This is a Epi mini amp. The 24v adaptor for it costs $13 on amazon. I tried to power it up with a drill battery, but it did not work. The speaker tests good. I am not a solid state amp tech and do not know how to go further. If you do, you can have a nice little practice amp for almost nothing. They list for $45 on Reverb.com+shipping. I am asking $10 'as is" OBO, trades considered.