Pedals that stack with the Marshall DSL100H

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)

What Wampler Plexi Drive brings here leans toward crunchy — that's worth building a pairing around

Goes in front of the amp

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

Catalinbread Dirty Little Secret Mk2's own harmonically rich character is the real reason this is worth trying

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 Marshall DSL100H in the signal chain, clear of Marshall DSL100H'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.

Put Suhr Discovery in Marshall DSL100H's effects loop, clear of Marshall DSL100H'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.

Keep Marshall DSL100H's high gain voice out front: MXR Analog Delay goes in Marshall DSL100H's effects loop so its warm 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

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)

Whirlwind Rochester Red Box's own smooth character is the real reason this is worth trying

Goes in front of the amp