Electro-Harmonix · Modulation

Bad Stone Phase Shifter

9V · 18 mA · maker

Electro-Harmonix Bad Stone Phase Shifter power requirements

9V DC · centre negative · draws 18mA · needs a supply of at least 25mA
the voltage it ships for · also runs on a 9V battery · from the maker
“The Bad Stone operates with a standard 9V battery or an optional 9VDC AC Adaptor capable of delivering at least 25mA to the 9V power jack, such as the EHX9.6DC-200. The AC Adapter must have a center negative plug. … The Bad Stone has a current draw of 18mA at 9VDC.” source
Checked 2026-10-13
9.6V DC · centre negative · draws 18mA
from the maker
“Power Supply 9V battery included (optional 9.6VDC-200mA power adapter not included) … Current Draw 18mA” 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.