Electro-Harmonix · Distortion

Metal Muff

9V · 25 mA · maker

Electro-Harmonix Metal Muff power requirements

9V DC · centre negative · draws 25mA
the voltage it ships for · also runs on a 9V battery · from the maker
“Power Supply 9V battery included (optional 9.6VDC-200mA power adapter not included) … Current Draw 25 mA” 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) … Current Draw 25 mA” source
Checked 2026-10-13

146.05 × 120.65 × 63.5 mm (5.75 × 4.75 × 2.50 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.