Pedals that stack with the Gibson GA-40

Colorsound Power Boost

Run Colorsound Power Boost after it and the warm edge settles into something more bright

RHC Rat Turbo Rat Distortion

RHC Rat Turbo Rat Distortion's bright balances out the warm tone

Electro-Harmonix Triangle Big Muff Pi

Electro-Harmonix Triangle Big Muff Pi leans toward sustaining, and that's a real, usable character to pair with

MXR WA38

MXR WA38's modulated voice goes after Gibson GA-40 in the signal chain — it's not there to compete with Gibson GA-40's own full character

BBE VariComp

BBE VariComp's own compressed character is the real reason this is worth trying

Mooer woodverb

Run Mooer woodverb in Gibson GA-40's effects loop, clear of Gibson GA-40's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

T-Rex Replica Delay

Keep Gibson GA-40's full voice out front: T-Rex Replica Delay goes in Gibson GA-40's effects loop so its pristine voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)