Pedals that stack with the Marshall 1987X MK II Reissue 2-Channel 50-Watt

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)

Xotic BB Preamp leans smooth right where the bright tone needs it

Goes in front of the amp

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

Catalinbread Dirty Little Secret Mk2 leans toward harmonically rich, and that's a real, usable character to pair with

Goes in front of the amp

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

Catalinbread Dirty Little Secret MKI leans toward dynamic, 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.

Run Origin Effects MAGMA57 Amp Vibrato & Drive after Marshall 1987X MK II Reissue 2-Channel 50-Watt in the signal chain, clear of Marshall 1987X MK II Reissue 2-Channel 50-Watt's own gain stage

Goes in front of the amp

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

Valco Under Pressure Classic Compressor's own compressed character is the real reason this is worth trying

Goes in front of the amp

Put Catalinbread Dirty Little Secret Deluxe in Marshall 1987X MK II Reissue 2-Channel 50-Watt's effects loop, clear of Marshall 1987X MK II Reissue 2-Channel 50-Watt'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 1987X MK II Reissue 2-Channel 50-Watt's crunchy voice out front: Caroline Guitar Company Kilobyte goes in Marshall 1987X MK II Reissue 2-Channel 50-Watt'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