Pedals that stack with the Marshall JCM800 2203ZW

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 Hoof

EarthQuaker Devices Hoof's warm balances out the bright tone

Wampler Latitude Deluxe Tremolo

Run Wampler Latitude Deluxe Tremolo after Marshall JCM800 2203ZW in the signal chain, clear of Marshall JCM800 2203ZW's own gain stage

BBE OptiComp

What BBE OptiComp brings here leans toward dynamic — that's worth building a pairing around

MXR Analog Delay

Put MXR Analog Delay in Marshall JCM800 2203ZW's effects loop, clear of Marshall JCM800 2203ZW's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Universal Audio Golden Reverberator

Universal Audio Golden Reverberator's spring voice goes in Marshall JCM800 2203ZW's effects loop — it's not there to compete with Marshall JCM800 2203ZW's own crunchy character — goes in the amp's FX loop (or last, into a clean amp)