Electro-Harmonix · Fuzz

Big Muff Pi

9V · 3 mA · maker

Electro-Harmonix Big Muff Pi power requirements

9V DC · centre negative · draws 3mA · needs a supply of at least 25mA
the voltage it ships for · also runs on a 9V battery · from the maker
“The Big Muff Pi is powered from a 9V battery or you can use an optional 9VDC AC Adapter capable of delivering at least 25mA to the black power jack on the rear of the unit. … The AC Adapter must have a center negative plug that fits a 2.1mm center pin. … The Big Muff has a current draw of approximately 3mA at 9VDC.” source
Checked 2026-10-13
9.6V DC · centre negative · draws 3mA
from the maker
“Power Supply 9V battery included (optional 9.6VDC-100mA power adapter not included) … Current Draw 3mA” source
Checked 2026-10-13

139.7 × 174.75 × 74.93 mm (5.50 × 6.88 × 2.95 in)

Width × depth × height, from the manufacturer.

Each has an output that can power it, checked against its published figure. Plan the whole board to see what runs everything.