Pedals that stack with the Carl Martin Heavy Drive

Xotic EP Booster

Stack Xotic EP Booster on top and a high gain tone tightens toward clean boost

Boss BD-2 Blues Driver

Stack Boss BD-2 Blues Driver on top and a high gain tone tightens toward clean boost

Electro-Harmonix Deluxe Electric Mistress

Keep Electro-Harmonix Deluxe Electric Mistress after Carl Martin Heavy Drive in the signal chain, clear of Carl Martin Heavy Drive's own gain stage

Crazy Tube Circuits Golden Ratio

Crazy Tube Circuits Golden Ratio's own tight character is the real reason this is worth trying

Hungry Robot The Borderland

Keep Hungry Robot The Borderland after Carl Martin Heavy Drive in the signal chain, clear of Carl Martin Heavy Drive's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Hungry Robot Moby Dick V2

Hungry Robot Moby Dick V2's ambient voice goes after Carl Martin Heavy Drive in the signal chain — it's not there to compete with Carl Martin Heavy Drive's own high gain character — goes in the amp's FX loop (or last, into a clean amp)