Chosen Solution

I upgraded the Charge 3 to the Connect+ firmware. I have connected the Flip 4 and the Charge 3 together and both work fine in Party Mode. Once I try to select Stereo it throws and error saying to move my phone closer and try again and close the app etc. I have done all that. Turned the speakers on and off. Repaired Bluetooth. Uninstalled and reinstalled the app, but only seems like party mode works. Please help

Stereo mode requires two of the same model speakers.

How do you put a charge three and flip 4 in party mode?

My two Charge 4s seem to work normally with JBL Connect except that the output is not really stereo even if stereo mode is chosen. Also swapping he channels does not work. Both have the latest firmware 3.0.0.

I checked the way to connect as stereo. Only one speaker should be paired with the system. Other should not be. Being only one speaker paird with the audio system. Connect the unpaired speaker with paired using the connect button in the speaker. Then the stereo and party mode works fine in the jbl connect app. Remember only one speaker should be paired with the audio system.

While using two JBL speakers (FLIP 4) in stereo mode, JBL connect will automatically go to party mode if the music is paused for 5 sec. This is so annoying as app shows it is in stereo mode but actually it will be in party mode. You have to again switch from party mode and again to stereo mode. If the music is paused we have to do it again.