You definitely need to use the correct polarity on the power plug. See specs below:
5.5 x 2.5mm barrel, tip positive.TimeFactor can operate from a 5W power source that supplies regulated 9 to 12VDC max.
minimum required power ranges from a maximum of 4.5W at power up (all
LEDs lit) to about 3.6W in normal operation depending on how many LEDs
For a regulated 12VDC, the current requirement is 380mA at power up and 300mA in normal operation. Do not use unregulated 12V.
For a regulated 9VDC, the current requirement is 500 mA at power up and 400mA in normal operartion.
We recommend the Eventide PowerFactor for your stompbox power needs.