### What This Modification Is

This is a **Line 6 MM4 Modulation Modeler** upgraded with popular reliability and live-performance mods:

1. **Heavy-Duty Footswitch Upgrade:** The stock spring-actuator switches on the classic Line 6 "4-button" series are notorious for mechanical failure. All bottom switches have been upgraded to rugged, hard-wearing stompbox-style switches.

2. **Top Foot-Control Dial (Expression/Parameter Mod):** An oversized, fluted chicken-head/skirt knob installed on the top deck allows foot adjustment of a critical parameter (typically wired to **Speed/Rate**, **Mix**, or mimicking an internal expression sweep) without having to bend down mid-song.

3. **Auxiliary Top Footswitch:** An additional upper stomp switch installed beside the knob (commonly wired as a dedicated tap tempo, preset toggle, or master bypass).

4. **Pedalboard Prep:** The bottom battery cover plate has been removed to allow flush mounting or internal routing on a pedalboard.

### Reverb Listing Draft

**Listing Title:**

Line 6 MM4 Modulation Modeler with Foot-Control & Heavy-Duty Switches Mod

**Category:** Effects Pedals > Chorus and Vibrato / Flanger / Phaser / Tremolo

**Description:**

Up for sale is a customized **Line 6 MM4 Modulation Modeler** loaded with legendary modulation algorithms (Opto & Bias Tremolo, Uni-Vibe, Phase 90, Tri-Chorus, Dimension, Jet Flanger, Rotary Speaker, and Ring Modulator).

This unit includes practical stage and reliability modifications:

* **Heavy-Duty Stomp Switches:** Replaced the fragile stock Line 6 momentary spring actuators with durable mechanical footswitches for reliable gigging.

* **Foot-Control Parameter Mod:** Oversized top-mounted dial wired for easy on-the-fly foot adjustments on stage (ideal for dialing modulation speed or sweep in real time).

* **Auxiliary Upper Stomp Switch:** Extra switch mounted on the top chassis for quick-access control.

* **Condition:** Fully tested and working. Cosmetic player wear with authentic scuffs and paint chips around the edges of the metallic blue casing consistent with stage use. Battery door plate removed underneath for pedalboard mounting.