How to Connect JBL Speakers to Each Other
JBL uses three pairing systems and they do not mix. Here is which models work together, the pairing steps, and why a Flip 6 will not link to a Flip 7.
Two JBL speakers connect to each other only if they use the same pairing technology. JBL has shipped three: Connect+, PartyBoost and Auracast, and they do not talk to each other. A Flip 6 will not pair with a Flip 7, because one uses PartyBoost and the other uses Auracast. Check which system your speakers use before anything else.
This is the whole problem in a sentence, and it explains almost every case of two JBL speakers refusing to link. They are not faulty and the firmware is not out of date. They are speaking different languages.
Which system does your speaker use
Look at the button on the speaker. Connect+ speakers have a button marked with the Connect+ logo. PartyBoost speakers have a button marked PartyBoost, usually a circle with two arcs. Auracast models have an Auracast button, and JBL began the switch with the 2024 generation.
| System | Example models | Pairs with |
|---|---|---|
| Connect+ | Flip 4, Charge 3, Xtreme 2, Pulse 3 | Other Connect+ speakers only |
| PartyBoost | Flip 5, Flip 6, Charge 5, Pulse 4, Pulse 5 | Other PartyBoost speakers only |
| Auracast | Flip 7, Charge 6, Clip 5, Go 4, Xtreme 4 | Other Auracast speakers |
The Xtreme 4 is the odd one out and worth knowing about. It handles both Auracast and older PartyBoost speakers, which makes it the one model that bridges the two generations. Nothing else in the range does that.
Note also that the Charge 5 and the Charge 5 Wi-Fi are different products with different pairing systems, despite the name.
How to pair two JBL speakers
- Turn both speakers on and place them within about 30 feet of each other.
- Connect your phone to the first speaker over Bluetooth as normal. Only one speaker connects to the phone. The second connects to the first.
- Press the PartyBoost, Connect+ or Auracast button on the first speaker. The light will pulse.
- Press the same button on the second speaker within about 30 seconds. Both will chime once the link is made.
- Start playing. Both speakers now output the same audio.
To switch from party mode into stereo, press the button on either speaker again. Stereo mode assigns one speaker the left channel and one the right, and it requires two speakers of the same model. Press once more to return to party mode, or hold the button for about five seconds to disconnect them entirely.
PartyBoost supports more than two speakers in party mode, with over 100 in theory, though the practical limit before dropouts start is far lower. Stereo mode is always exactly two.
Using the JBL Portable app
The app does the same job with a screen instead of buttons, which is easier when you have several speakers and are trying to work out which is which. It also handles firmware updates, which occasionally fix pairing reliability.
Older JBL Connect and JBL Connect+ apps have been retired. If you are still running one of those, the current JBL Portable app is the replacement, and having both installed causes conflicts.
The app cannot bridge two incompatible systems. No update makes a PartyBoost speaker talk to an Auracast one, with the Xtreme 4 exception noted above.
When they will not link
Different pairing systems is the first answer and covers most cases. After that:
The second speaker is still connected to another phone, so it will not accept a link. Turn Bluetooth off on every other device in the house and try again.
Both speakers are connected to the phone. Only one should be. Disconnect the second from your phone’s Bluetooth list before pairing them to each other.
Firmware is behind. Open the JBL Portable app with each speaker connected and let it update.
Distance or obstruction. Keep both within 30 feet with a clear line between them while establishing the link. Once connected they tolerate more.
If nothing works, reset the speaker by holding the volume up and play buttons together for about five seconds, then pair from scratch. That clears the stored device list, which is what usually blocks a stubborn connection.
What linking two speakers actually gets you
In party mode, more volume and wider coverage, with both speakers playing the full range. Useful outdoors or across a large room.
In stereo mode, genuine left and right separation, which is a bigger improvement to sound quality than the extra volume is. It needs matching models, and it needs you to sit between the two speakers roughly 6 to 10 feet apart. Set them further apart than that and the middle of the mix falls into a hole.
Expect slightly worse battery life on both units, since the link runs alongside the audio stream.
Frequently asked questions
Can you connect any two JBL speakers together?
No. They must use the same pairing system, and JBL has used three across recent generations. Connect+ speakers pair only with Connect+, PartyBoost with PartyBoost, and Auracast with Auracast. That is why a Flip 6 and a Flip 7 will not link despite being consecutive models in the same line. The Xtreme 4 is the single exception, since it works with both Auracast and PartyBoost.
How many JBL speakers can you connect at once?
In party mode, PartyBoost and Auracast both support large numbers, well beyond what anyone owns, though dropouts become likely long before the theoretical limit. In stereo mode it is always exactly two, and both have to be the same model so the left and right channels are acoustically matched.
Why won’t my JBL speakers connect to each other?
Check the pairing system first, since incompatible generations are the most common cause. After that, make sure only one speaker is connected to your phone, turn Bluetooth off on every other device that has ever paired with either speaker, and keep both within 30 feet while linking. If it still fails, reset each speaker by holding volume up and play together for five seconds, then pair again from scratch.
What is the difference between PartyBoost and Auracast?
PartyBoost is JBL’s own system, introduced in 2019 and used through the Flip 6 and Charge 5 generation. Auracast is an industry standard built into Bluetooth LE Audio, which means it can eventually work across brands rather than only between JBL products. Auracast also uses less power and holds up better with many speakers connected. The two are not compatible with each other.