The BMF Effects Sisyphuzz Silicon Fuzz is a fuzz pedal built to deliver classic fuzz tones using silicon transistors selected for germanium-like qualities. BMF Effects states the goal plainly: "Great fuzz tones without temperature or biasing issues: that was the goal for the Sisyphuzz Silicon Fuzz pedal." Germanium fuzzes are known for reacting to heat and cold and for needing bias adjustment, so a silicon circuit voiced that way is aimed at players who want that character with less fuss1.
Transistor options
The Sisyphuzz is not a single fixed circuit. BMF Effects lists several transistor choices1:
- BC108
- BC109
- BC183
- Low Gain 2Nxxxx
The maker notes that "transistor and voicing options exist based on parts availability," so what is offered at any moment depends on which parts BMF can source, and buyers are invited to get in touch for details1. The transistors were "chosen because of their germanium-like qualities, making this pedal a great optio[n]" for players chasing that voicing in silicon1.
Power, bypass and practical details
The pedal runs on 9V DC through a DC jack and draws 2mA, a very light load on any supply1. Like all BMF Effects pedals, it uses true bypass switching1. Its footprint is 2.9 inches wide by 4.5 inches long (73.7mm x 114.3mm)1.
The Sisyphuzz was listed as sold out at BMF Effects as of 26 October 2026, with a stated lead time of 21 to 28 days when units are made to order1. The maker also notes that the pedal's color and/or graphics are subject to change1.
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Questions
What transistors can the BMF Effects Sisyphuzz use?
BMF Effects lists BC108, BC109, BC183 and Low Gain 2Nxxxx transistor options for the Sisyphuzz. The maker notes that transistor and voicing options exist based on parts availability, so which versions are on offer at a given time can vary, and buyers are invited to contact the maker for details on what is currently available.
Is the Sisyphuzz true bypass?
Yes. BMF Effects states that, as with all BMF Effects pedals, the Sisyphuzz Silicon Fuzz features true bypass switching and a DC jack for power.
How much current does the Sisyphuzz draw?
The Sisyphuzz draws 2mA according to BMF Effects, and operates on 9V DC. That low draw means it puts very little demand on a power supply.
What is the lead time on a BMF Effects Sisyphuzz?
BMF Effects lists a current lead time of 21 to 28 days for the Sisyphuzz, so units are built to order rather than shipped from stock.
Is the Sisyphuzz a germanium or silicon fuzz?
The Sisyphuzz is a silicon fuzz. Its transistors were chosen for their germanium-like qualities, which BMF Effects says makes it a good option for players who want that style of fuzz tone without the temperature or biasing issues associated with germanium.
Sources (1)
- Sisyphuzz Silicon Fuzz, BMF Effects