MXR M104 Distortion+ Distortion Pedal

MXR's Distortion Plus pedal creates a whole mess of overdriven tones with just 2 knobs. Crank it from sweet breakup to gritty crunch to fuzzed-out insanity.

Your MXR M104 Distortion+ pedal fuels your signal with a guaranteed distorted wash, blending that classic overdrive sound with some serious super fuzz. This dynamic pedal gives you a solid range of distorted tones via its simple controls for output and distortion level. A bright red LED illuminates when your pedal is engaged, and a rugged and durable outer metal chassis keeps your pedal's circuitry and wiring isolated and secure stomp after stomp. This convenient pedal will quickly become a must-have in your signal chain, for those times when you want to kick things up a couple of notches.

Get the lowdown on the MXR Distortion + with this video from MXR:

Classic Distorted Tone and Over-the-top Fuzz

The M104 does a lovely job of crafting punchy, creamy, and fuzzy tones all from one single stomp. Whether you're looking for a piercing and screeching sound for wailing leads and solos, or something nice and crunchy for rhythmic chugs, you won't find yourself short on sonic options. This pedal is a do-it-all crossover of basic classic overdrive fuel and that over-the-top fuzz that simply can't be ignored. The inner circuitry of this baddie delivers germanium diode clipping, so your crunchy tones will have an appealing tube-like contour.

Simple, No-nonsense Control Layout

To craft the perfect combination of distorted tone with your signal is a simple two-control-knob layout. Your output control knob dials up the decibels, and the distortion control knob brings in the amount read more of dirty. Keep your distortion level at around 25 percent for some classic breakup, and crank this control up to about 75 percent to get some serious fuzz. Using this pedal in conjunction with your pedalboard will add a great spectrum of distortion, leaving the door wide open for some interesting tonal amalgamations.

Time-tested Secure Outer Chassis

Your signal is protected by a secure and rugged outer metal chassis that holds up with confidence stomp after stomp. A secure outer casing also keeps this pedal's inner circuitry and electronics protected from unwanted atmospheric elements like dirt, sweat, dust -- a reliable shield for the gigging musician on the road. An easy-to-see red LED light indicates when your pedal is engaged. Fire this baddie up and enliven your axe to new distorted levels!


- Distortion pedal
- Red LED light to designate engaged/disengaged setting
- One 1/4" input
- One 1/4" output
- Powered via 9 volt battery or Dunlop ECB-003 AC adapter -- sold separately
- Output and distortion level controls
- Equipped with germanium diode clipping to emulate tube-like crunch
- Durable and sleek looking outer metal chassis
- Super light at only 0.9 pounds
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Knobs: Output, Distortion

Dimensions: 4-1/4 x 2-1/4 x 1-1/4 in.

Weight: 0.9 lbs.

Color: Yellow
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 1 lbs
Shipping Dimensions: 6 x 5 x 3 in
Manufacturer Part Number (MPN): M104

For support or warranty questions, please contact the manufacturer:
Phone: 707-745-2722

MXR M104 Distortion+ Distortion Pedal

Controls can be set to produce low-volume, controllable distortion or increased to achieve a warm, tube overdrive sound. Set to maximum, its pronounced fuzztone combines with long sustain. Within the central areas of the Output and Distortion controls of the M104 are some soft, clipped distortions that sound truly authentic, especially with a splash of reverb.

Pushing the Distortion level up high produces some classic fuzz tones that are finding their way onto an increasing number of albums, in line with the current retro fascination. This distortion is an enjoyable alternative from L.A. saturation and thick, British crunch. The distortion can also be tamed by using it with a warm crunch/overdrive sound as a base for some hip Hendrix sounds, and also to emulate Randy Rhoads' favorite deployment of his Distortion+.


- Output and fuzz foot control knob
- LED on/off indicator
- Powered by the Dunlop ECB03 (earlier versions use ECB02) AC Adapter and/or 9 volt battery

Reviewers gave this product an overall rating of 5 out of 5 stars. (72 ratings)
Submitted November 20, 2022 by Gerry B in Sharon, TN

"Sounds great after 40+ years"

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
The MXR Distortion Plus has been my distortion pedal since I heard a dude demo one in a large music store in 1979. I was 13 and had been taking lessons 4 yrs. and had recently received a '73 Strat and Peavey Classic 50. The Strat & amp sounded good but I wanted a heavier sound like Schenker, Sabbath or Priest. When I heard that dude play Rock Bottom with a Strat thru a Roland JC with only a little yellow box in between, I knew I wanted that sound! As far as the new M104 sound, it's actually a more defined saturation that lies somewhere around 7/10 on the overdrive to extreme metal scale. My 79 model has a little dirtier sound with a little hum not found in the new models. Considering it was Randy Rhoads choice of distortion pedal has made many collectors pay serious bucks for 1st gen M104s. I've been using mine for 43yrs and it sounds exactly like it did when I got it home. If you're thinking about a new distortion pedal, you won't go wrong with a MXR Distortion Plus. And 40yrs from now you can leave a review, because your M104 will still be rockin

Musical Background:

Been playing guitar on and off 40 plus yrs

Musical Style:

Took Classical lessons from age 9 til 13 when I really got into Ritchie Blackmore, Michael Schenker, Uli Roth, Alex Lifeson, and
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