Pricing and availability

We compare 600+ stores and found this item at 6 stores. Prices updated .

Sweetwater
5.0 (5)
$159.99
Guitar Center
5.0 (6)
$159.99
Amazon
3.9 (42)
$159.99 New
$119.99 Used (Like New)
Reverb
5.0 (15)
$159.99 New
$115.00 Used
Musician's Friend
5.0 (2)
$159.99
Thomann
4.6 (35)
$160.00 $158.00 $2.00 · All time low

Average Price: $153

Standard/Professional

$70

$201+

Price Tier

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Standard

High-end

Price History

Based on price data from 4 merchants for "MXR M85 Bass Distortion". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Crafted in collaboration with the bass distortion master, Ryan Ratajski, the MXR M85 Bass Distortion pedal is a versatile tool, designed to add a new dimension to your bass tones. This pedal caters to bassists who crave a variety of gnarly tones without sacrificing the essential low end.

The MXR M85 incorporates a distortion circuit that has been thoughtfully re-engineered to meet the demands of modern bass players. The pedal allows you to control the clean and distorted signals independently with the Dry and Wet level controls, meaning there's no need to split your signals between two amps.

The M85 offers two distinct flavors of distortion, selectable via the LED/SIL switch. The SIL setting utilizes silicon clipping diodes for an aggressive, biting sound with a hint of compression. The LED setting, on the other hand, employs LED diodes to produce a more open, voluminous sound. The Tone control is a high cut filter that only affects the distorted signal, providing a helpful tool for reining in overly bright or harsh frequencies.

Key Features:

  • Developed in collaboration with bass distortion guru, Ryan Ratajski
  • Independent Dry and Wet level controls for precise tonal blending
  • LED/SIL switch for choosing between two distinct distortion styles
  • Silicon clipping diodes for an aggressive, biting sound (SIL setting)
  • LED diodes for a more open, voluminous sound (LED setting)
  • Tone control affects only the distorted signal, acting as a high cut filter
  • Compact and robust metal housing suitable for heavy-duty use
  • Status LED for easy visual feedback

Product specs

Pedal Type Distortion
Analog/Digital Analog
Inputs 1 x 1/4"
Outputs 1 x 1/4"
Bypass Switching True Hardwire
EQ Tone Control
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 0.56 lbs.

FAQs

Is the MXR M85 Bass Distortion suitable for live performances?

Yes, the MXR M85 Bass Distortion is designed for live performances with its true hardwire bypass, ensuring transparency when the pedal is off. Its robust construction and analog circuitry deliver consistent, high-quality distortion ideal for stage use.

What kind of power supply does the MXR M85 Bass Distortion require?

The MXR M85 Bass Distortion requires a 9V DC power supply, which is sold separately. It can also be powered by a 9V battery, offering flexibility for different playing situations.

How does the MXR M85 Bass Distortion handle low-end frequencies?

The MXR M85 Bass Distortion is specifically designed for bass guitars, maintaining clarity and punch in the low-end frequencies. Its tone control allows you to shape the sound to retain the bass's natural depth while adding distortion.

Can the MXR M85 Bass Distortion be used with a guitar?

While the MXR M85 is optimized for bass, it can be used with a guitar. However, the tonal characteristics and frequency response are tailored to enhance bass guitars specifically, which may affect the sound when used with a standard guitar.

Does the MXR M85 Bass Distortion have a blend control feature?

Yes, the MXR M85 Bass Distortion features a blend control that allows you to mix the clean signal with the distorted signal. This feature helps retain the natural bass tone while adding the desired amount of distortion.

jimdunlopusa

jimdunlopusa

MXR Bass Distortion

Video thumbnail for MXR Bass Distortion by jimdunlopusa

MXR Bass Distortion

jimdunlopusa

jimdunlopusa

Video thumbnail for MXR M85 Bass Distortion by ProGuitarShopDemos

MXR M85 Bass Distortion

ProGuitarShopDemos

ProGuitarShopDemos

Video thumbnail for Review Demo - MXR Bass Distortion by Premier Guitar

Review Demo - MXR Bass Distortion

Premier Guitar

Premier Guitar

Video thumbnail for MXR Bass Distortion | Reverb Demo Video by Reverb

MXR Bass Distortion | Reverb Demo Video

Reverb

Reverb

Video thumbnail for MXR M85 Bass Distortion Pedal - Sweetwater at Winter NAMM 2015 by Sweetwater

MXR M85 Bass Distortion Pedal - Sweetwater at Winter NAMM 2015

Sweetwater

Sweetwater

Video thumbnail for MXR M85 Bass Distortion - Martin's Monday Pedal Playthrough by Martin Cliffe - Music, Minimalism & Mental Health

MXR M85 Bass Distortion - Martin's Monday Pedal Playthrough

Martin Cliffe - Music, Minimalism & Mental Health

Martin Cliffe - Music, Minimalism & Mental Health

Reviews

PROS

  • Maintains low end while adding distortion

  • Wide range of dirt levels, from subtle to heavy

  • Compatible with down-tuned basses for heavier music genres

  • Natural sounding distortion, not overly digital

  • Allows for experimental sound exploration

  • Features both LED and Silicon distortion types

  • Separate volume controls for clean and distorted signal

  • Works well with analog sub octaves

  • Solid build quality, durable construction

  • Compatible with other MXR products for enhanced sound

CONS

  • Footswitch could be improved with a soft switch

  • Can sound too thin for some tastes without adjusting the dry knob

  • May be too loud and unbalanced when dry knob is cranked

  • Lacks versatility, seen as a "one-trick pony" by some users

  • Limited range of sounds, despite wet/dry options and mode settings

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about MXR M85 Bass Distortion.

Features and functionality

  • The LED mode enhances upper mids for a more muscular tone but may complicate stacking with other drives.

    Source
  • The MXR Bass Distortion includes a clean blend and a Silicon/LED circuit switch for enhanced tonal versatility compared to standard RAT pedals.

    Source

User experience

  • Many users find the clean blend primarily restores clean top end and attack rather than adding low end.

    Source
  • Some owners feel the blend control on the MXR Bass Distortion sounds like two separate signals rather than a cohesive mix.

    Source
  • A user considering the MXR M85 as a replacement for a Big Muff noted its capability for both subtle drives and intense, amp-blowing distortion.

    Source

Use cases and applications

  • Often used as the last drive in the chain to resolve stacking issues due to its unique tonal character.

    Source
  • The MXR Bass Distortion is favored by metal bassists for maintaining low-end presence while adding grit, essential for genres like groove and thrash metal.

    Source
  • When combined with the Way Huge Swollen Pickle, the MXR M85 can produce intense feedback and chaotic distortion, ideal for experimental or noise music.

    Source

Comparisons

  • Users note that the MXR Bass Distortion offers similar tonal characteristics to the ProCo Turbo Rat in LED mode but with the added benefit of a blend control.

    Source
  • Unlike the RAT, the MXR is seen as more versatile due to its co-design with Fuzzrocious, offering a tailored sound specifically for bass guitars.

    Source
  • Some users find the MXR M85 more versatile and affordable than the Fuzzrocious Ram the Manparts, offering a broader range of tones.

    Source

Critic Reviews

MXR M85 Bass Distortion Review - Premier Guitar

premierguitar.com

The MXR M85 Bass Distortion pedal, a collaboration with Fuzzrocious, is a powerhouse for distortion enthusiasts, delivering fierce, raw, and fluid sound. Its dual clipping modes and separate wet/dry volume controls offer a wide spectrum of tones, excelling in high-gain settings while maintaining clarity. The pedal is lauded for its simplicity and affordability, making it a solid choice for bassists seeking aggressive distortion. However, its high-gain capabilities might not suit those seeking subtler tones. Overall, it's a robust and versatile pedal, ideal for modern and classic rock sounds.

positive

4.0 out of 5

Based on 1 Review and 12 Ratings

5 star
4 star
3 star
2 star
1 star
skylinerr

bass disst

BASS makes my bass sound trebley and leadey good for metal

Genres:

Artist usage

Add artist
See how Les Claypool uses MXR M85 Bass Distortion

Les Claypool

Singer, Bassist

Primus

...
Verified via Jimdunlop

Here it lists the bass distorion on Jim Dunlop website

See how Rex Brown uses MXR M85 Bass Distortion

Rex Brown

Bassist

Pantera

...
Verified via Facebook

Loving this new Bass Distortion from my family at MXR! Some of the best distorted Rat tones ever from this little beast! And with the Dry/Wet knobs YOU are totally in control of your low end!" - Rex

See how Elena Tonra uses MXR M85 Bass Distortion

Elena Tonra

Singer, Guitarist

Daughter

...
Verified via Twitter

Pic from Daughter's concert at Rio's Circo Voador.

See how Liam Wilson uses MXR M85 Bass Distortion

Liam Wilson

Bassist

In Flames

...
Verified via YouTube

At 3:26 he explains that he uses this pedal.

See how Mark Michell uses MXR M85 Bass Distortion

Mark Michell

Bassist

Scale The Summit

...
Verified via Mark Michell

Mark Michell's website, under the gear section, confirms that he uses the MXR M85 Bass Distortion pedal.

See how Jop van Summeren uses MXR M85 Bass Distortion

Jop van Summeren

Bassist

De Staat

...
Verified via Photo

This is the pedalboard Moonspinner build for Jop; the MXR is visible

See how Nick Cageao uses MXR M85 Bass Distortion

Nick Cageao

Bassist

Mutoid Man

...
Verified via Premierguitar

Nick Cageao uses the MXR M85 Bass Distortion pedal, as highlighted in the Premier Guitar article "Mutoid Man’s Stephen Brodsky and Nick Cageao: Prog Punk Alchemists."

Used With

Based on how musicians on Equipboard use MXR M85 Bass Distortion, it is most commonly used with the following gear.

Community setups

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brian_ramirez

brian_ramirez

Gear IQ 133

mamukagafrindashvili

mamukagafrindashvili

Gear IQ 279

mamukagafrindashvili

mamukagafrindashvili

Gear IQ 279

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