DIY Pedal Kits and Mods

Building your own guitar effect used to mean tracking down a schematic, sourcing every resistor and capacitor, and drilling your own enclosure. A DIY pedal kit removes most of that work: the maker supplies the parts, the circuit board and, in most cases, a pre-drilled enclosure, and you assemble it at home. A pedal mod is the other half of the hobby: instead of building a new effect, you open up a pedal you already own and change its circuit, usually with a kit of replacement components and instructions.

MOD Kits DIY, one of the best known names in the category, describes its kits as being "designed to give novice and experienced musicians the opportunity to build or modify their own amps, effects pedals and guitars"¹. That range matters, because the difficulty of a kit varies enormously, from screwdriver-only solderless builds to full circuit assembly that demands component identification and soldering skill.

What DIY pedal kits and mods are

A DIY pedal kit is a package of parts for one specific effect. MOD Kits DIY's kits, for example, cover distortion, reverb, fuzz and filter effects: the Aggressor high-gain distortion pedal kit², the Verb Deluxe reverb kit³, and the Erratic Clutch Deluxe fuzz and divider kit⁴. The company's Tea Philter is a do-it-yourself pedal kit for a filter effect⁵. Across the MOD Kits range, "all effect pedals and amplifiers come with a pre-drilled enclosure and all necessary parts are included"², so the builder is not machining metal or hunting for capacitors.

A mod kit works the other way around. Fromel Electronics' Boss MT-2 Metal Zone mod kit is a set of parts and instructions for upgrading the circuit of a Boss MT-2 that you supply yourself; Fromel states plainly that it is "a kit to modify your own pedal, no pedal included"⁶. Where a kit ends with a pedal that did not exist before, a mod ends with your existing pedal sounding different.

Both approaches sit inside the wider world of DIY effects, which also includes bare circuit board projects. GuitarPCB, for instance, sells DIY guitar pedal circuit boards, kits and parts, and points out that builders get "help from the circuit designers themselves"⁷, a level of support that a kit from a larger company may not match.

Kits for novice and experienced builders

Kits are not all pitched at the same builder, and makers are usually explicit about who a kit is for.

MAS Effects' Ultimate Beginner Pedal Kit is a soldering kit the company says is "meticulously designed to be easy for beginners, with loads of support and guidance"⁸, which makes it a common starting point. Jeds Peds, a UK maker of DIY guitar effects pedal kits and components¹², positions its Rusty Driver as a step up: a versatile pedal "suited for builders with a just above beginner level of knowledge"⁹. Its COT Fifty is billed as a simple, single-control, straightforward build¹¹.

Anasounds frames its FX Teacher series as a learning tool as much as a product: the Tape Preamp kit "will allow you to assemble and customize a legendary effect yourself, while learning the basics of electronics"¹⁰. The company also notes the practical incentive: its DIY kits are cheaper than the assembled pedal "but the sound quality remains the same"¹³, since the buyer is doing the assembly labor themselves. MI Audio made the same pitch for its MI DIY Dual Drive kit¹⁴.

For experienced builders, some makers sell partial kits. MAS Effects' Mimir's Well partial kit helps you build the Mimir's Well guitar pedal and is aimed at builders who want more control over the process than a complete kit allows¹⁵. And not every DIY project is a pedal at all: MAS Effects also sells a DIY Pedal Tower, a kit for prototyping and testing guitar pedals, aimed at builders who want to experiment with circuits before committing them to an enclosure¹⁶.

Do you need to solder?

For most traditional kits, yes. Jeds Peds is blunt about it across its range, from the Eee Peee to the Maybe bABY, Casper, Wild Boar and beyond: "You will have to identify components, calculate resistor codes and be able to solder them into place"¹⁷. That is three skills in one sentence: recognizing parts, decoding the color bands on resistors, and making solder joints. GuitarPCB publishes a beginner's guide to components to help with exactly the first two of those⁷.

MOD Kits DIY's Persuader Deluxe, a vacuum tube overdrive pedal kit¹⁸, keeps the requirement simple: "All you need to provide are hand tools, a soldering iron and solder"¹⁸. Everything else, including the pre-drilled enclosure, comes in the box.

Solderless kits

If soldering is the barrier, a growing set of kits removes it entirely:

• One Control's LWP Series Jubilee Red is a solder-free kit for an Amplifier In A Box (AIAB) pedal, assembling "with just a Phillips screwdriver and the included tools"¹⁹
• One Control's LWP Series Purple Humper kit recreates the BJFE Purple Humper "with no soldering required, just your Phillips screwdriver"²⁰
• Korg's OD-S overdrive kit promises "no soldering required"²¹
• JHS Pedals' NOTADÜMBLË is a solderless DIY kit pedal with an overdrive side and a clean side²²
• JHS' earlier NOTAKLÖN, released in 2023, is a solderless DIY kit featuring the Shamrock mod²³

The JHS kits show how far the solderless format has come: the NOTADÜMBLË contains what JHS calls "two of the most coveted sounds from the Dumble universe" in a build you assemble without an iron²². For a first-time builder who wants a working pedal at the end of an afternoon, these are the least intimidating entry points in the category.

What tools you need

The tool list depends on which kind of kit you buy:

• Soldered kits: hand tools, a soldering iron and solder, which you provide yourself²⁴²⁵²; the kit includes the pre-drilled enclosure and all parts²
• Solderless kits: a Phillips screwdriver, plus whatever tools the maker includes in the box¹⁹
• Prototyping: a testing rig such as the MAS Effects DIY Pedal Tower, sold as its own kit for building and customizing your pedal testing setup¹⁶

Beyond tools, the skills side of a soldered build is component identification and reading resistor color codes, which is why Jeds Peds lists them alongside soldering as requirements¹⁷, and why GuitarPCB publishes a components guide for beginners¹⁷¹².

Building or modifying amps, pedals and guitars

The DIY category is wider than pedals alone. MOD Kits DIY's stated purpose covers amps and guitars as well as effects¹, and its range has included vacuum tube designs like the Persuader Deluxe overdrive kit²⁵¹²⁶ and the Wave analog tube-driven spring reverb²⁵. Jeds Peds' Mon The is a boutique-style two-in-one pedal kit²⁷, and its 1590a R.A.T kit lets you build a pedalboard-friendly sized RAT distortion yourself²⁷²⁸.

Mods, meanwhile, are not limited to distortion pedals. Fromel's MT-2 kit reworks one of the most modified pedals ever made, the Boss Metal Zone⁶. And the two worlds overlap: JHS' NOTAKLÖN grew out of a mod, the Shamrock mod, that became a solderless kit in 2023²³. A builder who starts with kits often ends up modding, and vice versa.

Where kits fit on a pedalboard

A pedal you built yourself is, electrically, just a pedal. Once it works, it goes into your signal chain like any factory-built effect, needs the same powering as its circuit demands, and takes up a spot on your pedalboard like anything else. A DIY overdrive, fuzz or reverb is not a compromise version of the real thing: Anasounds' position is that the kit version sounds the same as the assembled one, only cheaper because you did the work¹³.

The difference is responsibility. If a factory pedal fails, you send it back. If your kit build fails, you debug it, which is why makers like MAS Effects emphasize support for beginners⁸, and why a multimeter and a testing rig like the DIY Pedal Tower exist for builders who want to check a circuit before boxing it¹⁶.

Pedals on this page

Boss MT-2 Metal Zone

Boss · Distortion

$150 list price

Anasounds Tape Preamp electronic kit

Anasounds · Preamp

MI Audio MI DIY Dual Drive Kit

MI Audio · Overdrive

$129 list price

MOD Kits Persuader Deluxe

Mod Kits · Overdrive

One Control LWP Series Purple Humper Solder Free Pedal Kit

One Control · Boost

$89.99 list price

JHS Notadümblë

JHS Pedals · Overdrive

$119 list price

Boss Metal Zone

Boss · Distortion

JHS Notaklön

JHS Pedals · Overdrive

$99 list price

Questions