Pedals that stack with the Mad Professor Simble Predriver

Ashdown Geezer Butler Signature

Ashdown Geezer Butler Signature's low gain fills in what this transparent tone doesn't make on its own

Origin Effects DCX Boost

Run Origin Effects DCX Boost into that transparent platform and it finally gets some low gain

Walrus Audio Lillian

Walrus Audio Lillian's bright voice goes after Mad Professor Simble Predriver in the signal chain — it's not there to compete with Mad Professor Simble Predriver's own warm character

Pigtronix Philosopher's Tone Micro

What Pigtronix Philosopher's Tone Micro brings here leans toward sustaining — that's worth building a pairing around

Boss DD-200 Digital Delay

Keep Mad Professor Simble Predriver's warm voice out front: Boss DD-200 Digital Delay goes after Mad Professor Simble Predriver in the signal chain so its analog warmth voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Alexander Pedals History Lesson Vol. 2

Run Alexander Pedals History Lesson Vol. 2 after Mad Professor Simble Predriver in the signal chain, clear of Mad Professor Simble Predriver's own gain stage — goes in the amp's FX loop (or last, into a clean amp)