MXR M300 Digital Reverb Pedal Review (May 2024)


Last updated on May 30, 2024 2:48 am Details


In this review post, we’re going to be discussing the MXR M300 Digital Reverb Pedal, including an overview of its unique features.

Product Description

The MXR Reverb delivers six distinct high-end reverb styles, each exquisitely crafted and tuned by the award-winning MXR design team. It all comes in a standard-sized MXR box with a simple three-knob setup and a hi-fi analog dry path with a massive 20 volts of headroom thanks to Constant Headroom Technology™. Each reverb style is as richly detailed as any found in the highest-end rack units and plug-ins, and all you have to do to step through them is push the Tone knob.

The PLATE setting provides a shimmering smooth wash of space that’s a go-to choice from the studio recording world. SPRING sets a new standard for truly authentic sounding reverb without coiled metal—a perfect recreation of the classic amp-based effect, with the Tone control taking you from dark vintage amp spring, through classic jangle, to bright surfy splatter. EPIC is a unique combination of multiple interwoven analog-tone delay lines and complex modulation—perfect for solos from that more shaded part of the lunar landscape. MOD throws down a plate-flavored spaciousness with richly organic modulation in the feedback path. The ROOM style adds subtle body and projection to your guitar tone at shorter decay times while longer decay times yield rich organic space that doesn’t wash out. PAD closes out the line-up with a unique combination of sub-octave + octave-up with echoes + “shimmer” + synth/organ modulation + reverb.

Connect a Dunlop DVP series volume/expression pedal to the expression jack to toggle and blend between two different knob setting configurations. The Reverb includes 100% wet mode, stereo input and output capability, and true relay or trails bypass.

Product Features

  • Status LED
  • Bypass foot-switch
  • 100% Analog Dry Path
  • Digital reverb with 6 modes
  • Internal Mono-stereo switch
  • Including power adapter
  • Power consumption: 240 mA
  • 3 Bi-colour LEDs for display mode
  • 6.3 mm Stereo TRS input/output
  • 6.3 mm Expression pedal / CV input
  • Controller for Tone, Decay, and Mix
  • True Bypass and optional Trails bypass
  • Can be used as mono with normal instrument cables

Pros & Cons


  • High-quality build
  • Priced affordably
  • Extremely reputable
  • Positive consumer reviews
  • Value for money
  • Terrific sound quality


  • One High power draw
  • 2Poor Sound Quality
  • Awkward stereo setup
  • Two limited Selection Of Effects
  • One could use some sample settings
  • One noisy without a ground isolated power supply

MXR Reverb Guitar Effects Pedal (M300) Demo

Our Verdict

Given its low price, the M300 doesn’t provide many advantages over its competitors, but its sound quality places it firmly on the top shelf of reverb pedals.

MXR’s Reverb is not always the most extreme, spaciest, radical, or hyper-accurate digital reverb. However, it may well share the title of most useful if you’re a gigging guitarist who needs to cover a wide range of moods and inhabit a variety of musical environments. It’s simple to use (though a little twitchy), straightforward, and has a wide range that allows for tremendous subtlety with a rapid twist.

Where to Buy

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

MXR Reverb Guitar Effects Pedal (M300)

as of May 21, 2024 9:14 pm

Pricing History

Price History for MXR Reverb Guitar Effects Pedal (M300)


Current Price $219.99 May 21, 2024
Highest Price $219.99 November 16, 2023
Lowest Price $219.99 November 16, 2023
Since November 16, 2023

Last price changes

$219.99 November 16, 2023

Last updated on May 21, 2024 9:14 pm

Buyers Guides This Product Is Featured In

Best Reverb Pedals

Best Reverb Pedals Under $200 (2022)

Additional information

Item Weight

1 pounds

Product Dimensions

5.75 x 2.5 x 4.75 inches

Country of Origin


Item model number


Is Discontinued By Manufacturer


Date First Available

May 1, 2016

Color Name


Material Type



20 Volts


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