Explains the Bass Boost JBL Flip 4 procedure here. Now you can change how loud the bass is on the Flip 4, by turning ON and OFF this mode. When ON, it makes the passive radiators on each side of the unit vibrate much more. Plus, it adds a low rumble quality to the playing program, that travels pretty far from the speaker. So, for you boom lovers, this post shows bass boost this speaker, to get that extra umph.
Bass Boost JBL Flip 4: You Can Turn it OFF
By default, this speaker has bass boost mode turned ON after a reset. This adds a bit of treble and lots of extra bass to the audio.
You can turn this bass boost off by pressing the Volume Down (-) and Bluetooth buttons.
Then Hold them in for roughly ten seconds, until the Power and Connect buttons light up white. This deactivates bass boost. Then the Flip 4 sounds like it now has more midrange frequencies and less bass.
Bass Boost JBL Flip 4: Turning It ON
To re activate bass boost once more, press the Volume Down and Bluetooth buttons. Then hold them in until the Power and Connect buttons light white. Then release them. When these buttons above light together, bass boost is active once again.
Warning
The unit really thumps when you switch ON bass boost. So be warry of how loudly you play this speaker with the bass boosted. Caution here helps to avoid breakage to the drivers. If the bass is crackling, snapping, tapping, or otherwise distorting, turn it down !