Pedals that stack with the Fender Pro Junior IV

pushes an amp at the edge of breakupPushes an amp already sitting at the edge of breakup over the line. (edge of breakup → mid-forward)

Catalinbread Formula 5F6 takes that edge of breakup character and pushes it toward mid-forward

Goes in front of the amp

pushes an amp at the edge of breakupPushes an amp already sitting at the edge of breakup over the line. (edge of breakup → low gain)

Feed a edge of breakup signal into EarthQuaker Devices '- Speaker Cranker and it comes out closer to low gain

Goes in front of the amp

pushes an amp at the edge of breakupPushes an amp already sitting at the edge of breakup over the line. (edge of breakup → mid-forward)

Greer Tomahawk's own bright character is the real reason this is worth trying

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)

What Origin Effects SlideRIG Compact Deluxe brings here leans toward compressed — that's worth building a pairing around

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 JHS 3 Series Harmonic Tremolo after Fender Pro Junior IV in the signal chain, clear of Fender Pro Junior IV'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 Strymon BigSky in Fender Pro Junior IV's effects loop, clear of Fender Pro Junior IV'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.

Malekko Electro-Harmonix Memory Toy Analog Delay's modulated voice goes in Fender Pro Junior IV's effects loop — it's not there to compete with Fender Pro Junior IV's own edge of breakup character — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop