Pedals that stack with the Carol-Ann OD-2R

Pigtronix Octava Micro

Run Pigtronix Octava Micro into that transparent platform and it finally gets some high gain

EarthQuaker Devices Hizumitas

Run EarthQuaker Devices Hizumitas into that transparent platform and it finally gets some high gain

Klon KTR

Klon KTR's medium gain fills in what this transparent tone doesn't make on its own

EarthQuaker Devices Grand Orbiter V3

Keep Carol-Ann OD-2R's transparent voice out front: EarthQuaker Devices Grand Orbiter V3 goes after Carol-Ann OD-2R in the signal chain so its low gain voice doesn't muddy it

Xotic SP Compressor

Xotic SP Compressor's own mid-forward character is the real reason this is worth trying

Fender Hammertone Reverb

Run Fender Hammertone Reverb in Carol-Ann OD-2R's effects loop, clear of Carol-Ann OD-2R's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Old Blood Noise Endeavors BL-44 Reverse

Old Blood Noise Endeavors BL-44 Reverse's ambient voice goes in Carol-Ann OD-2R's effects loop — it's not there to compete with Carol-Ann OD-2R's own transparent character — goes in the amp's FX loop (or last, into a clean amp)