The JAM Pedals "IT" Fuzz Phrase Si is a silicon fuzz pedal, the silicon-transistor version of the Greek maker's Fuzz Phrase design. Where the original Fuzz Phrase was a germanium pedal, the Si uses BC107 silicon transistors, which JAM Pedals says it settled on after testing various silicon types and fine-tuning the circuit to them1. It is a compact pedal, listed at £294.00 GBP on the maker's product page as of October 20261.
Controls
The Fuzz Phrase Si keeps its control layout simple, with two knobs on the surface and one trimmer inside:
| Control | What it does |
|---|---|
| Gain | Sets the amount of gain. |
| Level | Adjusts the output volume, while also allowing for versatile tonal shaping. |
| Internal Trimmer | Sets transistor bias, factory-set at 4.5V. |
The bias trimmer is the detail an experienced player will notice: because the circuit is tuned around its BC107s, the factory 4.5V bias point is part of how JAM Pedals voices the pedal, and it is set before the pedal leaves the workshop1.
Power and practicalities
The pedal runs on a 9V battery or a 9V DC adaptor with a tip-negative plug, and JAM Pedals lists power consumption at 3 mA1. That low draw means it can share a standard daisy-chained or isolated supply without trouble. JAM Pedals also offers a 30-day money-back guarantee, refunding no questions asked within 30 days of receiving the product1.
Custom artwork versions
The Fuzz Phrase Si is sold in a series of limited custom artwork editions. JAM Pedals describes every limited artwork pedal as a one-of-a-kind hand-painted piece, and notes that the pedal a buyer receives will differ in detail from the pictured example1. The named versions are:
- "Achenbach" Fuzz Phrase Si
- "Bad TV" Fuzz Phrase Si
- "Black Data" Fuzz Phrase Si
- "Luminous" Fuzz Phrase Si
- "Mandala" Fuzz Phrase Si
- "Relic" Fuzz Phrase Si
- "Shards" Fuzz Phrase Si
Because each custom artwork pedal is hand painted as a one-of-a-kind piece, the artwork on the pedal shipped will differ in detail from the product photos1.
JAM Pedals lists Bill Frisell among the artists using this pedal1.
Where it sits in JAM Pedals' fuzz range
The Fuzz Phrase Si is the silicon branch of a family that also includes the germanium Fuzz Phrase and the Black Fuzz Phrase LTD. The maker's wider fuzz line includes the Eureka!, the Red Muck and the Black Muck, all covered on the Fuzz Pedals type page.
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Questions
Does the JAM Pedals Fuzz Phrase Si have true bypass?
Yes. JAM Pedals lists the Fuzz Phrase Si as true bypass, so when the pedal is off, your guitar's signal passes through without the fuzz circuit loading it. That matters on a pedalboard where fuzz pedals in particular can interact with the input of the amp or other pedals when left in the chain.
How much current does the Fuzz Phrase Si draw?
JAM Pedals lists power consumption at 3 mA. The pedal runs on a 9V battery or a 9V DC adaptor with a tip-negative plug. A draw of 3 mA is low enough that it sits comfortably on a shared power supply with other low-draw pedals.
What does the internal trimmer do on the Fuzz Phrase Si?
The internal trimmer sets the transistor bias and is factory-set at 4.5V. Because the circuit is tuned around its BC107 silicon transistors, the bias point shapes how the fuzz behaves, so most players can leave the trimmer where JAM Pedals set it.
Which custom artwork versions of the Fuzz Phrase Si exist?
JAM Pedals lists the Fuzz Phrase Si in custom artwork versions named Achenbach, Bad TV, Black Data, Luminous, Mandala, Relic and Shards. Each limited artwork pedal is described by the maker as a one-of-a-kind hand-painted piece, so the pedal a buyer receives differs in detail from the pictured example.
Sources (1)
- “IT” Fuzz Phrase Si, JAM Pedals (jampedals.com)
