Electro-Harmonix · Distortion

Nano Metal Muff

9V · 24 mA · maker

Electro-Harmonix Nano Metal Muff power requirements

9V DC · centre negative · draws 24mA
the voltage it ships for · also runs on a 9V battery · from the maker
“An optional 9VDC, center-negative power supply can be inserted into this jack to power the Nano Metal Muff. The Nano Metal Muff requires 24mA at 9VDC on a center-negative plug. Do not exceed 12V at the power jack. When using a 9V battery, plugging into the INPUT jack activates power.” source
Checked 2026-10-13
9.6V DC · centre negative · draws 24mA
from the maker
“Power Supply 9V battery included (optional 9.6VDC-200mA power adapter not included) … Current Draw 24 mA” 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.