Pedals that stack with the Randall RD20-112 Diavlo 20W 1x12 Combo

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

Stack Suhr Shiba Drive on top and a high gain tone tightens toward mid-forward

Goes in front of the amp

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

Feed a high gain signal into Keeley Red Dirt Overdrive and it comes out closer to mid-forward

Goes in front of the amp

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

Stack Beetronics Buzzter Boost Preamp on top and a high gain tone tightens 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. (high gain → shimmer)

Run Electro-Harmonix Deluxe Electric Mistress after Randall RD20-112 Diavlo 20W 1x12 Combo in the signal chain, clear of Randall RD20-112 Diavlo 20W 1x12 Combo'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. (high gain → lush)

Put Hungry Robot Moby Dick V2 in Randall RD20-112 Diavlo 20W 1x12 Combo's effects loop, clear of Randall RD20-112 Diavlo 20W 1x12 Combo'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)

Meris Mercury7 Reverb's ambient voice goes in Randall RD20-112 Diavlo 20W 1x12 Combo's effects loop — it's not there to compete with Randall RD20-112 Diavlo 20W 1x12 Combo's own high gain character — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

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

What Crazy Tube Circuits Golden Ratio brings here leans toward tight — that's worth building a pairing around

Goes in front of the amp