MXR M77 Custom Badass Modified OD Review (June 2024)


Last updated on June 12, 2024 11:20 am Details


In this review post, we’re going to be discussing the MXR M77 Custom Badass Modified OD, including an overview of its unique features.

Product Description

The Custom Badass Modified O.D. features a classic overdrive circuit with modern modifications for improved performance and versatility.

For added flexibility, we’ve added a 100HZ cut and boost control that allows for a more focused EQ when cut, or a beefier tone when boosted. The Bump switch engages an alternate EQ voicing that boosts the lows and mids. Put it in front of the ’78 Custom Badass Distortion for a slew of amp-like gain structures that won’t mask your tone.

Product Features

  • 2 Status LED
  • Sturdy metal housing
  • Operation via 9V battery 
  • Analogue distortion pedal
  • Controls for output, tone, and distortion
  • “Bump” switch for alternative voicing with bass and mid-boost
  • Modified M78 pedal with additional 100 Hz cut and boost control

Pros & Cons


  • Solid build quality
  • Affordably priced
  • Extremely reliable
  • Positive consumer ratings
  • Worth the price
  • Fantastic sound quality
  • Perfect for recording and live performances


  • There aren’t many

MXR M77 Custom Badass Modified OD Demo

Our Verdict

With the Custom Badass Modified O.D, MXR achieves an admirable balancing act. It’s a thoughtfully crafted pedal—rangy, full of character, and capable of what at times appears to be a million different voices. Low gain settings make this pedal ideal for jangly roots rock that requires a kick, Stonsey chug, or adding dirt and boosts to a clean 6L6 amp. Turn up the gain, tone, and 100 Hz dials and place it in front of a hotter amp for a searing metal lead voice.

Modified O.D. is an abbreviation for Ordinary Diameter Modified O. isn’t completely transparent, but at low-gain settings, it adds a few pounds of muscle without losing the voice of your guitar. And, while it’s not the only overdrive with more tone-shaping options than your average TS clone, you won’t be chasing your tail in an EQ adjusting maze. It’s really simple to discover a tone, and it’s also fairly simple to return to where you were when you go on. It’s a very neat bit of engineering on that front. And, at roughly $100, it’s a contender for the overdrive division’s performance-to-value gold. This is a badass pedal for more reasons than one.

Where to Buy

The best place to buy this product has to be Amazon, due to their competitive pricing and fantastic customer service.

MXR M77 Custom Badass™ Modified O.D.

as of June 10, 2024 7:13 am

Pricing History

Price History for MXR M77 Custom Badass™ Modified O.D.


Current Price $119.99 June 10, 2024
Highest Price $119.99 November 17, 2023
Lowest Price $119.99 November 17, 2023
Since November 17, 2023

Last price changes

$119.99 November 17, 2023

Last updated on June 10, 2024 7:13 am

Buyers Guides This Product Is Featured In

Best Overdrive Pedals

Overdrive Pedals Under $100 (2022)

Additional information

Item Weight

11.2 ounces

Product Dimensions

5.5 x 4.4 x 2.6 inches

Domestic Shipping

Item can be shipped within U.S.

International Shipping

This item can be shipped to select countries outside of the U.S. Learn More

Country of Origin


Item model number



1 9V batteries required.

Is Discontinued By Manufacturer


Date First Available

November 22, 2011

Color Name



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