Voodoo Lab Cable 2x2.1mm to 2.5mm Reverse Polarity Straight-Straight Works with Voodoo Lab Pedal Power 2+ and ISO-5 For pedals with higher voltage requirements, use this voltage doubling reverse Ideal for Electro-Harmonix Deluxe Memory Man, Stereo Memory Man, Electric Mistress and others that require 24V. Flanger Hoax requires this cable but only requires 18V. A 2.5mm straight barrel end to combine two Pedal Power outputs to make 18V or 24V.