage

Walrus Audio Ages

Put Walrus Audio Ages in front and the fuzzy tone leans further toward clean boost

Strymon OB.1 Bass

What Strymon OB.1 Bass brings here leans toward clean boost — that's worth building a pairing around

Cusack Music Delay TME

Keep Electro-Harmonix Bass Big Muff Pi's fuzzy voice out front: Cusack Music Delay TME goes after Electro-Harmonix Bass Big Muff Pi in the signal chain so its tight voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Walrus Audio Mako D1 High-Fidelity Stereo Delay V1

Walrus Audio Mako D1 High-Fidelity Stereo Delay V1's pristine voice goes after Electro-Harmonix Bass Big Muff Pi in the signal chain — it's not there to compete with Electro-Harmonix Bass Big Muff Pi's own fuzzy character — goes in the amp's FX loop (or last, into a clean amp)