Pedals that stack with the Blackstar HT-20R MkII

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

Put Colorsound Overdriver in front and the mid-forward tone leans further toward fuzzy

Goes in front of the amp

gain stackingStacks two gain stages for more saturation than either produces alone. (mid-forward → high gain)

Push the HT-20R's British mids with the Angry Charlie's hard-rock crunch and the two gain stages stack into something bigger.

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)

Xotic BB Preamp's smooth balances out the bright tone

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.

MXR Phase 90's analog warmth voice goes after Blackstar HT-20R MkII in the signal chain — it's not there to compete with Blackstar HT-20R MkII's own transparent character

Goes in front of the amp

Catalinbread Dirty Little Secret Deluxe's own voicing points at Marshall-style amps, and Blackstar HT-20R MkII delivers it — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (warm → bright)

MXR Dyna Comp leans toward bright, 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.

Run Boss DD-3 Digital Delay in Blackstar HT-20R MkII's effects loop, clear of Blackstar HT-20R MkII's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop