Pedals that stack with the T-Rex Karma Boost

JHS Smiley

Run JHS Smiley into that transparent platform and it finally gets some fuzzy

Pigtronix Octava Micro

The transparent tone has headroom to spare — Pigtronix Octava Micro gives it high gain to fill it with

EarthQuaker Devices Grand Orbiter

Put EarthQuaker Devices Grand Orbiter after T-Rex Karma Boost in the signal chain, clear of T-Rex Karma Boost's own gain stage

Xotic SP Compressor

What Xotic SP Compressor brings here leans toward mid-forward — that's worth building a pairing around

Malekko Electro-Harmonix Memory Toy Analog Delay

Put Malekko Electro-Harmonix Memory Toy Analog Delay after T-Rex Karma Boost in the signal chain, clear of T-Rex Karma Boost's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Old Blood Noise Endeavors BL-44 Reverse

Put Old Blood Noise Endeavors BL-44 Reverse after T-Rex Karma Boost in the signal chain, clear of T-Rex Karma Boost's own gain stage — goes in the amp's FX loop (or last, into a clean amp)