Top view of the JBL Boombox power bank speaker.

JBL Boombox 1 Low Frequency Mode Explained

You can change how loud the bass is on the JBL Boombox 1, by turning on and off its low frequency mode. When switched on, this super bass mode makes the passive bass radiators vibrate much more, and adds a low rumble quality to the playing program, that travels pretty far from the speaker.

Switching OFF the JBL Boombox Low Frequency Mode (LFM)

By default, the JBL Boombox 1 has its bass mode turned on after a factory reset.  This adds a bit of treble and lots of extra bass to the audio output as compared to when low frequency mode is OFF.

Picture of the top of the JBL Boombox 1 BT speaker, showing the -Bluetooth- and -Volume Down-buttons.
Top view of the JBL Boombox 1 BT speaker, showing the -Bluetooth- and -Volume Down-buttons.

You can turn this low frequency mode off by pressing and holding in the Volume Down (-) and Bluetooth buttons for about ten seconds.





Hold it in until the Power and Connect buttons light up together, as shown in the next picture, pointed at by the green arrows.  Find all these buttons on the top of the speaker, as shown in the picture above.

Top view of the JBL Boombox BT speaker, showing the -Power- and -Connect Plus- buttons glowing.
Top view of the JBL Boombox BT speaker, showing the -Power- and -Connect Plus- buttons glowing.

JBL Boombox Low Frequency Mode, Switching It On

To turn low frequency mode back on, again, then again, press and hold the Volume Down and Bluetooth buttons in until the Power and Connect buttons light up.  Then release the buttons.  When the buttons inside the oval island on the speaker light up, the low frequency mode resumes once more.

Warning

The drivers really rock when you activate this mode.  So use caution in how loudly you play this speaker when LFM is active, to avoid damage to the speaker drivers inside. If the bass is crackling, tapping, or otherwise distorting, turn it down !

Related Posts to JBL Boombox 1 Low Frequency Mode

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    2. JBL Xtreme 2 Low Frequency Mode for Extra Bass
    3. Sony SRS XB43 Low Frequency Mode Explained
    4. JBL Clip 2 Low Frequency Mode for More Bass
    5. JBL Clip 3 Low Frequency Mode Discussed

Other Posts About the JBL Boombox 1 Portable BT Speaker

    1. JBL Boombox 1 Buttons Explained
    2. How to Put JBL Boombox 1 in Pairing Mode
    3. How to Bass Boost JBL Boombox 1 Speaker
    4. JBL Boombox 1 Firmware Update Instructions
    5. Boombox 1 JBL Speaker Hard Reset Instructions

References

    1. JBL Boombox 2 Waterproof Speaker Product Page, on JBL.com

Revision History

    • 2023-01-24: First published.
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