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MXR M85 Bass Distortion Effects Pedal

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Sale Price $125.34 Was: $139.97
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The MXR Bass Distortion dishes out big gnarly tones with all the low end your bottom-dwelling heart desires. Working closely with indie pedal phenom,...Click To Read More About This Product

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Obtain the biggest bass distortion tones on the planet.

The MXR Bass Distortion dishes out big gnarly tones with all the low end your bottom-dwelling heart desires. Working closely with indie pedal phenom, bass dirt guru, and Fuzzrocious Pedals founder Ryan Ratajski, MXR took a famously nasty sounding distortion circuit and re-tooled it for the modern working bass player.

Back in the day, if you wanted to use a distortion pedal and keep your low end intact, you had to split your clean and dirty signals between two amps. With the MXR Bass Distortion, theres no such need. This pedal puts control over the clean/dirty mix right at your feet with separate Dry and Wet level controls. The Tone control, which only affects the distortion signal, is a simple high cut filter for dialing back the top end, and the Distortion control sets the distortion signals intensity.

Finally, the MXR Bass Distortions raunchy sound comes in two flavors, selectable via the LED/SIL switch. The default SIL setting uses silicon clipping diodes for an aggressive, biting sound and a bit of compression, while the LED setting uses LED diodes for a more wide open sound and a nice gain bump.

Co-designed with bass dirt guru/Fuzzrocious Pedals founder Ryan Ratajski
Based on a classic distortion circuit famous for its nasty sound
Separate Dry and Wet level controls
Select between Silicon and LED clipping diodes
Internal control sets the max gain level of LED mode
Get the sound of a split clean/dirty signal chain in a single box

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Review Snapshot

by PowerReviews
MXRM85 Bass Distortion Effects Pedal

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 1 Stars



Reviewed by 2 customers

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(1 of 2 customers found this review helpful)


One of the best bass distortions out right now


from Germantown, MD


  • Grwols
  • Nasty
  • Tracks well and sounds awesome


  • A lil expensive, but pure quality MXR

Best Uses

  • Getting fuzzed out

Comments about MXR M85 Bass Distortion Effects Pedal:

I have every MXR distortion, the Fuzz, the overdrive, a Blue box, a Boss FZ-5 Fuzz, 2 different Big Muffs...needless to say I've always been a distortion junkie, despite being a bass player. In addition to all the pedals, I play all tube amps as well, including Marshall models. Anyways, this pedal is truly beautiful. Yeah, the others have their touch in the mix, but for all around jamming with a nice clean bottom end, while still having that melting face bass distortion , it's great. They really made a nice pedal with this one. Sounds nuts with a wah...

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attitude in a box


from Longmont, CO

About Me Experienced

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Verified Buyer


  • Compact Design
  • Excellent Sound Quality


    Best Uses

    • Amateur Recording
    • Events
    • Home Studio
    • Performances
    • Professional Recording

    Comments about MXR M85 Bass Distortion Effects Pedal:

    First of all, this is not a pedal for players looking only for clean tones. This is a pedal for players who want to punch whoever is within listening range in the face with dirty fuzzy bass. Even on its cleanest setting, you will still get a fair amount of gain boost when the pedal is on. Start turning knobs, and things get grungier from there. Awesome if you're looking for a Fu Manchu type tone! I don't play bass with the group of guys I play with, but I imagine this pedal would help a bass player cut through the mix when playing live. I currently have it running through a 15" Fender 200w rumble with an extension cab loaded with a celestion BL 12 200x. My bass is a washburn t24, passive pickups. I have heard that the M85 may not play well with active pickup basses. Also in my chain is an MXR bass envelope filter and an MXR carbon copy. They all sound killer together! Bottom line is, if you're a player who is looking for some extra punch, fuzz, and power, give the MXR bass distortion a try!

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