Pedals that stack with the ENGL E651 Artist Edition

Klon KTR

Run Klon KTR into that transparent platform and it finally gets some medium gain

Sola Sound Tone Bender MkII

Run Sola Sound Tone Bender MkII into that transparent platform and it finally gets some fuzzy

Walrus Audio Voyager Mk II

The transparent tone has headroom to spare — Walrus Audio Voyager Mk II gives it mid-forward to fill it with

MXR Phase 100

Run MXR Phase 100 after ENGL E651 Artist Edition in the signal chain, clear of ENGL E651 Artist Edition's own gain stage

Xotic SP Compressor

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

Walrus Audio Mako R1 Reverb MkII

Keep ENGL E651 Artist Edition's transparent voice out front: Walrus Audio Mako R1 Reverb MkII goes in ENGL E651 Artist Edition's effects loop so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

EarthQuaker Devices Towers

EarthQuaker Devices Towers's ambient voice goes in ENGL E651 Artist Edition's effects loop — it's not there to compete with ENGL E651 Artist Edition's own transparent character — goes in the amp's FX loop (or last, into a clean amp)