Pedals that stack with the Dunlop Rockma Rockman Metal Ace

Catalinbread Elements Distortion

Catalinbread Elements Distortion leans toward full, and that's a real, usable character to pair with

Amptweaker Big Rock Pro

The Metal Ace's compressed practice-level distortion gives Big Rock Pro's fat, modern boost a tighter, gated front end.

Walrus Audio Fable

Put Walrus Audio Fable after Dunlop Rockma Rockman Metal Ace in the signal chain, clear of Dunlop Rockma Rockman Metal Ace's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Carl Martin Classic Opto-Compressor

Carl Martin Classic Opto-Compressor leans toward transparent, and that's a real, usable character to pair with

MXR ZW90 Wylde Phase

Run MXR ZW90 Wylde Phase after Dunlop Rockma Rockman Metal Ace in the signal chain, clear of Dunlop Rockma Rockman Metal Ace's own gain stage

Line 6 DL4 Delay Modeler

Line 6 DL4 Delay Modeler's warm voice goes after Dunlop Rockma Rockman Metal Ace in the signal chain — it's not there to compete with Dunlop Rockma Rockman Metal Ace's own compressed character — goes in the amp's FX loop (or last, into a clean amp)