Newer models (Xtreme 3 & 4) require updates to unlock the JBL Portable App EQ . Stability
I exhaled a breath I didn’t know I was holding. The software prompted me to disconnect the cable and power cycle the device. I unplugged the USB, reached for the power button, and held it down. jbl xtreme update firmware
manually power it off or close the app until you see the "Upgrade Successful" screen. Troubleshooting Tips Check Current Version Newer models (Xtreme 3 & 4) require updates
: Open the app. If a new version is available, a red or orange dot will appear over the gear icon, or an "Update" button will show below the speaker image. reached for the power button