Pedals that stack with the Fender 'Black Panel' Twin Reverb (1963-1967)

Boss DS-2 Turbo Distortion

“I use this on the clean channel with a Vox guitar with a boss ds-2 for higher gain”

Tone City Model B Distortion TC-T31

Into a transparent tone, Tone City Model B Distortion TC-T31 brings the high gain it's missing

Catalinbread Formula 5F6

Catalinbread Formula 5F6's mid-forward fills in what this transparent tone doesn't make on its own

Origin Effects MAGMA57 Amp Vibrato & Drive

Run Origin Effects MAGMA57 Amp Vibrato & Drive after Fender 'Black Panel' Twin Reverb (1963-1967) in the signal chain, clear of Fender 'Black Panel' Twin Reverb (1963-1967)'s own gain stage

Origin Effects SlideRIG Compact Deluxe

Origin Effects SlideRIG Compact Deluxe leans toward compressed, and that's a real, usable character to pair with

Electro-Harmonix Memory Boy Analog Delay

Put Electro-Harmonix Memory Boy Analog Delay in Fender 'Black Panel' Twin Reverb (1963-1967)'s effects loop, clear of Fender 'Black Panel' Twin Reverb (1963-1967)'s own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Boss RV-6 Reverb

Boss RV-6 Reverb's shimmer voice goes in Fender 'Black Panel' Twin Reverb (1963-1967)'s effects loop — it's not there to compete with Fender 'Black Panel' Twin Reverb (1963-1967)'s own spring character — goes in the amp's FX loop (or last, into a clean amp)