Pedals that stack with the Citadel Particle Drive preamp

pushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (high gain → mid-forward)

Stack Suhr Shiba Drive on top and a high gain tone tightens toward mid-forward

Comes earlier in the signal chain

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (high gain → shimmer)

Put Electro-Harmonix Deluxe Electric Mistress after Citadel Particle Drive preamp in the signal chain, clear of Citadel Particle Drive preamp's own gain stage

Comes earlier in the signal chain

pushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (high gain → mid-forward)

Browne Amplification Gritador takes that high gain character and pushes it toward mid-forward

Comes earlier in the signal chain

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (high gain → lush)

Keep Citadel Particle Drive preamp's high gain voice out front: Hungry Robot Moby Dick V2 goes after Citadel Particle Drive preamp 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)

Comes later in the signal chain

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (high gain → modulated)

Run Hungry Robot The Borderland after Citadel Particle Drive preamp in the signal chain, clear of Citadel Particle Drive preamp's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

shapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain.

What Crazy Tube Circuits Golden Ratio brings here leans toward tight — that's worth building a pairing around

Comes earlier in the signal chain