Pedals that stack with the Crazy Tube Circuits Heatseeker Pre-Amp

Colorsound Power Boost

Run Colorsound Power Boost after it and the warm edge settles into something more bright

Keeley Red Dirt Overdrive

Keeley Red Dirt Overdrive pushes a high gain tone toward mid-forward

Electro-Harmonix Deluxe Electric Mistress

Keep Crazy Tube Circuits Heatseeker Pre-Amp's high gain voice out front: Electro-Harmonix Deluxe Electric Mistress goes after Crazy Tube Circuits Heatseeker Pre-Amp in the signal chain so its modulated voice doesn't muddy it

Wampler Ego Compressor

Wampler Ego Compressor's own transparent character is the real reason this is worth trying

Walrus Audio Fathom

Walrus Audio Fathom's ambient voice goes after Crazy Tube Circuits Heatseeker Pre-Amp in the signal chain — it's not there to compete with Crazy Tube Circuits Heatseeker Pre-Amp's own high gain character — goes in the amp's FX loop (or last, into a clean amp)

Hungry Robot The Borderland

Run Hungry Robot The Borderland after Crazy Tube Circuits Heatseeker Pre-Amp in the signal chain, clear of Crazy Tube Circuits Heatseeker Pre-Amp's own gain stage — goes in the amp's FX loop (or last, into a clean amp)