Electro-Harmonix · Fuzz

Bass Big Muff Pi 2

9V · 25 mA · maker

Electro-Harmonix Bass Big Muff Pi 2 power requirements

9V DC · centre negative · draws 25mA
the voltage it ships for · also runs on a 9V battery · from the maker
“An optional 9VDC, center-negative power supply may be connected to the power jack to provide power without a battery. The Bass Big Muff Pi 2 requires 25mA at 9VDC on a center-negative plug. Do not exceed 12VDC at the power jack.” source
Checked 2026-10-13
9.6V DC · centre negative · draws 25mA
from the maker
“Power Supply 9V battery included (optional 9.6VDC-200mA power adapter not included) … The Bass Big Muff Pi 2 requires 25mA at 9VDC on a center-negative plug.” source
Checked 2026-10-13

69.85 × 114.3 × 53.34 mm (2.75 × 4.50 × 2.10 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.