I copied an mp3 BB rhythm file I made to a digital recorder and played it back by plugging my powered external speakers into the headphone jack of the recorder.

Playback volume was not "loud" enough if I want to play banjo with the rhythm file accompanying my playing.

I then plugged two other (different) powered speakers and on playback from recorderand was able to turn up volume to quite loud. These particular speakers had specs of "10V, 700 mamps" in back (there were no specs on the "not loud" speakers) mentioned above.

Which now has me wondering. What sort of portable speaker system (convenient to carry around) do you members use if playing solo for people and having the BB rhythm file coming through loudly enough?