Pedals that stack with the Peavey Rock Master Preamp

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

Feed a high gain signal into Soldano SLO and it comes out closer to tight

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

Suhr Shiba Drive pushes a high gain tone toward mid-forward

Comes earlier in the signal chain

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)

Keep Electro-Harmonix Deluxe Electric Mistress after Peavey Rock Master Preamp in the signal chain, clear of Peavey Rock Master Preamp's own gain stage

Comes earlier in the signal chain

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 TC Electronic Triple Flashback Delay after Peavey Rock Master Preamp in the signal chain, clear of Peavey Rock Master Preamp's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

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)

Run Meris Mercury7 Reverb after Peavey Rock Master Preamp in the signal chain, clear of Peavey Rock Master Preamp's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

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

Peavey Rock Master Preamp's own high gain character is the real reason this is worth trying

Comes earlier in the signal chain