The JBL Charge 4 waterproof speaker has six buttons and several lamps across its top, as well as battery gauge lights across the front bottom. The Power button lights in white to show that the speaker is ON or OFF. There’s also a port access panel on the back bottom. This protects the USB-C charge in and USB-A out ports as well as the auxiliary (AUX) inlet. Here, we offer our JBL Charge 4 buttons guide. This shows where the control buttons are on the speaker, explains what each button does, tells when to press them, and how to use them in general.
JBL Charge 4 Buttons Guide Functions, Descriptions, and Locations
The JBL Connect+ Button
The Connect Plus button is used to connect two or more JBL Connect+ compatible speakers together, in “party mode”, such that they all play the same audio content. Like speakers joined in Amazon’s multi room music groups, all speakers linked via Connect+ sync with each other. That is, they all play the same audio at the same time.
How to Use the Connect Plus Button
You press this button on each Bluetooth speaker you wish to add to the Connect+ group.
The picture above shows the JBL Charge 4 not joined in Connect+, because the Connect+ button is dark. But, this button lights when you connect the speaker to a Connect+ group.
Volume Down and Up Buttons
The JBL Charge 4 has two volume controls on its top, one on each side of speaker center, near the Bluetooth and Power buttons. the volume buttons are in the shapes of the minus and plus symbols. When pressed, these lower and raise the output volume of the speaker by reducing or increasing the volume setting on the paired source Bluetooth device. See the Volume Down and Volume Up buttons circled in the next picture.
How to Use the Volume Buttons
With the JBL Charge 4 paired and playing, press the minus shaped button to decrease audio output level from the speaker. Press the plus shaped button to increase audio output. Note that these controls have no effect when the speaker is not paired.
Also, the volume setting may change from paired device to paired device. That is, each paired device remembers its own volume setting. So you may have to readjust the sound output when you unpair the speaker from one Bluetooth device and pair it to another.
The Power Button
The Power button switches the Charge 4 on and off.
How to Use the Power Button
Quickly press and release the Power button to turn the speaker ON or OFF.
This button glows solid white any time the speaker is ON. See this button glowing white in the last picture above. The button is dark when the speaker is off, as shown next.
Bluetooth Discovery Mode Button
There is one row of buttons on the JBL Charge 4. Each button in that row has a unique shape. First, we have the Bluetooth button, near the left side of the speaker top, as pointed at by the green arrow in the next picture. Note its squiggly shape.
How to Use the Bluetooth Button
You’ll use this button anytime you’re pairing the JBL Charge 4 with a never-before-paired BT device. So, with this speaker powered on, press and release the Bluetooth button to place the Charge 4 into discovery mode. When in discovery / pairing mode, the speaker transmits its name and other connection information over the Bluetooth airwaves. This allows nearby Bluetooth devices to discover and connect to it.
Play Pause Button
The Play / Pause button is shaped like a right-pointing arrow and is found near the right side of the Charge 4, as circled in yellow, in the next picture.
How to Use the Play-Pause Button
Press this to pause audio play. Press again to resume audio play.
Note that this is not a mute button. That is, pausing play in this way stops media playback on the source Bluetooth device to which this speaker is currently paired. If streaming, the stream pauses. So, you won’t miss any content when you pause the speaker, as the source device (your phone, tablet, or computer) remembers the point where you stopped play. So it resumes playback at that spot when you press the play pause button again.
Reset Button Combination
You can reset the JBL Charge 4 to factory default settings and state by pressing the Volume UP and Bluetooth buttons at the same time and holding them in until the reset begins. See these buttons in the next picture, highlighted by the green arrows.
You may wish to reset the speaker to correct any erratic or strange behaviors you see from it such as failing to pair, sound distortion, failure to power off when you press the power button, and so on. Note that resetting seems to invalidate any saved connection information to this speaker on your source Bluetooth devices. So you’ll have to forget those connections and re pair the speaker after a reset in order to play your audio content through it once again.
Low Frequency Mode Button Combo
By default, the JBL Charge 4 has its bass mode turned on. This adds a bit of extra treble and lots of extra bass to the audio output.
How to Toggle Low Frequency Mode Off and On
You can turn low frequency mode off by pressing and holding in the Volume Down (-) and Bluetooth buttons for about ten seconds, until the oval ring around the buttons lights up, as shown in the next picture. Find these buttons on the top of the speaker, as shown in the picture above.
To turn low frequency mode back on, again, press and hold the Volume Down and Bluetooth buttons in until the oval button ring lights up again. Release the buttons when you see that. Then, when the ring goes off, low frequency mode has been activated once again.
The JBL Charge 4 Battery Status Lights Gauge
This speaker is also equipped with five lights that show the amount of charge currently in the built in power bank battery.
How to Read the Battery Status Gauge
When the internal battery is full, all of these lamps glow white. As the power bank discharges, fewer of the lamps glow. In the next picture, the speaker is shown at between 60 and 80 percent charge. Note that four lamps to the left are lit in this situation.
As the battery further discharges, more battery level lights at the right go out, until the charge amount reaches between 0 and 20 percent. In this case, only one lamp, the one on the far left in the last picture, glows.
Finally, when the battery discharges to critically low levels, the far left battery light blinks. Speaker shutdown will come soon when this occurs. So, recharge it right away for continued musical enjoyment.
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- 2020-04-28: First published.