JBL Xtreme 2 firmware 2.3 upgrade - sound and bass test - vs v1 - YouTube
JBL xtreme 2 wont update : r/JBL
JBL Xtreme 3 | Portable waterproof speaker
How to Update JBL Portable Bluetooth Speaker Firmware - YouTube
What's with the JBL apps? Just brought home a new Extreme 2 and apps either can't find speaker and/or have no functionality. Yes, I did the update : r/ JBL
JBL Xtreme Firmware Update Instructions - Tom's Tek Stop