Powerbase Power Supply. This power supply is an alternative to the Irwin Powerbase 32, which has now become unavailable. It has the same electrical specification as the Irwin model, but comes with case which is manufactured from sturdy, powder coated steel, rather than plastic. Output voltage is continuously variable within the ranges 0-15V AC or 0-20V smoothed DC, at up to 8A The unit is short circuit protected and comes with maximum voltage lock.