Pedals that stack with the Positive Grid Spark EDGE 4-Channel 65W Modeling Combo

Friedman BE-OD

Friedman BE-OD pushes a high gain tone toward tight

Marshall Guv'nor

Marshall Guv'nor pushes a high gain tone toward mid-forward

Beetronics Buzzter Boost Preamp

Beetronics Buzzter Boost Preamp takes that high gain character and pushes it toward clean boost

Electro-Harmonix Deluxe Electric Mistress

Electro-Harmonix Deluxe Electric Mistress's modulated voice goes after Positive Grid Spark EDGE 4-Channel 65W Modeling Combo in the signal chain — it's not there to compete with Positive Grid Spark EDGE 4-Channel 65W Modeling Combo's own high gain character

Hungry Robot Moby Dick V2

Run Hungry Robot Moby Dick V2 in Positive Grid Spark EDGE 4-Channel 65W Modeling Combo's effects loop, clear of Positive Grid Spark EDGE 4-Channel 65W Modeling Combo's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Free the Tone Future Factory FY-1

Run Free the Tone Future Factory FY-1 in Positive Grid Spark EDGE 4-Channel 65W Modeling Combo's effects loop, clear of Positive Grid Spark EDGE 4-Channel 65W Modeling Combo's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Warm Audio Pedal 76 Compressor

Warm Audio Pedal 76 Compressor's own tight character is the real reason this is worth trying