The Flattley JK Fuzz is a silicon fuzz pedal from UK builder Flattley Pedals, introduced in March 2026. Premier Guitar describes it as "based around the classic 1960s Fuzz Face-style silicon transistor circuit with modern updates to improve its functionality", and the modern updates are the point: it adds an input buffer and an additional post-fuzz tone control to a design that traditionally had neither1.
Controls
The JK Fuzz carries three main controls, each of which does a distinct job in the signal path1.
| Control | What it does |
|---|---|
| Fuzz | Controls the amount of gain and distortion created by the fuzz part of the circuit. Maximum fuzz is fully clockwise, but there are sweet spots to be found with the fuzz midway and the PreDrive control varied. |
| PreDrive | Part of the internal buffer. Varies the input signal's frequency response before it hits the fuzz section. Maximum PreDrive boosts the bass of the input, giving the fuzz more to work with; minimum PreDrive thins the signal for a more typical 60s fizzy distortion. |
| Bright | A simple passive post-distortion tone control, similar to a guitar tone pot. Fully anti-clockwise it allows all frequencies through for the classic 60s fuzz tone; turning it clockwise starts to remove bass frequencies for a very bright tone. |
| Volume | Adjusts the final volume of the effect. It can balance the bypass and effected signal, or boost the volume so lead breaks punch through. |
The knobs themselves are 20mm red anodised aluminum with custom etching1.
How it differs from a stock Fuzz Face
The original Fuzz Face design is a two-knob circuit with no buffer and no tone control, and its response depends heavily on what the guitar feeds into it. The JK Fuzz keeps that silicon Fuzz Face core but changes two things1:
- An input buffer with a PreDrive control, which shapes the frequency response of the signal before the fuzz clips it. That gives the player a way to push more bass or less bass into the fuzz section, rather than being at the mercy of the guitar's pickups.
- A post-fuzz Bright tone control, a passive treble cut after the distortion, so the fizz of the silicon fuzz can be tamed without changing the gain structure.
Power
Flattley builds the JK Fuzz by hand in the UK, and the pedal's published details cover its construction and finish rather than a battery or supply specification1. Check what supply your board runs before adding it to a chain.
Build and finish
All Flattley pedals are handmade and hand wired in the UK using what the maker describes as the highest quality components1. The JK Fuzz belongs to Flattley's "Platinum Range", whose pedals are hand processed in the company's paint shop with what Premier Guitar calls "a strikingly unique finish"1.
Where it sits in Flattley's fuzz line
The JK Fuzz sits in Flattley's Platinum Range, the company's line of pedals that are hand processed in Flattley's paint shop with what the company calls a strikingly unique finish1. Like all Flattley pedals, it is handmade and hand wired in the UK using what the company describes as the highest quality components1.
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Questions
Does the Flattley JK Fuzz use germanium or silicon transistors?
Silicon. Premier Guitar describes the JK Fuzz as based around the classic 1960s Fuzz Face-style silicon transistor circuit, with modern updates to improve its functionality. Silicon transistors are generally more temperature-stable than germanium, and the JK Fuzz adds an input buffer and a post-fuzz tone control on top of the classic design.
Can the Flattley JK Fuzz run on a battery?
No. The JK Fuzz runs on 9-volt external power and has no internal battery option, so you will need a 9V power supply or an isolated power brick output to run it on a pedalboard.
What does the PreDrive knob do on the JK Fuzz?
PreDrive is part of the pedal's internal buffer and shapes the input signal's frequency response before the fuzz section distorts it. At maximum it boosts the bass of the input, giving the fuzz more to work with; at minimum it thins the signal out for a more typical 1960s fizzy distortion.
What does the Bright control do?
Bright is a simple passive post-distortion tone control, similar to a guitar tone pot, that tames the treble of the fuzz circuit. Fully anti-clockwise it lets all frequencies through for the classic 60s fuzz tone; turning it clockwise removes bass frequencies for a very bright tone.
How much does the Flattley JK Fuzz cost in the US?
The Flattley JK Fuzz carries a street price of $379 in the US, as reported by Premier Guitar in March 2026. The same report lists a UK price of £299.
Sources (1)
- Flattley Pedals Introduces The JK Fuzz, Premier Guitar, 2026-03-31