Line 6 MM4 Modulation Modeler main image

Photo of Line 6 MM4 Modulation Modeler and more gear in a pedalboard, studio, and guitar

Line 6 MM4 Modulation Modeler

^# 37

Equipboard's ranking is determined by analyzing factors such as professional artist usage, popularity, user ratings, reviews, and more.

$89.00 Price Tier: Budget

4.0 (49)

1 Critic Review

9 Reviews

This product is Vintage or Discontinued

Find out who is using Line 6 MM4

8 community setups

34 wishlisted

134 saved

Page last updated Jul 03, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated July 3, 2026.

Store

Reviews

Price

4.0 (29)

$89.00 9 available Used

View Deal

Average Price: $89

Budget/Beginner

$150

$601+

Price Tier

In the Multi Effects Pedals category, Line 6 MM4 Modulation Modeler is priced in the Budget/Beginner range. This is great gear to get started with or for creators on a budget.

Budget

Standard

High-end

^* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Edit description

Experience the full spectrum of modulation effects with the Line 6 MM4 Modulation Modeler. This musical marvel packs the power of multiple pedals into one compact unit, making it an essential addition to any guitarist's gear. It's not just about the convenience, the MM4 offers precision control to fine-tune your sound, making it as unique as you are. Whether you're searching for tremolo, vibrato, flanger or phaser effects, the MM4 has you covered.

Key Features:

Comprehensive modulation effects: Includes tremolo, vibrato, flanger, and phaser
Precision control: Fine-grained controls to customize your sound
Compact design: Fits into any pedalboard with ease
Versatility: Ideal for live performances and studio recording
Line 6 quality: Renowned for its sound quality and reliability.

Product specs

Brand	Line 6
Model	MM4 Modulation Modeler
Finish	Blue
Year	2010s
Made In	United States
Categories	Multi-Effects Pedals and Processors
Pedal Format	Floor Unit

FAQs

What types of modulation effects are included in the Line 6 MM4 Modulation Modeler?: The Line 6 MM4 Modulation Modeler includes a variety of modulation effects such as chorus, flanger, phaser, tremolo, and rotary speaker, among others, providing versatile options for shaping your guitar's sound.
Can the Line 6 MM4 Modulation Modeler be used with both electric guitar and bass?: Yes, the Line 6 MM4 Modulation Modeler is suitable for both electric guitar and bass, offering a range of modulation effects that can enhance the sound of either instrument.
Does the Line 6 MM4 Modulation Modeler require a specific power supply?: The Line 6 MM4 Modulation Modeler requires a 9V DC power supply, which is standard for many guitar pedals, ensuring compatibility with most pedalboard power setups.
How many presets can be stored on the Line 6 MM4 Modulation Modeler?: The Line 6 MM4 Modulation Modeler allows you to store up to four presets, enabling quick access to your favorite modulation settings during performances.
Is the Line 6 MM4 Modulation Modeler suitable for live performances?: Yes, the Line 6 MM4 Modulation Modeler is designed for live performances, featuring a durable floor unit format and easy-to-use footswitches for seamless effect changes on stage.

Reviews

Add review

PROS

Wide range of customizable effects
Durable build quality
Allows for easy saving of settings
Modifiable with upgrades to knobs, footswitches
Accurate emulation of classic effects (e.g., Boss Chorus, Leslie, Univibe)
Expression pedal compatibility enhances effect variability
Useful for consolidating multiple modulation effects into one pedal
Some models reportedly have no volume drop issues

CONS

Requires specific power supply due to unique jack and polarity
Older design may lack features of newer models
Volume drop when used with other pedals (though some find it manageable or non-existent)
Cannot mix effects within a single bank
Some effects may not match the quality of dedicated stompboxes
Limitation to one effect at a time

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Line 6 MM4 Modulation Modeler.

Features and functionality

0 0

The MM4 requires a 12v power supply, which some users find cumbersome due to its unique design and fragility.
Source

User experience

0 0

Some owners report perceived volume drops, particularly in effects like phasers and tremolos, though this is less a flaw and more an effect characteristic.
Source

Mods and upgrades

0 0

Owners mention that modding options are available to enhance the MM4, potentially extending its capabilities beyond stock features.
Source
0 0

Drasp mod enhances MM4 with upgraded switches, LEDs, and a 'foot-roller' for seamless transitions between two presets on the same channel.
Source

Value and pricing

0 0

Despite being a legacy model, the MM4 holds nostalgic value for fans of artists like Omar Rodriguez Lopez and Thomas Erak, influencing purchase decisions.
Source
0 0

An owner offered a modded MM4 for $150, indicating the potential resale value for units with enhancements like the Drasp mod.
Source

Comparisons

0 0

The HX One is often recommended over the MM4 for its compact design, modern features, and inclusion of all Helix effects, offering a broader range in a smaller footprint.
Source
0 0

Users often compare the MM4 to the Line 6 M9, noting the latter's versatility with additional effects like delays, reverbs, and a built-in tuner and looper.
Source

Use cases and applications

0 0

The MM4 is seen as a fun practice tool for those new to modulation effects or seeking an affordable entry point without investing heavily in individual pedals.
Source

Critic Reviews

Line 6 MM4 review | MusicRadar

musicradar.com

The Line 6 MM4 Modulation Modeler, a stalwart since 2000, continues to impress with its robust selection of vintage-inspired modulation effects. Its intuitive design, featuring four assignable footswitches and easy-to-use knobs, allows for quick access to multiple effects, making it a versatile tool for any guitarist. While its age shows, the MM4’s functionality and reliability keep it relevant in modern setups. For those seeking a dependable modulation pedal with instant effect switching, the MM4 is a strong contender.

positive

Full Review

Add review

4.0 out of 5

Based on 9 Reviews and 49 Ratings

5 star

4 star

3 star

2 star

1 star

michaelbenson

120

over 11 years ago

Jack of all Trades, Master of None

I don't use modulation effects often enough to justify having individual pedals for everything, but I still want to be able to use phaser, tremolo, and flanger when I want them, so this pedal took care of those needs. It's not perfect, and the effects aren't amazing sounding, but they do the job well enough.

rodrigotaylormusic

119

over 10 years ago

Awesome but...

Pros and couns awesome. Nice simulator as every single Line6 products, but these series FM4-MM4-DL4- has a problem, the drop volume when used in line with other pedals. But, you can solve these dramas making a lil upgrade mod to became TBP and adding an extra patch. The pedal will become an indispensable tool for you sound, truste me! The boring thing is that you can´t mix the fxs per bank, you can´t blend chorus with phaser and else....

fedemoroz

177

almost 11 years ago

Great stompbox

I used to have many modulation stompboxes before buying the MM4: Ibanez CS9 Stereo Chorus, Dunlop Univibe, Boss TR-2 Tremolo and MXR Phase 90. They all sound awesome, but they're too many. The MM4 is a great piece of gear that gets the job done.

quarantinetarantula

1281

11 years ago almost 11 years ago

Great stuff m8

1alaskanassassin

103

almost 11 years ago

Great example of affordable pro level gear

Great! Some of the effects do have a volume drop, but I compensate by eq'ing from the bass. Great phasers, leslie rotary speaker, I use the panning with my bass and 2 powered speakers.