A recording engineer, a battery cover and a guitar shop.

ZVEX Effects — written Z.Vex for much of its history and ZVEX on its website today — is the pedal company of Zachary Vex, based in Minneapolis, Minnesota. Its website says the company has been “at it since 1995,” and Vex told MusicRadar in 2017 that “Z.Vex started in June 1995.” English Wikipedia’s infobox gives 1994, the year in which Vex says he built his first designs; we give 1995 as the company’s own date and note the difference.

Vex came to pedals from the studio. Guitar World described him in 2020 as “a sound engineer,” and in an interview conducted in 2022 and published by the Australian magazine Mixdown in December 2024, he said he stopped working as a recording engineer in August 1994. That year, he told Mixdown, he found a Shin-Ei Apollo, a 1960s wah-fuzz, with its schematic printed on the battery cover. He built one, found it too quiet, added a booster and a tone switch, and called the result the Octane, an octave-up fuzz — by his account to MusicRadar, the first pedal he shipped.

Its first customer was a shop. Guitar World names it as Willie’s American Guitars in Minneapolis, whose owner, Nate Westgor, bought the first Octanes without hearing them; in Vex’s telling to Mixdown, Westgor simply said, “I’ll take three.” When local demand for the Octane ran out, the shop owner told him to design another pedal. Vex says he went home, stayed up all night and built the Fuzz Factory.

Five knobs nobody could name.

The Fuzz Factory is the pedal the company is known for. Vex told Guitar World in 2020 that he started with a bin of germanium transistors from a surplus store, bought for “a dime apiece,” meaning to build a fuzz in the manner of the Fuzz Face. When they gave him almost no gain, he added a booster “a little like an Electro-Harmonix LPB-1,” and the circuit “just went haywire.” He swapped fixed resistors for knobs to tame it, and friends persuaded him to keep them. The result had five controls — volume, gate, comp, drive and stab — and the shop owner, Vex told Mixdown, warned that “nobody’s gonna want five knobs.” The name, he says, came to him while he was painting the box.

Reviewers date its arrival to 1995: Premier Guitar wrote in 2013 that it “hit the scene in the winter of 1995.” Guitar World says it became Vex’s first major hit after a review in Guitar Player by the columnist Joe Gore. In 2019 MusicRadar called the company “perhaps the original weirdo boutique pedal maker,” with a reputation it traced “almost entirely” to this pedal, and noted that Matt Bellamy of Muse used it on Origin of Symmetry and had several built into guitars. Vex told Mixdown it is still the company’s best-selling pedal; in 2017 he told MusicRadar the best seller was “usually the Fuzz Factory or the Box Of Rock.”

Variants followed: the Fat Fuzz Factory, reviewed by Premier Guitar in 2013, with a switch that extends its low end, and the Fuzz Factory 7, which the company says adds a nine-position rotary switch and a passive tone control. In 2020 ZVEX and the Minnesota maker Chase Bliss released the Bliss Factory, a digitally controlled version, in a run of 1,000 sold through Reverb, Guitar World reported. The wider range includes the Woolly Mammoth, Box of Rock and Super Hard On, and the Probe pedals, which, the company’s website explained in 2001, generate a small “bubble” of radio-frequency energy above a copper plate and react as a hand or foot approaches. Vex has claimed firsts, telling MusicRadar he was “the first guy to do sequence pedals” and the first to make an analogue looper, the Lo-Fi Loop Junky; we give those as his claims.

Design and documentation.

Guitar effects pedals have supported a long line of specialist American makers, from companies founded in the 1970s to one-person workshops that grew into brands. All seven makers in this group are based in the United States.

The oldest is MXR, co-founded in Rochester, New York, in 1972 by Keith Barr and Terry Sherwood, according to English Wikipedia; Jim Dunlop acquired the brand in 1987, and his company, Dunlop Manufacturing, is based in Benicia, California. Fulltone, founded by Mike Fuller in California in 1991, closed its Culver City workshop in 2022 and relaunched in 2024 with the pedal maker Jackson Audio handling manufacturing and distribution, Guitar.com reported; its website now gives an address in Keller, Texas.

Xotic says it began in 1996 in a garage in California’s San Fernando Valley, that its brand has been owned since 2000 by Prosound Communications, and that it now works from Van Nuys. Catalinbread says it began in 2003 on Nic Harris’s kitchen table and has been in Portland, Oregon, since 2006.

Death By Audio was founded in 2002 by Oliver Ackermann in a Brooklyn warehouse, according to English Wikipedia, and it says it now hand-makes its pedals in a warehouse in Queens. Wampler Pedals, which English Wikipedia places in Martinsville, Indiana, was founded by Brian Wampler in 2007. ZVEX, Zachary Vex’s company, is based in Minneapolis.

Much of what is said about where these pedals are made comes from the companies themselves.

This guide sets out what can be checked about each brand — who founded it, who owns it, and what it says about where its products are made — and marks clearly what rests only on the company’s own word.

Painted by hand, because silk screens cost too much.

The look began as a saving. Vex told Mixdown that when he started, “every single pedal manufacturer was using a silk screen, and I couldn’t afford it,” so his then-girlfriend, a painter, decorated the boxes for “the first year, year and a half,” in a paint booth he built for her. The work later passed to staff artists: Mixdown reported in 2016 that a run of 25 twentieth-anniversary Fuzz Factories was hand-painted by “longtime ZVEX artist Lisa McGrath,” and in 2022 Vex said McGrath had for some years done “every bit of art on ZVEX.” The company’s custom service offers swirl painting and gold leaf, and its website has long warned that, because the pedals are hand-painted, colours and designs may vary.

A cheaper line existed by 2006, when the website described Vexter pedals as “hand silk-screened instead of hand-painted,” identical in construction and sold at “a somewhat reduced price” — made, it joked, “in small batches by umm, elves.” Today it says Vexters carry UV-printed art and that “the parts inside are identical to the hand painted model.” The company’s pages we read do not say where Vexters are built. Guitar World, reviewing a Vexter Fuzz Factory in September 2026, reported that it “is assembled in Taiwan,” while describing most ZVEX pedals as hand-painted, hand-assembled and made in small batches in Minneapolis. The company also sells a “U.S.” or “USA” Vexter, which its website described in 2019 as “made in America.” Its contact page gives a Minneapolis post-office box and a loading dock in neighbouring St. Louis Park. Wikipedia lists the company as private, and we found no record of an outside owner.

For a design guide, ZVEX shows how a workaround — painting by hand because printing cost too much — became the brand itself, with a printed line beside it. Compare Chase Bliss, its partner on the Bliss Factory, and Electro-Harmonix, whose LPB-1 booster Vex has compared to the front of the Fuzz Factory. For this guide we use a violet, a paint orange and a copper with a sans, an unofficial interpretation; no product or logo is reproduced.

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