Q: What about power supply? What should I use? A: Most little amps like this end up being powered by batteries, but any stable DC voltage supply ranging from 6v to 18v will work depending on what impedance you have hooked to it. Recommended max voltage for 4 ohm will be 9v, max for 8 ohm is 14v, max for 16 ohm is 16v.
So, the Hosa branded adjustable voltage adapter that I bought, is the ACD-477. It's 3v-12v @1,200mA. I imagine, it'll be 110v, & 50/60hz, as well. As, I am in the Americas. It's been a while since calculating any input voltage impedences, but I can only assume that this is a pretty standard Power Supply.
I have to remember to ask for help with connecting a barrel input jack, as well. Are there points on the board, for maybe trading this, for the battery clip jack spots....?