Pedals that stack with the Horizon Devices Apex Preamp

Electro-Harmonix Deluxe Electric Mistress

Keep Horizon Devices Apex Preamp's tight voice out front: Electro-Harmonix Deluxe Electric Mistress goes after Horizon Devices Apex Preamp in the signal chain so its modulated voice doesn't muddy it

Suhr Shiba Drive

Stack Suhr Shiba Drive on top and a high gain tone tightens toward mid-forward

Xotic EP Booster

Feed a high gain signal into Xotic EP Booster and it comes out closer to clean boost

Wampler Cory Wong

Wampler Cory Wong's own clean boost character is the real reason this is worth trying

Walrus Audio Fathom

Put Walrus Audio Fathom after Horizon Devices Apex Preamp in the signal chain, clear of Horizon Devices Apex Preamp's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Hungry Robot Moby Dick V2

Keep Horizon Devices Apex Preamp's tight voice out front: Hungry Robot Moby Dick V2 goes after Horizon Devices Apex Preamp in the signal chain so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)