The Voodoo Lab Pedal Power X4 Expander Kit adds two 9V and two 18V isolated DC outputs to compatible Voodoo Lab power supplies. Its ultracompact size makes adding on to your existing system quick and easy, mounting to the even most space-challenged pedalboards. The innovative hybrid DC transformer design of Pedal Power X4 combines exotic components, linear regulation and computer optimized filtering to establish industry-leading audiophile quality power that unveils the hidden sonic potential of your rig.