Pricing and availability
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Average Price: $153
Standard/Professional
$70
$201+
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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
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Is the MXR M85 Bass Distortion suitable for live performances?
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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.
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What kind of power supply does the MXR M85 Bass Distortion require?
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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.
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How does the MXR M85 Bass Distortion handle low-end frequencies?
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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.
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Can the MXR M85 Bass Distortion be used with a guitar?
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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.
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Does the MXR M85 Bass Distortion have a blend control feature?
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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.
Videos
jimdunlopusa
MXR Bass Distortion
Reviews
PROS
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Maintains low end while adding distortion
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Wide range of dirt levels, from subtle to heavy
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Compatible with down-tuned basses for heavier music genres
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Natural sounding distortion, not overly digital
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Allows for experimental sound exploration
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Features both LED and Silicon distortion types
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Separate volume controls for clean and distorted signal
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Works well with analog sub octaves
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Solid build quality, durable construction
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Compatible with other MXR products for enhanced sound
CONS
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Footswitch could be improved with a soft switch
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Can sound too thin for some tastes without adjusting the dry knob
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May be too loud and unbalanced when dry knob is cranked
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Lacks versatility, seen as a "one-trick pony" by some users
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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
User experience
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Many users find the clean blend primarily restores clean top end and attack rather than adding low end.
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Some owners feel the blend control on the MXR Bass Distortion sounds like two separate signals rather than a cohesive mix.
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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.
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Use cases and applications
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Often used as the last drive in the chain to resolve stacking issues due to its unique tonal character.
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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.
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When combined with the Way Huge Swollen Pickle, the MXR M85 can produce intense feedback and chaotic distortion, ideal for experimental or noise music.
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Comparisons
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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.
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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.
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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
4.0 out of 5
Based on 1 Review and 12 Ratings
Artist usage
Add artist
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
Mark Michell's website, under the gear section, confirms that he uses the MXR M85 Bass Distortion pedal.
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use MXR M85 Bass Distortion, it is most commonly used with the following gear.
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