Pedals that stack with the Friedman Plex Head with 4x12 Cabinet

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)

Run Xotic BB Preamp after it and the bright edge settles into something more smooth

Goes in front of the amp

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

Wampler Plexi Drive is voiced for Marshall-style amps — Friedman Plex Head with 4x12 Cabinet gives it exactly that

Goes in front of the amp

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

Analog Man King of Tone pushes a high gain tone 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.

Put Strymon Zelzah -Dimensional Phaser after Friedman Plex Head with 4x12 Cabinet in the signal chain, clear of Friedman Plex Head with 4x12 Cabinet's own gain stage

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 Suhr Discovery in Friedman Plex Head with 4x12 Cabinet's effects loop, clear of Friedman Plex Head with 4x12 Cabinet's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

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)

Put NuX Damp Reverb in Friedman Plex Head with 4x12 Cabinet's effects loop, clear of Friedman Plex Head with 4x12 Cabinet's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)

Pigtronix Gloamer's own dynamic character is the real reason this is worth trying

Goes in front of the amp