Pedals that stack with the Blackstar HTV40MK3 40 Watt

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

Greer Southland takes that crunchy character and pushes it toward clean boost

Goes in front of the amp

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)

Where this leans bright, Xotic BB Preamp answers back smooth

Goes in front of the amp

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

Stack Boss BD-2 Blues Driver on top and a crunchy 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.

Keep Strymon Zelzah -Dimensional Phaser after Blackstar HTV40MK3 40 Watt in the signal chain, clear of Blackstar HTV40MK3 40 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.

Maxon CP-9Pro+ leans toward compressed, 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.

Keep Blackstar HTV40MK3 40 Watt's crunchy voice out front: Strymon TimeLine goes in Blackstar HTV40MK3 40 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

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 Alexander Pedals Amnesia Delay in Blackstar HTV40MK3 40 Watt's effects loop, clear of Blackstar HTV40MK3 40 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