current draw

Current draw is the amount of electrical current, measured in milliamps (mA), that a pedal consumes from its power supply or battery¹². Manufacturers list it in pedal specifications, and it varies widely, from 4 mA for the Boss SG-1 to 300 mA for the Walrus Audio Canvas Volume¹³. It matters when sizing a power supply: Brian Wampler advises that the supply should provide more than the total current draw of all pedals, since daisy chaining underpowered pedals can make them noisy or underperforming⁴. Reviewers also note when a pedal's draw is high relative to its type, such as the Blackstar Dept. 10 Boost, whose power supply should be chosen accordingly⁵.