Pedals that stack with the Maxon AF-9 Auto Filter

MXR Distortion+

What MXR Distortion+ brings here leans toward compressed — that's worth building a pairing around

Beetronics Swarm

Beetronics Swarm leans toward fuzzy, and that's a real, usable character to pair with

Roland SDE-3000D

Run Roland SDE-3000D after Maxon AF-9 Auto Filter in the signal chain, clear of Maxon AF-9 Auto Filter's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Walrus Audio Mako D1 High-Fidelity Stereo Delay V1

Run Walrus Audio Mako D1 High-Fidelity Stereo Delay V1 after Maxon AF-9 Auto Filter in the signal chain, clear of Maxon AF-9 Auto Filter's own gain stage — goes in the amp's FX loop (or last, into a clean amp)