Burkey Flatliner Power Supply pedal power supply. The Burkey Flatliner Power Supply is a pedal power supply with 9 fully isolated and silent DC outputs. It has 5 9V DC 200 mA outputs, 1 12V DC 200 mA output, 1 adjustable 3-9V output, 1 adjustable 3-12V output, 1 9 or 12VAC 1000mA output. All outputs have a negative center. Includes 9 connection cables.