Adjust the bass response of the JBL Charge 4, by turning on and off its bass mode mode. Thus, when ON, bass mode makes the passive radiators vibrate a lot more. Further, this mode adds a decidedly “thumpy” quality to the content playing. This makes this speaker sound much bigger than it really is.
How to Turn OFF
First off, by default, this BT speaker has bass mode ON already. Furthermore, this adds a bit of extra treble and lots of extra bass to the audio output.
How to Turn ON JBL Charge 4 Bass Mode: Step by Step
If you turned bass mode OFF, you can turn it ON by pressing the Volume Down (-) and Bluetooth buttons. Hold for about ten seconds. Then release when all lights on the top light up.
Moreover, you keep holding them until the oval ring around the buttons lights up.
Furthermore, to turn ON bass mode, again press the Volume Down and Bluetooth buttons. Hold them until the oval button ring lights up. Then release them.
Finally, when the ring goes off, bass mode is active once again.