MXR M78 DISTORTION

A Classic Distortion, Revisited in a "Badass" Style

With the Custom Badass '78 Distortion, MXR follows in the footsteps of a distortion that became iconic in the late '70s: a thick, punchy sound capable of going from a muscular crunch to a raging saturation. Vintage models are sought after for their massive grain and personality, popularized by guitarists like Jeff Beck and Joe Perry, but they are not always the most reliable on the road. The idea here is clear: to recapture the spirit of the original circuit while offering a pedal designed to withstand rehearsals, gigs, and modern pedalboards.

Who Is It For, Which Styles, and In What Contexts?

This distortion is aimed at guitarists who want a primary gain pedal with a distinct character, while retaining enough versatility to cover several styles. In blues rock and classic rock, it adds density and easily controllable sustain. In punk, garage, and alternative rock, it can become rougher and almost fuzzy when pushed. Even in more subdued contexts, some appreciate its fluid and organic texture for singing leads.

On an already crunchy amp, the MXR can serve as an additional layer to thicken the low end and bring out harmonics. On a clean channel, it becomes a true distortion platform: practical for a simple pedalboard, a fixed backline, or to maintain a consistent sound between home, studio, and stage.

Familiar Controls with a Real "Plus" Mode

The Custom Badass '78 Distortion gets straight to the point: Output adjusts the output level, Distortion controls the amount of gain, and Tone lets you tweak brightness to suit your guitar, pickups, and amp. The behavior is designed to remain usable across a wide range of settings, without forcing you to hunt for the "sweet spot" for hours.

The real signature of this pedal is the Crunch switch. When activated, it delivers a more dynamic, wider response with distortion that gains harmonic complexity. The result: livelier riffs, more expressive pick attacks, and more present leads without necessarily needing an external boost.

Finally, the true hard bypass is a clear advantage on a pedalboard: when the pedal is off, your tone remains direct, without coloration imposed by the circuit.

The Sound

Expect a thick distortion with a generous low end and a gain feel that fills the space well, ideal for power chords and rhythms that need to "hold" the song. The grain can range from a robust crunch to a more aggressive saturation, with a slightly fuzzy edge when pushed, perfect for punk and raw rock textures. The Tone control allows you to shift from a dark, massive sound to a sharper attack to cut through a dense mix.

The pedal responds well to playing dynamics: lowering the guitar volume yields a more controlled dirt level, while playing harder brings out bite and harmonics, especially in Crunch mode. It's an analog distortion designed for the musician who wants personality but also efficiency, without unnecessary complexity.

Technical specifications

Effects	Distortion / Overdrive / Fuzz, Fuzz, Distortion, Overdrive	EQ	Tone
Technology	Analog	Settings	tone
Format	Pedal	Type	sector
Inputs	Jack	Use	guitar
Outputs	Jack	Color	Red
True bypass	Yes	Power supply included	No
Switch	Crunch	Power supply	9V battery, DC 9 V

Category	distortion / overdrive / fuzz	Current required	200 mA
Expression pedal	no	Power supply compatibility	ECB003E or DCB10 adapter, or 9 V 200 mA power supplies like BOSS PSA, KORG KA189, ZOOM AD16