We do not supply a power adapter, since we sell our pedals throughout the world and many of our customers have pedal boards with multi-pedal power supplies.
Any 9V center negative (Boss-style) regulated power supply that can provide enough current will work. The plug should have 2.1mm inside diameter and 5.5mm outside diameter. This is the type of power supply used by almost all guitar pedals, and we recommend using one designed specifically for effects. A few examples are the CIOKS DC series, Voodoo Lab Pedal Power series, Boss PSA Series, MXR dc brick, and Visual Sound One Spot. If you have a few pedals, we recommend a multi-pedal power supply with independent regulated outputs (not daisy chained). See below for notes on specific power supplies.
Here are the specs:
Voltage: 9V (regulated)
Minimum current: see bottom of pedal or documentation
Polarity: center (pin) negative
Barrel diameter: 2.1mm x 5.5mm
The Bit Mixer and Bit Buffer can run at up to 18V for more headroom. Our other pedals are designed to run at 9V only.
Voodoo Lab Pedal Power 2 Plus
Outlets 1-6, 7, & 8 provide 100 mA of current. Our effects pedals with USB require more current, so you need to use L5 outputs (5 & 6) with the DIP switch set to NORMAL.
MXR dc brick
The eight 9V outputs can deliver a total of 1200 mA in any combination. Add up the current requirements for all of your pedals to ensure it is less than 1200 mA.
T-Rex Fuel Tank Classic
The eight 9V outputs can deliver a total of 500 mA in any combination. Add up the current requirements for all of your pedals to ensure it is less than 500 mA.
Visual Sound One Spot (daisy chain)
We do not recommend using daisy chain power supplies with our pedals. If any pedal emits noise onto the power line, it can get picked up or amplified by other pedals on the chain. However, some people use One Spot power supplies without any noise issues.