MXR M238 Iso-Brick Power SupplyMXR Iso Brick Pedalboard Power Supply at a Glance: Modern or vintage, digital or analog the Iso Brick has you powered Easy to add to any effects set up Modern or vintage, digital or analog the Iso Brick has you poweredMXR realizes that the world of effects has grown. They understand that these days a lot of musicians use a combination of digital and analog pedals, so the MXR Iso Brick outputs are broken down to give you a variety of voltages and