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Average Price: $230

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$80

$181+

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Description

The Pro Co RAT is a legendary distortion effects pedal that has been a staple in the pedalboards of musicians across genres since its introduction. Known for its versatility and distinctive circuit design, the RAT offers a wide range of tones from warm, subtle overdrive to aggressive, fuzz-like distortion. It's a favorite among guitarists who appreciate its ability to cut through the mix with clarity and power. The pedal's straightforward three-knob layout—comprising Distortion, Filter, and Volume—allows for intuitive control, making it easy to dial in the perfect sound for any musical context.

The RAT's unique filter control is particularly noteworthy, offering a smooth sweep that can tame high frequencies or emphasize them for a more biting sound. This feature ensures that the RAT can adapt to different styles and setups, whether you're playing through a clean amp or adding grit to an already crunchy tone. Its rugged construction ensures durability, making it a reliable companion for both studio sessions and live performances. The RAT is also compatible with a wide range of power supplies, adding to its practicality for musicians on the go.

Key Features:

  • Legendary distortion pedal with a distinctive circuit design
  • Versatile tone range from overdrive to fuzz-like distortion
  • Intuitive three-knob layout: Distortion, Filter, and Volume
  • Unique filter control for precise tonal shaping
  • Rugged construction for reliable performance
  • Compatible with various power supplies for convenience

Product specs

Brand ProCo
Model Small Box RAT
Year 1984 - 1988
Made In United States
Categories Distortion Pedals
Pedal Format Standard

FAQs

What kind of distortion does the Pro Co RAT produce?

The Pro Co RAT is known for its versatile distortion, ranging from warm overdrive to aggressive fuzz-like tones, making it suitable for various music genres including rock, punk, and metal.

Does the Pro Co RAT work well with both single-coil and humbucker pickups?

Yes, the Pro Co RAT is designed to complement both single-coil and humbucker pickups, providing a rich and dynamic distortion tone regardless of the guitar's pickup configuration.

Is the Pro Co RAT pedal suitable for live performances?

The Pro Co RAT is highly regarded for live performances due to its robust build and ability to cut through the mix with its distinct distortion sound, making it a favorite among gigging musicians.

Can the Pro Co RAT be used with a bass guitar?

While primarily designed for electric guitar, the Pro Co RAT can also be used with a bass guitar, offering a unique, gritty distortion that many bassists find appealing.

What power supply does the Pro Co RAT require?

The Pro Co RAT typically requires a 9V DC power supply, but it can also run on a 9V battery, providing flexibility for different performance and practice settings.

How does the Pro Co RAT compare to other distortion pedals?

The Pro Co RAT is distinguished by its simple three-knob layout and its ability to produce a wide range of distortion tones, setting it apart from other pedals that may focus on more specific sound profiles.

Reverb

Reverb

1988 ProCo Rat 2: Andy's Vintage Picks | Reverb Tone Report

Video thumbnail for 1988 ProCo Rat 2: Andy's Vintage Picks | Reverb Tone Report by Reverb

1988 ProCo Rat 2: Andy's Vintage Picks | Reverb Tone Report

Reverb

Reverb

Video thumbnail for WILL IT CHUG? - RAT DISTORTION by Ola Englund

WILL IT CHUG? - RAT DISTORTION

Ola Englund

Ola Englund

Video thumbnail for History of the ProCo RAT Pedal and Myths Debunked by JHS Pedals

History of the ProCo RAT Pedal and Myths Debunked

JHS Pedals

JHS Pedals

Video thumbnail for ProCo RAT2 Distortion (Original) | Reverb Demo Video by Reverb

ProCo RAT2 Distortion (Original) | Reverb Demo Video

Reverb

Reverb

Video thumbnail for 4 Tips How You Can Use The ProCo Rat 2 Distortion by SRGuitar

4 Tips How You Can Use The ProCo Rat 2 Distortion

SRGuitar

SRGuitar

Video thumbnail for Vintage ProCo Rat 86 vs Vintage Boss DS-1 Silver Screw Japan by shnobel

Vintage ProCo Rat 86 vs Vintage Boss DS-1 Silver Screw Japan

shnobel

shnobel

Video thumbnail for Boss DS-1 VS. ProCo Rat 2 - Guitar Pedal Sound Comparison by SRGuitar

Boss DS-1 VS. ProCo Rat 2 - Guitar Pedal Sound Comparison

SRGuitar

SRGuitar

Video thumbnail for 1986 Pro Co RAT vs FAT RAT by shnobel

1986 Pro Co RAT vs FAT RAT

shnobel

shnobel

Video thumbnail for Vintage Big Box Pro Co Rat 1983 vs Pro Co Rat 1986 by shnobel

Vintage Big Box Pro Co Rat 1983 vs Pro Co Rat 1986

shnobel

shnobel

Video thumbnail for Vintage Proco Rat 1984 White face by Space Chief

Vintage Proco Rat 1984 White face

Space Chief

Space Chief

Video thumbnail for Pro Co RAT 85 White Face Reissue vs 1986 RAT by shnobel

Pro Co RAT 85 White Face Reissue vs 1986 RAT

shnobel

shnobel

Video thumbnail for The Most Used Pedal In My Entire Collection: My '90s ProCo Rat 2 Distortion | Jay's Toolbox by JayLeonardJ

The Most Used Pedal In My Entire Collection: My '90s ProCo Rat 2 Distortion | Jay's Toolbox

JayLeonardJ

JayLeonardJ

Video thumbnail for Vintage 1986 ProCo Rat by shnobel

Vintage 1986 ProCo Rat

shnobel

shnobel

Video thumbnail for 1986 ProCo RAT vs 1985 ProCo RAT White Face by shnobel

1986 ProCo RAT vs 1985 ProCo RAT White Face

shnobel

shnobel

Video thumbnail for Early Pro Co RAT vs 86 RAT by shnobel

Early Pro Co RAT vs 86 RAT

shnobel

shnobel

Video thumbnail for ORIGINAL 1984 Pro Co Rat Whiteface Vintage Guitar Pedal by jerrywcbot

ORIGINAL 1984 Pro Co Rat Whiteface Vintage Guitar Pedal

jerrywcbot

jerrywcbot

Reviews

PROS

  • Vintage sound quality, suitable for bass and guitar

  • Clarity with ample gain and volume

  • Consistent sound across different versions

  • Versatile for various music genres and instruments beyond guitar

  • Distinctive, organic tone with adjustable saturation

  • Large tonal range without losing character

  • Enhances tube amp performance notably

  • Durable build, reliable over decades

  • Unique character allows cutting through mixes easily

  • Compatible with chorus and reverb for expanded soundscapes

CONS

  • Original versions preferred, suggesting variability in newer models

  • Non-standard power supply requires an adapter

  • Some units may sound shrill, fizzy, or thin at high settings

  • Can be too fizzy for some, less versatile for others

  • Gain control limited; becomes awkward past 50%

  • Feedback issues reported, with a very sensitive filter knob

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Pro Co RAT.

Use cases and applications

  • Users appreciate the Rat's suitability for 80s hard rock/metal and punk, noting its simple setup and compatibility with various guitars and amps.

    Source
  • It excels in alternative rock and indie settings, with users citing its effectiveness in emulating sounds similar to Weezer and early Blur.

    Source
  • The RAT is favored for alternative rock and 90s indie, offering a rhythm distortion well-suited for these genres.

    Source
  • The RAT pedal is praised for its versatility across genres, from jazz/funk/blues with an AC30 setup to doom metal with a Gibson SG tuned to B standard.

    Source
  • The RAT's suitability for modern metal is debated, but it excels in genres like doom and post-metal due to its fuzzy yet clear tone.

    Source

Mods and upgrades

  • Users recommend trying the Dead Air Feral +, which is based on the RAT and offers additional controls for high-end taming and pre-gain frequencies.

    Source
  • The Drunk Beaver Cold War BAT is recommended for those seeking a RAT clone with multiple clipping and tone options, praised for its versatility and durability.

    Source
  • Clipping a resistor on the Turbo Rat can reduce brightness, creating a more balanced sound profile.

    Source
  • Modding the RAT with a voltage starve using a 10KB pot and a diode selector for asymmetrical clipping and LED is recommended for a unique "glitchy and sputtery" sound.

    Source

Features and functionality

  • The RAT's filter knob offers a wide sweep, allowing users to adjust from low to high gain, which is especially beneficial for heavy styles.

    Source
  • The Turbo Rat variant is noted for its versatility and LED clipping, providing a distinct character compared to the standard Rat.

    Source
  • The RAT can be used as a treble booster with low gain and high output when paired with a dirty amp, offering a different tonal palette.

    Source

Comparisons

  • The RAT pairs well with Fender-voiced amps, and users often stack it with a BD-2W for a well-rounded tone.

    Source
  • The Mooer Black Secret is highlighted as a budget-friendly Rat alternative, offering both Rat and Turbo Rat circuits, praised for its quality and versatility.

    Source
  • While older RATs like the 90's version with the LM308 chip are favored by some, newer models are noted for their consistency in sound quality.

    Source

User experience

  • Owners report issues with the Rat's fit on pedalboards, suggesting customized velcro placement for better stability.

    Source
  • Users note the RAT's effectiveness for low tuning styles, highlighting its clarity and fuzziness, which suits genres like doom metal and post-metal well.

    Source

Value and pricing

  • The Mosky Black Rat and Donner Dark Mouse are recognized for delivering authentic Rat sounds at a low price point, making them attractive for budget-conscious buyers.

    Source

Critic Reviews

Pro Co Rat Distortion Pedal

guitarinteractivemagazine.com

The Pro Co RAT Distortion Pedal is celebrated for its versatile sound, from smooth overdrive to gritty fuzz, reminiscent of a retro vibe that legends like Hendrix would appreciate. Its reissue stays true to the coveted original 1985 model, including the crucial LM308 chip, a favorite among collectors. While the 85 reissue is pricier, it’s a faithful throwback for purists. However, the Turbo Rat emerges as a standout, offering fat, less hissy tones that steal the show. Ultimately, the RAT range provides consistent quality with subtle differences, catering to varied tonal preferences.

positive
Add

4.5 out of 5

Based on 33 Reviews and 245 Ratings

5 star
4 star
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1 star
lucas_pagnussat

Pedal muito bem construído, com knobs intuitivos, sonoridade incrível

Uso ele a um bom tempo, como minha distorção principal. Uso com o ganho quase sempre antes do meio dia, mas ele funciona bem em diferentes regulagens. É uma distorção "molhada", extremamente orgânica, incrível pra tocar sons como Smashing Pumpkins e Arctic Monkeys.

jimmarchi1

I love the rat

this is like the queen bee of buzzy distortion toys... it does a little of everything and it does it well. Sounds great through an AC30 too, which is a tough amp for most dirt boxes. Everyone should own a rat or something absed on the rat. I have this in a box of junk. It went in there when I had a long period where I didn't use many effects in line and now tis been replaced by the TC Nova Drive that ahs a rat in it. But I'll probably never get rid of the proco, I've had it forever. Everyone should buy one.

johnielopez

The Rat, whiteface, from Proco. Arguably the best distortion ever created.

I may be biased, but I have never needed to buy, or do research for that matter, for any distortion or overdrive, fuzz, etc. You can literally get any sound you need from a Rat. What I love about this pedal is using it along with the volume knob, at really low volumes it has a whole different character. As you turn it up, the character changes and becomes something more, but just as intriguing. I have had mine since 1987, I bought it from a friend for $40. I have never played any other distortion in my signal path and I played top 40, metal, rock, blues, funk, 80's, 90's etc, using this pedal for all kinds of effects. The filter knob, this is the key, when you play a room and the reverb is drowning you out, just turn this know until the frequency cuts through the hoopla, I cannot convey how great it is to have that ability and fix it in 5 seconds with no soundman debates, or having to turn your rig up and then you look like an a**hole. If you don't have a Proco Rat, a Whiteface, vintage or reissue, my preference, then stop reading and go get one if you want to have any integrity as a guitarist. If you kick this pedal on, and there are any guitarists in the audience, oh they will come to see what is making you sound like a beast! believe me, it will happen as it has to me countless times. Good luck in acquiring one!

marv_brown

Love my Whiteface!

jimmarchi1

"I may be biased" woulda been funnier if you were reviewing something with discrete transistors or a tube amp. Classic for a reason... I'm not sure that using an original spec rat gives a guitarist integrity, but they sure sound good, especially in a band context and they get on with a lot of different amps. Great for synths too.

traumaad

I Use this pedal to tastefully add some CHARGE to a Drums, Synth Leads and/or Synth Bass. If i want to get TUFF with my synths, especially bass i'll use some METAL DISTORTION like that "shitty" Joyo Metal pedal i use. I tell ya' -- for guitars, mehhhhhhhh

I Use this pedal to tastefully add some CHARGE to a Drums, Synth Leads and/or Synth Bass. Some extra saturation. On my guitar is drive it up and crank it. love Rat Pedals. However, If i want to get TUFF with my synths, go full distort. especially bass synth, i'll use some METAL DISTORTION like that "shitty" Joyo extreme metal pedal i have hahaha. I tell ya' thing kicks a lil ass with synths -- ok. lolol. for guitars, that joyo "Extreme" distortion is MEH!. Anyway on guitars if you rock This RAT, a proper guitar, and an amp head that goes to 11... shits going to scream. (and if you want to take it further a Maxon OD 808 infront of that Rat willl take you there, better rock that NS-2 while you're at it aswell baha)

G

This pedal is manly as fuck.

Great distortion, spongy organic tone with no hiss. Works well on solid states but better on tubes. Can be powered by 9, 12 and 18v. More juice means more distortion. After trying 13 or so distortion pedals (no exaggeration) I tired this pedal for the first time at my local music store (they are always sold out). Upon engaging this pedal while playing a verse from 'Hooks in you" by Iron Maiden, My hair grew 100%, My chest hair billowed from beneath my shirt, and I was able to sing 3 octaves higher. I took it home and hooked it up to my 7 string, and was able to chug out the chunkiest riffs I have ever played. BUY. THIS. PEDAL

jimmarchi1

this is a great review but it would've been funnier if you were a woman

ashrafimaduddin

RAT is all you need

Simply perfect. Love the versatility that you can get out from this pedal. Sweet mild overdriven/disorttion tone to sick ass fuzz! The only withdrawal about this pedal is a hit or miss. Tried bunch; some are very good and some are really bad. It can get too shrills, fizzy and thin at the top end. Nonetheless, easily favorite pedal off all time. Would recommend to check out Proco Rat 1985 original whiteface or reissue and Proco Rat 2 MIA (1990's). Else, go for Big Ear Woodcutter!

raphaelgunther

[deleted]

jimmarchi1

if you can find one the discontinued TC Nova Drive is a rat with 2 tone shapers coupled to a TS9 circuit and a clean blend. It has preset storage, receives midi program change data as well as continuous controller data for expression pedals to replace certain knob functions (not that I use that feature). You can use the 2 drive cicuits separately, in series or in parallel (which is really more useful than I expected). I will never go back to a regular Rat and I have owned many of them, even the really early version everyone goes bonkers for now.

raphaelgunther

Nice to know @jimmarchi1.

pariahrob

Does one job well

The Rat is one of those items that has been around for a long time. Many use it as a drive pedal but I prefer to use it slightly differently. For me it lives in front of the amp, with little to no drive. This just adds some hair and pushes the preamp tubes a little. I find it too fizzy as a drive pedal but as a dirty boost it's great.

craiganthem73

It gives you all you need

this pedal gives you the fuzz of Dave Gilmour, the hard grunge of Kurt Cobain and Dave Grohl, as well as the 80's distortion of Nuno Bettencourt. Easy to dial in tones, and there are so many. Mine has been stomped hard and still no problems 20 years later.

jimmarchi1

Also, to the best of my knowledge, the first op-amp/diode-to-ground distortion to incorporate a charge pump to double the traditional 9 volt rails of stomp boxes. THis idea has been borrowed in a number of high profile 'boutique' overdrives like the Klon Centaur and Sweet Honey Overdrive. A high(er) voltage Distortion+ with a big muff tone control that sounds nothing like the 70s designs it draws inspiration from that's built like a tank. What's not to like?

thelynchist

This pedal doesn't like boosters

Good old Lm308. This pedal has an interesting sound, it gives a very strong distortion almost close to fuzz.

Artist usage

Add artist
See how Kurt Cobain uses Pro Co RAT

Kurt Cobain

Singer, Guitarist

Nirvana

...
Verified via Photo

This guitar effects pedal was used for the recording of "Nevermind”.

In this photo, the pedal clearly has the same knobs of that of the first version of the Pro Co Rat, as seen by the thick white lines which differ from the second one, proving that this is the correct model.

See how Dave Grohl uses Pro Co RAT

Dave Grohl

Guitarist, Drummer

Nirvana

...
Verified via Fooarchive

"Sometimes we'd double a track using an old Pro Co Rat, and then hard-pan the parts so that a super-distorted guitar was in the left channel and a grindy guitar was in the right. Then we'd sprinkle in lots of clean guitar overdubs," explains Foo Fighters guitarist Dave Grohl about the Pro Co RAT Distortion Pedal.

See how James Hetfield uses Pro Co RAT

James Hetfield

Singer, Guitarist

Metallica

...
Verified via Groundguitar

Used on “Kill ’em All” in combination with a modified Marshall.

See how Matthew Bellamy uses Pro Co RAT

Matthew Bellamy

Singer, Guitarist

Muse

...
Verified via Premier Guitar

Listed under effects used recording the album Will Of The People at the bottom of the article

See how Mick Thomson uses Pro Co RAT

Mick Thomson

Guitarist

Slipknot

...
Verified via MusicRadar

In this MusicRadar article, Mick Thomson shows off some of his pedals. One of them is a Pro Co RAT distortion pedal, although he doesn’t actually say anything about how it was/is used.

See how Krist Novoselic uses Pro Co RAT

Krist Novoselic

Bassist, Keyboardist

Nirvana

...
Verified via YouTube

"Krist's distortion pedal of choice." as mentioned by Earnest Bailey, NIRVANA's guitar tech, and heard on many recordings including In Bloom

See how Frank Iero uses Pro Co RAT

Frank Iero

Singer, Guitarist

My Chemical Romance

...
Verified via Photo

In a user-uploaded photo on Redditmedia, Frank Iero's Pro Co RAT distortion pedal is visible between a Swollen Pickle and a Blues Driver. Although the image is small, it clearly shows his setup.

See how Joe Perry uses Pro Co RAT

Joe Perry

Guitarist

Hollywood Vampires

...
Verified

Used for Done with Mirrors, as stated in this May 1986 Guitar for the Practicing Musician interview.

GUITAR: What's everyone's favorite new sound or toy?

[...]

JOE: [...] My newest trick is to go back to the basics. I started playing my '57 Strat, Tele and Firebird.

BRAD: He went and dug out all his old original pickups and put them back in.

JOE: The only major change I made was using a Boogie top. I used to have big effects racks and graphic EQs. I chucked it all and went direct except for a Pro Co Rat Pedal. For the tremolo bar stuff I used a Charvel that Brad had, which sounded good in the studio.

See how Pat Smear uses Pro Co RAT

Pat Smear

Guitarist

Nirvana

...
Verified via Photo

In a user-uploaded photo, Pat Smear's pedalboard with the Foo Fighters prominently features a ProCo RAT pedal. It's unclear if this is a RAT 2 or the original Small Box RAT, similar to what he used during his time with Nirvana.

See how Rivers Cuomo uses Pro Co RAT

Rivers Cuomo

Singer, Guitarist

Weezer

...
Verified via MusicRadar

“Sometimes you put on distortion on top of something already distorted and it’s like a math problem, everything cancels each other out, you know? This gives a big boost and I can always hear the notes really well. I’ll kick it in for any lead sounds.”

See how Omar Rodríguez-López uses Pro Co RAT

Omar Rodríguez-López

Guitarist, Bassist

At the Drive-In

...
Verified via YouTube

In the YouTube video titled "The Mars Volta - At The Drive In - Omar Rodriguez Lopez - Gear Rundown - Guitars, Amps, Pedals" by Future Sound Music, it is confirmed that Omar Rodríguez-López uses the Pro Co RAT distortion pedal at approximately 2:03.

See how Robert Fripp uses Pro Co RAT

Robert Fripp

Guitarist, Keyboardist

King Crimson

...
Verified via Guitarcraftguitars

Pedals: Big Muff (Russian), Pro Co The Rat, Fender Blender (vintage), Robotalk (envelope follower/filter), MXR Dynacomp & Dunlop Crybaby.

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 Pro Co RAT, it is most commonly used with the following gear.

Community setups

Show yours
grumbl35

grumbl35

Gear IQ 157

jjq

jjq

Gear IQ 67

lars_gustav_larsson

lars_gustav_larsson

Gear IQ 3526

D

dave_porter

Gear IQ 83

lars_gustav_larsson

lars_gustav_larsson

Gear IQ 3526

tylerrosier

tylerrosier

Gear IQ 322

mattlefevers

mattlefevers

Gear IQ 284

shahar_levy

shahar_levy

Gear IQ 194

lars_gustav_larsson

lars_gustav_larsson

Gear IQ 3526

smo

smo

Gear IQ 171

skytimesfive

skytimesfive

Gear IQ 603

nathaniel_danger_fitzgerald

nathaniel_danger_fitzgerald

Gear IQ 145

sleepgaze

sleepgaze

Gear IQ 129

craig_st_clair

craig_st_clair

Gear IQ 173

ivan_soliton

ivan_soliton

Gear IQ 214

grandaddyjeff

grandaddyjeff

Gear IQ 186

dumpsterbassist

dumpsterbassist

Gear IQ 2252

star7706

star7706

Gear IQ 153

h1grave

h1grave

Gear IQ 649

kcorrigan7

kcorrigan7

Gear IQ 216

yapoomarket

yapoomarket

Gear IQ 164

arion_xenos

arion_xenos

Gear IQ 292

pippo83

pippo83

Gear IQ 98

43 alternative and related items for Pro Co RAT, curated by the Equipboard community.

Pro Co RAT 2

$79.00 - $108.00

newer similar sound cheaper alternative

The current standard RAT pedal, the RAT 2 uses a more readily available chip, and features an on/off LED in the "A".

Landgraff MO’D

 

Vintage or Discontinued mod

Handmade by John Landgraff, this was a modified ProCo Rat circuit.

Black Mass 1312 Distortion v3

 

high-end alternative

The 1312 Distortion uses the Rat distortion circuit but adds 8 different clipping options on a rotary switch: • Vintage Germanium • Red LEDs • Silicon • Asymmetrical MOSFET • Silicon/Ge • MOSFET • Asymmetrical Silicon • Quad Silicon

Pro Co Limited Edition Reissue '85 Whiteface RAT

$350.00

Vintage or Discontinued limited edition newer

A reissue of the Whiteface RAT, that uses the vintage correct LM308 chip.

Little Bear R.Attack RT-2

$66.24

similar sound cheaper alternative

It is purported to offer 3 rat versions in one pedal

Caroline Guitar Company Wave Cannon MKI

$249.00

Vintage or Discontinued similar sound

According to Josh Scott of JHS, the Wave Cannon is based on the Rat: https://www.jhspedals.info/packrat-release-mobile

A few years after starting JHS, I purchased a fascinating distortion pedal from a brand new company out of South Carolina. I remember jumping on the phone and geeking out with the designer and head of the company Philippe Herndon. We talked about the circuit, his love for RATs and his clever take on the circuit. That pedal was called the Wave Cannon and when I started the PackRat project, it was obvious that Philippe was the friend I should bring along for the ride.

The claim is supported by Herndon's own writing on the Caroline Guitar Company website:

October 22, 2010 "Technical links, thanks, and praise.": https://carolineguitar.com/technical-links-thanks-and-praise/

The Wave Cannon™ would not exist at all if not for the trailblazing op-amp fuzzes and distortions of the 1970s and ’80s that inspired it: the DOD Overdrive 250, MXR Distortion +, Proco Rat, Ibanez/Maxon SD-9 Sonic Distortion, and Boss DS-1 among others. Our product is not affiliated with any of these companies or makers. In my mind, the people responsible for these pedals discovered America, and our first product represents my attempt to find a home on that frontier.

December 21, 2011, "Wave Cannon named to Guitar World’s Top Ten Pedals of the Year": https://carolineguitar.com/wave-cannon-named-to-guitar-worlds-top-ten-pedals-of-the-year/

I only wish to offer this caveat: in my mind, the Wave Cannon is derivative in that it is my tribute to my favorite op-amp distortions of the 1970s and ’80s, the special kind of rumble that these circuits can create, and what I wanted for myself. I’ve mentioned some of these before – Ibanez Sonic Distortions and Fat Cats, Proco Rats, grey DOD 250s, the first block logo MXR Distortion+ I owned – all of these pedals very much informed what we went for with Wave Cannon.

September 27, 2015, "So what is the difference between…": https://carolineguitar.com/so-what-is-the-difference-between/

Wave Cannon 1/Cannonball: This was the pedal that got us started in 2010, and it’s based on a classic 1970s DOD OD-250/ Proco Rat style frame: single op-amp pushed really hard, hard clipping to ground, and a discrete transistor buffer between the tone and volume control. We incorporated a variation of a known mod to these kinds of pedals courtesy of Phillip Ruetz that we called the Shape control (named that way because I once saw the actual shape of some treble frequencies I played go from square to sine as we changed the values), and added the feedback loop we called the Havoc control after I did it by accident on the breadboard. If I had known that we’d end up making over 900 of these pedals, I would have done things very differently. Let’s just say it’s not going to win any design awards. It was laid out pretty poorly and they are an inefficient pain in the butt to make. My friend Wes Kuhnley of Resonant Amps once asked me why we used a single op-amp instead of a dual. My answer? When we started making these, I actually didn’t know how to implement a dual op-amp for its design.

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