Electro-Harmonix · Fuzz

Ram's Head Big Muff Pi

9V · 2 mA · maker

Electro-Harmonix Ram's Head Big Muff Pi power requirements

9V DC · polarity not stated · draws 2mA · needs a supply of at least 30mA
the voltage it ships for · also runs on a 9V battery · from the maker
“The Ram’s Head Big Muff Pi may be powered from a 9V battery or an optional 9VDC AC Adapter such as the EHX9.6DC-200 or any Boss® or Ibanez® style AC adapters capable of delivering at least 30mA. … The current draw is approximately 2.0mA at 9VDC.” source
Checked 2026-10-13
9.6V DC · polarity not stated · draws 2mA
from the maker
“Power Supply 9V battery included (optional 9.6VDC-200mA power adapter not included) … Current Draw 2mA” 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.