3Leaf Audio Proton Envelope Filter Pedal Mk4

Controls & Settings

Gear Description & Specs

The 3Leaf Audio Proton Mk4 continues the evolution of the popular Proton envelope filter series. Designed for improved tracking and expanded tonal control, the Mk4 delivers expressive auto-wah effects that respond naturally to playing dynamics. Guitarists and bassists can dial in subtle filter movement or dramatic funk sweeps using the pedal’s intuitive control layout. Built with boutique craftsmanship, the Proton Mk4 offers warm analog character and reliable performance in both live and studio environments. Discover tone settings and pedalboard applications for the 3Leaf Audio Proton Mk4 on PedalPlex.

3Leaf Audio filter