Properly power your 18V pedals with an adapter you can count on.
The Dunlop ECB-04 18V DC Adapter is a quiet, well-regulated power supply that powers most effects pedals that run on 18 volts. With 1000mA of current, the ECB-04 can even run power supplies such as the DC Brick. 2.1mm by 5.5mm positive barrel with negative center.
Note: Be sure to check the label on the power supply to ensure compatibility with your effects pedal. ECB-04 adapters manufactured before summer 2011 had a current rating of 150mA and are not compatible with the DC Brick. Newer ECB-04 manufactured summer 2011 or later, which are marked with a current rating of 1A (1000mA), can safely be used with the DC Brick.