Pedals that stack with the Marshall 2203KK Kerry King JCM800

Greer Mizuki blue

Run Greer Mizuki blue after it and the bright edge settles into something more warm

Xotic BB Preamp

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

EarthQuaker Devices White Light

EarthQuaker Devices White Light's warm balances out the bright tone

Universal Audio Golden Reverberator

Keep Marshall 2203KK Kerry King JCM800's crunchy voice out front: Universal Audio Golden Reverberator goes in Marshall 2203KK Kerry King JCM800's effects loop so its spring voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Meris LVX Delay

Keep Marshall 2203KK Kerry King JCM800's crunchy voice out front: Meris LVX Delay goes in Marshall 2203KK Kerry King JCM800's effects loop so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Origin Effects MAGMA57 Amp Vibrato & Drive

Run Origin Effects MAGMA57 Amp Vibrato & Drive after Marshall 2203KK Kerry King JCM800 in the signal chain, clear of Marshall 2203KK Kerry King JCM800's own gain stage

BBE OptiComp

BBE OptiComp leans toward dynamic, and that's a real, usable character to pair with