Dear Drowned,

You might be surprised to hear how loud your banjo actually is. Banjos very typically sound much quieter to the player than to someone listening from *in front of* the banjo. To see what I mean, play within a few feet of a reflective surface like a flat wall. The volume may surprise you.

As to your specific question, I don't have any recommendation. I would go to a music store where they sell such things, and try them out. Battery powered amps are typically not very loud.

Stelling Banjos tend to be pretty loud compared to most. You might try one of them.

Best of luck!

Pete