The MXR Fat Sugar Overdrive, sold by MXR as the Fat Sugar Drive, is an overdrive pedal that takes the Sugar Drive's clear, transparent overdrive tones and puts them in MXR's classic full-size housing, aimed at players who prefer that footprint to a mini pedal1. MXR describes its range as everything from a sauced-up boost to full-on blow-tube distortion1.
What it does
The pedal's versatility comes from its Drive control, which replicates an amp's transition from clean to dirty by blending the clean signal at the start of the sweep1. In practice that means the pedal can sit in front of an amp as a boost and then push into progressively dirtier territory as the control is turned up, without the abrupt jump some overdrives make.
MXR also built in what the company calls a voltage doubler, which increases overall headroom and opens up the sound of the pedal1. More headroom means the circuit has more room before it clips, which is part of how the pedal keeps its character at higher settings.
Controls
| Control | What it does |
|---|---|
| Volume | Sets the pedal's output level3 |
| Tone | Shapes the treble character of the overdrive3 |
| Drive | Blends the clean signal at the start of the sweep, following an amp's clean-to-dirty transition1 |
What reviewers said
Guitar Pedal X's reviewer Stefan Karlsson, writing in September 2025, was positive about the pedal's range and its behavior as gain rises3:
"This is a an excellent bassed-up overdrive with expansive range, and a super cool secondary purpose"3
Stefan Karlsson, Guitar Pedal X3
The same review noted the pedal's "super cool secondary purpose" without the page needing to spell out what that is; the reviewer's full piece covers it in the context of Klon-style circuits3.
Where it sits in MXR's overdrive range
The Fat Sugar Drive is one of several overdrives MXR builds alongside pedals like the Duke of Tone, the Timmy and the EVH5150 Overdrive. Its distinguishing feature within that lineup is the transparent, Klon-style approach inherited from the Sugar Drive, in the larger classic MXR enclosure rather than a mini housing1. For more on the category, see the site's guide to overdrive pedals.
Videos
The Music Addict
The Pedal Picassos
Kyle Campbell Guitar
Questions
What is the difference between the MXR Fat Sugar Drive and the Sugar Drive?
The Fat Sugar Drive takes the Sugar Drive's clear, transparent overdrive tones and puts them in MXR's classic full-size housing, which some players prefer over the mini enclosure of the original. The circuit's approach is the same: a Drive control that blends the clean signal at the start of its sweep, so the pedal follows an amp's transition from clean to dirty.
How much does the MXR Fat Sugar Overdrive cost?
Guitar Pedal X listed the MXR Fat Sugar Overdrive at $129 in its September 2025 review. Prices change over time, so the current price may differ.
Sources (3)
- MXR® FAT SUGAR™ DRIVE, Jim Dunlop (jimdunlop.com)
- M94SE.pdf, Jim Dunlop, 2022
- Guitar Pedal X, Guitar Pedal X, 2025-09-03
