Newer models (Xtreme 3 & 4) require updates to unlock the JBL Portable App EQ . Stability
To update the firmware on your JBL Xtreme series speaker (including the original Go to product viewer dialog for this item. Go to product viewer dialog for this item. Go to product viewer dialog for this item. jbl xtreme update firmware
If it remains frozen for more than 10 minutes, cancel the update, restart both your phone and the speaker, and try again. The Speaker Won't Turn On After the Update Newer models (Xtreme 3 & 4) require updates