Pedals that stack with the Gallien-Krueger GK Fusion 2x12 Bass Combo Amp

Carl Martin Crunch Drive

The high headroom tone has headroom to spare — Carl Martin Crunch Drive gives it crunchy to fill it with

Ashdown Geezer Butler Signature

The high headroom tone has headroom to spare — Ashdown Geezer Butler Signature gives it low gain to fill it with

Carl Martin PlexiTone

The high headroom tone has headroom to spare — Carl Martin PlexiTone gives it high gain to fill it with

Outlaw Effects RockerBox

Keep Gallien-Krueger GK Fusion 2x12 Bass Combo Amp's high headroom voice out front: Outlaw Effects RockerBox goes after Gallien-Krueger GK Fusion 2x12 Bass Combo Amp in the signal chain so its crunchy voice doesn't muddy it

Lab Ratz 3D Boum Warming Unit

Lab Ratz 3D Boum Warming Unit leans toward low gain, and that's a real, usable character to pair with

Binson Echorec Delay

Keep Gallien-Krueger GK Fusion 2x12 Bass Combo Amp's high headroom voice out front: Binson Echorec Delay goes in Gallien-Krueger GK Fusion 2x12 Bass Combo Amp's effects loop so its saturated voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Strymon El Capistan dTape Echo

Put Strymon El Capistan dTape Echo in Gallien-Krueger GK Fusion 2x12 Bass Combo Amp's effects loop, clear of Gallien-Krueger GK Fusion 2x12 Bass Combo Amp's own gain stage — goes in the amp's FX loop (or last, into a clean amp)