MM4 Modulation Modeler

The blue pedal in Line 6's original stompbox modeler series handled modulation effects. Chorus, flanger, phaser, tremolo, vibrato, rotary speaker, and univibe models fill the 16 slots.

Four knobs adjust effect-specific parameters. Three user presets store settings. Expression pedal input enables real-time modulation control for swells and sweeps.

Alongside the DL4, MM4 became a staple on professional boards. Instant access to classic modulation sounds without buying individual pedals for each effect type.