The ThorpyFX SixZero Trem-Fuzz is a pedal that combines two effects in one enclosure: a silicon fuzz and a tremolo. It was built with UK retailer Andertons as a SixZero anniversary pedal, first appearing as a limited Sparkle Blue edition restricted to 200 pedals, and later going on general release in a Silver Sparkle edition1. For players browsing fuzz pedals, it sits in the same family as ThorpyFX's other fuzz designs such as the Fallout Cloud and the Field Marshal, while adding a built-in tremolo that most fuzzes do not carry.
Two editions, one circuit
The pedal exists in two versions. The Sparkle Blue SixZero Anniversary Trem-Fuzz was a limited run of 200 pedals made with Andertons. On January 14, 2025, it went on general release in a Silver Sparkle edition. Guitar Pedal X reports that the two editions have identical internals, with the only difference being the color of the enclosure, and that the price remained the same between them1.
The fuzz and the tremolo
The fuzz side is silicon based, and Guitar Pedal X's Stefan Karlsson found it close in character to an early fuzz classic1:
"the Silicon Fuzz is unerringly close in texture to a Germanium original Tone Bender, and the Tremolo has the most exquisite decay"
That comparison matters for players: germanium transistors are often prized for a softer, more textured fuzz response, and the reviewer's view is that this silicon circuit gets near that territory. The tremolo side carries its own story, as it was designed by Dan Coggins when he was just 14 years old1.
Controls and how they behave
The pedal carries Fuzz Attack and Level knobs, and Guitar Pedal X notes that both rise very quickly: 9 o'clock on the Attack is already plenty, as is around noon for Level1. In practice, that means small movements of the knobs make a large difference, so players may find their usable range sits low on the dials rather than near maximum.
Placement in the signal chain
The SixZero Trem-Fuzz has to be right at the front of your signal chain and cannot come after any sort of buffer, according to Guitar Pedal X1.
That requirement shapes how the pedal fits a rig. Any buffered pedal, switching system or wireless unit placed before it can interfere with how the fuzz responds, so it belongs directly after the guitar. Players who run a large board with buffered switching pedals will need to plan around this1.
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Questions
Where does the ThorpyFX SixZero Trem-Fuzz go in the signal chain?
It has to be right at the front of your signal chain and cannot come after any sort of buffer, according to Guitar Pedal X. That means placing it before any buffered pedals, wireless systems or pedalboard switching that might buffer the signal, so the fuzz sees the guitar's own signal first.
How much does the ThorpyFX SixZero Trem-Fuzz cost?
As of January 14, 2025, the price is $299 in the United States, with the same release also listed at £249 and €289 in other markets. Guitar Pedal X noted that the price remained the same when the Silver Sparkle general release edition followed the limited Sparkle Blue.
Who designed the tremolo in the SixZero Trem-Fuzz?
The tremolo side was designed by Dan Coggins when he was just 14 years old, according to Guitar Pedal X. Coggins is the designer behind ThorpyFX, and the tremolo circuit in this pedal dates back to that early design work.
What editions of the SixZero Trem-Fuzz exist?
There are two editions: the limited Sparkle Blue SixZero Anniversary Trem-Fuzz, previously restricted to 200 pedals, and the Silver Sparkle general release edition that followed. Guitar Pedal X reports the two editions have identical internals, with the only difference being the colour of the enclosure.
Does the SixZero Trem-Fuzz work after a buffered pedal?
No. Guitar Pedal X states that the pedal has to be right at the front of your signal chain and cannot come after any sort of buffer. Running it after a buffer or a buffered pedal can keep the fuzz from behaving as intended.
Sources (1)
- Guitar Pedal X, Guitar Pedal X, 2025-01-14
