MXR M84 Bass Fuzz Deluxe

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$152.28 to $173.00 Price Tier: Standard

4.5 (23)

1 Critic Review

5 Reviews

All time low price

Find out who is using MXR M84

3 community setups

10 wishlisted

53 saved

Page last updated Jul 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 6 stores. Prices updated July 4, 2026.

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Reviews

Price

4.5 (12)

$159.99 $152.28 $7.71 · All time low

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5.0 (1)

$159.99

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4.6 (62)

$152.28 New

$142.89 Used (Like New)

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5.0 (10)

$152.28 34 available New

$81.00 17 available Used

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4.5 (42)

$174.00 $173.00 $1.00 · All time low

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£149.50

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Average Price: $145

Standard/Professional

$70

$201+

Price Tier

In the Bass Effects Pedals category, MXR M84 Bass Fuzz Deluxe is priced in the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

Budget

Standard

High-end

Price History

Based on price data from 3 merchants for "MXR M84 Bass Fuzz Deluxe". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Unlock the gritty essence of vintage fuzz with the MXR M84 Bass Fuzz Deluxe, your ticket to a sonic landscape where the richness of germanium meets the precision of modern engineering. Ideal for the bassist aiming to blend the aggressive punch of fuzz with their instrument's natural voice, this pedal stands as a testament to MXR's commitment to quality and tonal versatility. Whether you're painting soundscapes in psychedelic hues, laying down garage rock's raw power, or channeling the spirit of classic rock, the M84 Bass Fuzz Deluxe offers a refined yet raucous fuzz that integrates seamlessly with your bass's authentic tone. With its distinct blend of wet and dry controls, this pedal doesn't just add texture; it invites you into an exploratory musical journey, ensuring that your bass retains its character even as it roars.

Key Features:

Vintage germanium character for a classic, warm fuzz tone
Separate wet and dry controls to fine-tune your sound mix
Hardwire bypass for unaltered signal integrity when the pedal is off
Designed specifically for bass frequencies, ensuring clarity and punch
Compact design, making it a perfect addition to any pedalboard

Product specs

Pedal Type	Bass Fuzz
Analog/Digital	Analog
Inputs	1 x 1/4"
Outputs	1 x 1/4"
Bypass Switching	True Hardwire
EQ	Tone Control
Controls	Fuzz
Power Source	9V DC power supply (sold separately)
Batteries	1 x 9V
Power Usage	11mA
Height	2.12" (including knobs)
Width	2.62" (including jacks)
Depth	4.37"
Weight	0.51 lbs.

FAQs

What type of power supply does the MXR M84 Bass Fuzz Deluxe require?: The MXR M84 Bass Fuzz Deluxe requires a 9V DC power supply, which is sold separately. It can also operate with a 9V battery.
Is the MXR M84 Bass Fuzz Deluxe suitable for maintaining low-end clarity on bass?: Yes, the MXR M84 Bass Fuzz Deluxe is designed to preserve the low-end clarity of your bass signal while providing a bold and cutting fuzz tone.
Does the MXR M84 Bass Fuzz Deluxe have true bypass switching?: Yes, the MXR M84 Bass Fuzz Deluxe features true hardwire bypass, ensuring that your signal remains unaffected when the pedal is turned off.
How does the tone control on the MXR M84 Bass Fuzz Deluxe work?: The tone control on the MXR M84 Bass Fuzz Deluxe affects only the fuzz signal, allowing you to shape the fuzz tone without altering the clean signal of your bass.
Can the MXR M84 Bass Fuzz Deluxe be used with other instruments besides bass?: While the MXR M84 Bass Fuzz Deluxe is optimized for bass, it can also be used with other instruments, though the sound characteristics are specifically tailored for bass frequencies.

Videos

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Reviews

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PROS

Controls allow for good bass feel with added fuzz
Quality of fuzz stands out among many
Versatile, with ability to control from slight to heavy fuzz
Separate wet/dry controls for better sound mixing
Enhances sound without losing bass thump
Solid build quality, suitable for gigging
True bypass switching for clean signal path
Can achieve a wide range of fuzz sounds
Paint job is visually appealing
Works well for both bassists and guitarists

CONS

Uppermost harmonic can be strident
Dry control used sparingly to avoid static-like sound
Does not produce over-the-top aggressive fuzz tones
Only affects mids and high frequencies, not the best for bass-only settings
Some feedback issues reported with certain bass models

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about MXR M84 Bass Fuzz Deluxe.

Features and functionality

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Users find the blend knob essential for preventing the fuzz from getting lost in the mix, offering better control over the sound.
Source
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The MXR M84 is praised for its compact size, making it ideal for pedalboards with limited space compared to larger options like the EHX Big Muff Deluxe Bass.
Source
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The MXR M84 Bass Fuzz is praised for its ability to add a low-end boost when used with guitar, enhancing its versatility across instruments.
Source

Use cases and applications

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The pedal excels in delivering a phat synthy sound, especially effective when played around the 7th to 12th fret.
Source
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It's ideal for synth-inspired tones, with the tone control wide enough to capture Radiohead vibes, notably in "Burn the Witch".
Source
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It's highlighted for maintaining bass lows while allowing a fuzz tone mix, making it suitable for genres requiring a robust low-end presence.
Source

Comparisons

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While MXR is favored for its fuzz, some users gradually shift to Walrus Audio pedals for other effects, suggesting a personal tonal preference.
Source
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Compared to the EHX Big Muff Deluxe Bass, the MXR M84 is favored for its true fuzz sound, while the EHX is perceived more as distortion and sustain-focused.
Source
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Users find the MXR M84 superior to pedals like the MXR Brown Acid and EarthQuaker Devices Hoof for retaining low end on bass and boosting lows on guitar.
Source

Mods and upgrades

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Owners often consider the MXR Bass Distortion next, praised as an underrated collaboration with Fuzzrocious for its versatility.
Source

User experience

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Owners often rediscover the M84's appeal after considering selling it, noting its impressive sound quality and versatility for both bass and guitar.
Source
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Owners report a notable enhancement in low-end clarity when using the M84, compared to other fuzz pedals that often cut bass frequencies.
Source

Value and pricing

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The MXR M84 can often be found on Reverb for around $80, making it an affordable option for those seeking a quality bass fuzz pedal with a blend knob.
Source

Critic Reviews

MXR M84 Bass Fuzz Deluxe Pedal Review - Premier Guitar

premierguitar.com

The MXR M84 Bass Fuzz Deluxe is a robust and versatile pedal that successfully addresses bassists' long-standing issues of getting lost in the mix. It offers a formidable range of fuzz tones that can fill a room with ease, along with separate volume controls for dry and wet signals, allowing for greater tonal flexibility. This pedal shines with its thick, muscular fuzz, making it a go-to for fans of stoner-rock and heavy bass lines. However, its powerful output might be overwhelming for those accustomed to a subtler presence in the mix. Overall, the M84 is a valuable tool for bassists seeking to maintain sonic clarity amidst distortion, earning a solid recommendation.

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Full Review

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4.5 out of 5

Based on 5 Reviews and 23 Ratings

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1 star

dhorton

222

over 1 year ago

Sustain for days!

Fuzzed out bass is a beautiful sound and this pedal does it extremely well. The ability to mix the original signal (dry) with the fuzz (wet) is what sold me on this one. Get the fuzz without losing the thump... if that makes sense.

Roles:

Bassist

brandon_bolderoff

770

about 11 years ago

this fuzz does NOT effect the lowend

if you crank a fuzz and the mid and the high on your amp if off, does the fuzz make a sound? mxr bass fuzz deluxe doesn't. if your amps bass knob is the only knob on, you will NOT hear any fuzz when the pedal is engaged. mxr bass fuzz deluxe only effects the mids and high frequencies. this pedal cuts in the mix, others may say otherwise. i have no problem cutting through. the pedal sounds great with my gretsch g5123b, when i'm not getting feed back. maybe i'm cutting through because of the hollowbody's feedback? best way to describe this fuzz is stoner rock or black sabbath sounding fuzz. i come up with so many fuzz tones, and it's so easy to use. i always keep the dry knob at 12 o'clock.

dario_venturi

254

almost 9 years ago

Dunlop makes a great fuzz pedal

new bassist style need pedalboard. By my opinion fuzz is a one of those pedal that you need. Great. With wet and dry controls you use it for booster.

Roles:

Singer Bassist Composer

Genres:

Rock Alternative rock Psychedelic rock

serdar_kalayci

almost 9 years ago

Great fuzz pedal and extremely flexible

Great fuzz pedal and extremely flexible due to its dry/wet blend options.

bradentheguitarist

over 10 years ago

The entirety of my distortion

Despite it being a bass pedal and me being a guitarist, this thing is just about everything I use for distortion effects. It makes everything sound amazing.