Q: I purchased a Fulltone Soul-Bender fuzz pedal, and it says that it requires a “center-positive” power supply. What is this, and what do I need?
A: Many pedals, such as those from Boss, Ibanez, and many others, have a power supply where the “negative” side of the current is fed through the center connection on the power supply jack/plug. Some pedals, such as the Soul-Bender, require the opposite, where the “positive” side of the power is fed through the center connection.
There are solutions, of course: Fulltone makes the FPS-2, which is a center-positive power supply specifically for their Soul-Bender and other pedals. You can also get reverse-polarity cables, which convert center-negative to center-positive from Voodoo Lab for use with their Pedal Power power supplies, and reverse-polarity converters from Visual Sound for use with their One-Spot power supply.
Fulltone FPS-2 center-positive power supply
