Pedals that stack with the Carl Martin Hot Drive 'N Boost mkI

Keeley Red Dirt Overdrive

Feed a high gain signal into Keeley Red Dirt Overdrive and it comes out closer to mid-forward

Fulltone OCD

What Fulltone OCD brings here leans toward full — that's worth building a pairing around

Electro-Harmonix Electric Mistress

Keep Electro-Harmonix Electric Mistress after Carl Martin Hot Drive 'N Boost mkI in the signal chain, clear of Carl Martin Hot Drive 'N Boost mkI's own gain stage

Warm Audio Pedal 76 Compressor

What Warm Audio Pedal 76 Compressor brings here leans toward tight — that's worth building a pairing around

Mooer A7 Ambience

Mooer A7 Ambience's pristine voice goes after Carl Martin Hot Drive 'N Boost mkI in the signal chain — it's not there to compete with Carl Martin Hot Drive 'N Boost mkI's own clean boost character — goes in the amp's FX loop (or last, into a clean amp)

Walrus Audio Fathom

Keep Carl Martin Hot Drive 'N Boost mkI's clean boost voice out front: Walrus Audio Fathom goes after Carl Martin Hot Drive 'N Boost mkI in the signal chain so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)