Pedals that stack with the Gallien-Krueger GK Fusion 112 Bass Combo

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (warm → bright)

Where this leans warm, Ashdown Geezer Butler Signature answers back bright

Goes in front of the amp

clean platform takes the driveA clean, high-headroom stage takes on dirt it can't generate by itself. (high headroom → mid-forward)

The high headroom tone has headroom to spare — Univox Super-Fuzz leans it toward mid-forward to fill it in

Goes in front of the amp

clean platform takes the driveA clean, high-headroom stage takes on dirt it can't generate by itself. (high headroom → fuzzy)

The high headroom tone has headroom to spare — Beetronics Swarm leans it toward fuzzy to fill it in

Goes in front of the amp

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Keep Maestro PS-1A Phase Shifter after Gallien-Krueger GK Fusion 112 Bass Combo in the signal chain, clear of Gallien-Krueger GK Fusion 112 Bass Combo's own gain stage

Goes in front of the amp

shapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain. (high headroom → compressed)

What Boss BC-1X brings here leans toward compressed — that's worth building a pairing around

Goes in front of the amp

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Put Strymon El Capistan in Gallien-Krueger GK Fusion 112 Bass Combo's effects loop, clear of Gallien-Krueger GK Fusion 112 Bass Combo's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Boss DD-200 Digital Delay's shimmer voice goes in Gallien-Krueger GK Fusion 112 Bass Combo's effects loop — it's not there to compete with Gallien-Krueger GK Fusion 112 Bass Combo's own tight character — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop