Function f(x) strives to make the highest quality guitar pedals possible but without overblown hype and pixie-dust marketing. From unique and innovative fuzz and drive boxes to filter, phaser, and tremolo (and coming soon: delay!), our mission is deliver exceptional products to inspire and empower guitar and bass players all over the world. If you have questions or comments about Function f(x) guitar effects pedals, please do not hesitate to contact us directly. We'd love to hear from you!

Product Lineup

VIEW ALL
Parallax Tremolo + Phaser

Parallax Tremolo + Phaser

The Parallax is a modulation mashup consisting of an optical op-amp-based tremolo with an OTA-based 5-stage phaser bolted on to the…
READ MORE
Gate Crasher Octave Fuzz

Gate Crasher Octave Fuzz

The Gate Crasher octave fuzz is a gnarly octave-up fuzz that produces controllable gated fuzz tones with over-the-top octave harmonics. Under…
READ MORE
The Cannon Dual Fuzz

The Cannon

The Cannon dual fuzz is a 2-in-1 mashup of a pair of classic fuzz circuits: the Tycobrahe Octavia and the AstroTone…
READ MORE
Clusterfuzz Jr.

Clusterfuzz Jr.

The Clusterfuzz Jr. is the smaller brother to our Clusterfuzz. It's the same circuit under the hood, with a few…
READ MORE
Accufunkture

Accufunkture Envelope Filter

The Accufunkture is an envelope-controlled filter effect (auto-wah). We started with the classic Mutron Micro V circuit and added the…
READ MORE
The Third Rail

The Third Rail Dual Overdrive

The Third Rail dual overdrive is our first foray into the overdrive realm. Our design objective was to create a…
READ MORE
Clusterfuzz

Clusterfuzz

Behold: the Clusterfuzz. A tweaker’s delight, the Clusterfuzz pedal is capable of delivering medium-gain overdrive up to raunchy square-wave fuzz…
READ MORE

Our Design Philosophy

As pedal geeks and DIY fanatics, we love combing through dusty boxes of old transistors, diodes, resistors, etc. There's nothing more satisfying than firing up a fuzz project made from 1960s parts and reveling in the greasy tone of Germanium transistors and diodes, or marveling at the aesthetics of wattage-overkill carbon composition resistors. But when it comes to products that we make for our customers, we stick to tried-and-true modern components with tight tolerances and consistent performance across a wide range of operating conditions. You can take your Clusterfuzz or Gate Crasher fuzz box from a cold studio directly to a hot outdoor venue and they will sound exactly the same. We value consistency and quality over mojo and unicorn tears. 

As far as circuit design goes, we do our best to be as original as possible (Clusterfuzz, Parallax, Gate Crasher, Clusterfuzz Jr.). The last thing the pedal world needs is another Tube Screamer clone pretending to have magical powers (with a price tag to match). In cases where we have recreated or largely appropriated a classic circuit (The Cannon and Accufunkture), the original circuit is called out and credited. We value transparency over hype and misinformation.