Pedals that stack with the Marshall JCM800 Purple Ltd

gain stackingStacks two gain stages for more saturation than either produces alone. (mid-forward → fuzzy)

Colorsound Overdriver stacks fuzzy on top of the mid-forward already here

Goes in front of the amp

pushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (crunchy → clean boost)

Stack Xotic BB Preamp on top and a crunchy tone tightens toward clean boost

Goes in front of the amp

pushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (crunchy → clean boost)

Analog Man King of Tone takes that crunchy character and pushes it toward clean boost

Goes in front of the amp

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Run Origin Effects MAGMA57 Amp Vibrato & Drive after Marshall JCM800 Purple Ltd in the signal chain, clear of Marshall JCM800 Purple Ltd's own gain stage

Goes in front of the amp

Catalinbread Dirty Little Secret Deluxe's full voice goes in Marshall JCM800 Purple Ltd's effects loop — it's not there to compete with Marshall JCM800 Purple Ltd's own mid-forward character — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

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

Keeley Bassist leans toward compressed, and that's a real, usable character to pair with

Goes in front of the amp

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Keep Marshall JCM800 Purple Ltd's mid-forward voice out front: Caroline Guitar Company Kilobyte goes in Marshall JCM800 Purple Ltd's effects loop so its pristine voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop