MXR M84 Bass Fuzz Deluxe
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Manufacturer Information
MXR
https://www.jimdunlop.com
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Algam SAS
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Bass fuzz: a classic, revisited to keep the low spectrum
On a bass, fuzz can quickly erase attack and definition, especially in a band setting. This is precisely the advantage of a dedicated fuzz: offering a generous saturated grain while giving the player control over the fundamental tone. With a simple, analog architecture, this pedal aims for efficiency: a "bigger than life" sound, easy to fit into a mix, without multiplying menus or modes.
In a pedalboard, it naturally serves as a strong color: to thicken a riff, highlight a hook, or turn a bass line into a true wall of sound. The Dry/Wet pair allows anchoring it in the low register, maintaining clarity that makes a difference both live and in the studio.
For whom, and in which styles?
This pedal is designed for bassists who want a fuzz-type distortion without hassle: one setting, play, it sounds great. It suits beginners discovering effects as well as experienced musicians looking for a compact fuzz that's quick to dial in on stage.
Style-wise, it feels at home in rock, stoner, garage, punk, metal (as a complement to tighter distortion), but also in indie and electro contexts for dirty, synthetic textures. In the studio, the Dry/Wet mix helps keep a solid foundation without having to duplicate the track in parallel.
Technical specifications
| Effects | Distortion / Overdrive / Fuzz, Bass, Fuzz, Distortion, Bass Fuzz | Number of tracks | 1 |
| Technology | Analog | EQ | Tone |
| Format | Pedal | Settings | tone |
| Inputs | Jack | Use | Bass, Pedalboard |
| Outputs | Jack | Color | Orange |
| True bypass | Yes | Power supply included | No |
| Number of effects | 1 | Power supply | 9V battery, DC 9 V |
Questions frequently asked
How does the Dry/Wet mix preserve the bass on this bass fuzz?
The Dry and Wet controls allow separate blending of the direct signal and the fuzz signal. The Dry channel preserves the fundamental and attack, while Wet adds saturation. This combination helps maintain note clarity in a busy mix.
What power supply is needed for this pedal?
The pedal operates with a 9 V battery or a 9 V DC power supply. The power adapter is not included.
What type of sound does the MXR M84 Bass Fuzz Deluxe produce?
The analog circuit delivers a thick fuzz with natural compression and pronounced harmonics. The Fuzz control ranges from a slightly abrasive grain to dense saturation. The Tone control then allows darkening the sound or enhancing presence.
What connectivity is available?
The inputs and outputs use 6.35 mm jacks, for standard integration in a bass effects chain.
Is this fuzz suited for stoner and metal?
In stoner, garage, punk, or metal styles, the Fuzz and Tone controls provide a saturated texture suitable for massive riffs. The Dry/Wet blend preserves a useful bass foundation alongside heavily driven guitars.



