Had this for a few weeks now. It is loud enough for outdoors, The sound is clear bass is great. I have also listened to this while driving with my truck windows open and again it was clear sounding and loud enough to hear at 70 mph.
I have a Flip 4...which in it's own right is a great speaker. This one caught my eye and WOW is it an upgrade. The bass is quite amazing and with the EQ in the app, you can give the low a bit more bump for lower volumes. So far, really happy!
I wear this bad boy on my belt as go through my routine the sound is on the money when i'm playing my jazz. As I walk and folks can hear the music but they can't detect where the sound is coming from because my jacket rests over the speaker and it still sounds great. Thanks JBL..