You can control how loud the bass is on the JBL Xtreme, by turning on and off its bass mode. When switched on, this extra bass mode makes the passive bass radiators on the sides of the speaker vibrate much more. Plus, this mode adds a low rumble quality to the playing program, that travels pretty far from the speaker.
How to Turn On JBL Xtreme Bass Mode
By default, the JBL Xtreme 1 has its bass mode turned ON after a reset already. This adds a bit of treble and lots of extra bass to the audio output as compared to when low frequency mode is OFF.
If you have previously turned bass mode off since the last speaker reset, then you can turn it ON again by pressing and holding in the Volume Down (-) and Bluetooth buttons for about ten seconds, until the Power and Connect buttons light up white.
E.g. See these lamps circled in the next picture. Also, find the buttons you need to press, as we point out with the green arrows, on the top of the speaker, as shown in the last picture.
To switch bass mode back to what it was before, then again press and hold the Volume Down and Bluetooth buttons in until the Power and Connect buttons light white. Then release the buttons.
Finally, when the buttons inside the circled oval above light white, the low frequency mode has resumed once again.
The drivers really thump when you enable bass mode. So use caution in how loudly you play this speaker with the resulting extra bass, to avoid damage to the speaker drivers inside. If the bass is crackling, tapping, or otherwise distorting, turn it down !
Also, bass mode depletes the speaker battery faster. So if you really need to conserve power, we suggest switching bass mode OFF.
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References for How to Turn On JBL Xtreme Bass Mode
- 2021-09-06: First published.