Great speaker...I use my extensively at my outdoor market all summer long.
People tell me to turn it down
The rest of the time it's my main house speaker...
I usually stream Youtube or Pandora if I'm not using my own SD card of music
I can really make it crank with my music between both device volume settings and the speaker but lot will depend on the recorded level of the music. A lot of youtube is low volume. My tablet has X Player that has a +15 volume boost setting (plus equalizer) I downloaded video music from the web so sound level does vary.
The old M12 isn't in the same league by no means and even though I own and use one still the playback sound is quite poor compared to some other personal sized speakers like the Monster. Still it's ok for worksite or garage. either Milwaukee using replaceable batteries beats any internal battery one I own
Honestly I don't search for another one with the 2891. I can get up to 12-14 hrs playback time on M12 4amp battery plus it can charge my devices too.