How to Bass Boost JBL Boombox

Top view of the JBL Boombox power bank speaker.

Change how loud the bass is on the JBL Boombox, by turning on and off its bass boost mode. When switched ON, this mode makes the passive bass radiators vibrate much more. Plus, this adds a low rumble quality to the playing program, that travels pretty far from the speaker. So, for you boom lovers, this post shows how to bass boost this speaker, to get that extra kick.

How to Turn Off Bass Boost on the JBL Boombox

By default, the Boombox has bass boost mode turned ON after a reset. This adds a bit of treble and lots of extra bass, as compared to when this mode is OFF.

Top view of the JBL Boombox, showing the -Bluetooth- and -Volume Down- buttons.

You can turn this extra bass mode off. To do that, press and hold in the Volume Down (-) and Bluetooth buttons. Find these circled in green in the last picture above.

Hold for about ten seconds, until the Power and Connect Plus buttons both light briefly. See these lamps pointed out in the next picture.

The -Power- and -Connect Plus- buttons glowing.

How to Turn On Bass Boost on the JBL Boombox Speaker

To activate bass boost once again, press and hold the Volume Down and Bluetooth buttons. Hold them in until the Power and Connect Plus buttons light white. Then release them. When the center buttons light up for a second or two and then go off, bass boost has resumed.

Warning

The drivers really thump when you switch ON bass boost. So take care in how loudly you play this speaker with the bass boosted. Doing so avoids damage to the speaker drivers. If the bass is crackling, tapping, or otherwise distorting, turn it down !