For pedals with higher voltage requirements, use this voltage doubling reverse (center positive) cable with a 2.5mm straight barrel end to combine two Pedal Power outputs to make 18V or 24V. 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. For a voltage doubler with a 2.1mm barrel connector and standard (center negative) polarity see cable part # PPY.