Pedals that stack with the Blackstar HT Club 50 MKIII 2-Ch 50-Watt Tube

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

Keeley Red Dirt Overdrive pushes a high gain tone 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 → clean boost)

Stack Catalinbread VariOboost on top and a high gain tone tightens toward clean boost

Goes in front of the amp

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

JAM Pedals Tubedreamer takes that high gain character and pushes it toward mid-forward

Goes in front of the amp

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

Electro-Harmonix M76 Studio Compressor's own compressed character is the real reason this is worth trying

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 ZVEX Instant Lo-Fi Junky after Blackstar HT Club 50 MKIII 2-Ch 50-Watt Tube in the signal chain, clear of Blackstar HT Club 50 MKIII 2-Ch 50-Watt Tube'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.

Run TC Electronic Triple Flashback Delay in Blackstar HT Club 50 MKIII 2-Ch 50-Watt Tube's effects loop, clear of Blackstar HT Club 50 MKIII 2-Ch 50-Watt Tube'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 → ambient)

Keep Blackstar HT Club 50 MKIII 2-Ch 50-Watt Tube's high gain voice out front: Mooer A7 Ambience goes in Blackstar HT Club 50 MKIII 2-Ch 50-Watt Tube'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