Pedals that stack with the Blackstar ID:Core Stereo 40 V4

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)

Feed a high gain signal into Fjord Fuzz Fjaer Spring Reverb and it comes out closer to lush

Goes in front of the amp

gain stackingStacks two gain stages for more saturation than either produces alone. (low gain → fuzzy)

The low gain tone has headroom to spare — Sola Sound Tone Bender MkII leans it toward fuzzy to fill it in

Goes in front of the amp

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

Greer Tomahawk takes that high gain character and pushes it toward tight

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 → modulated)

Keep Blackstar ID:Core Stereo 40 V4's high gain voice out front: JHS Emperor goes after Blackstar ID:Core Stereo 40 V4 in the signal chain so its modulated voice doesn't muddy it

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 → ambient)

Keep Mooer EchoVerb in Blackstar ID:Core Stereo 40 V4's effects loop, clear of Blackstar ID:Core Stereo 40 V4'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)

Keep Blackstar ID:Core Stereo 40 V4's high gain voice out front: Meris Mercury7 Reverb goes in Blackstar ID:Core Stereo 40 V4's effects loop so its ambient 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

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

What Blackstar ID:Core Stereo 40 V4 brings here leans toward high gain — that's worth building a pairing around

Goes in front of the amp