No volume on bluetooth speaker, was working, today no sound,

See highlighted text. It has an Equaliser
Description

• Bluetooth 2.1 and enhanced bass technology/compatible with all Bluetooth enabled devices.
• USB/SD/MMC memory cards audio inputs.
• Bluetooth wireless range: Approximately 30 ft..
• LCD display (track you're playing or adjust EQ level or volume).

• Imported from USA (Sizes & Specifications are based on the USA Market).

FrisbyFS-5020bt Bluetooth 5.1 Speakers provides clear sound from
all satellite speakers and woofer from up to 30 feet away. You
can sync any Bluetooth enabled device, your phone, tablet, media
player or even your computer. The subwoofer features an LCD
screen that makes it easy to see which track you're playing or
adjust EQ level or volume. Frisby fs-5020bt supports Bluetooth
5.1 Technology for streaming audio wireless from devices that are
Bluetooth-enabled. For other non-Bluetooth devices, there is a
3.5MM auxiliary input ports. Additional conveniences include an
LCD display and included remote control. You've got full power to
fill your room with big, balanced sound. Both speakers and the
subwoofer are magnetically shielded to provide the protection
against image distortion from external electronic sources.
Compatible with all pc models, laptops, smartphones and all mp3
players, iPod, Discmans, Walkman's equipped with headphone jack.
The included remote control has controls for bass and treble EQ, volume, play/pause, previous/next track, Bluetooth sync and
power. The speaker also has an LCD display and volume/sync
buttons.

The symptoms you described suggest that there may be several possible issues with your Kustom Bluetooth PA speaker. Here are some steps to diagnose the problem:

1. Check the battery: Ensure that the battery is fully charged or replace it with a new one if needed. If the battery is old or worn out, it may not provide enough power to the speaker, causing the crackling sound.
2. Check the connections: Make sure that all cables and connections are properly plugged in and secured. Loose connections can cause crackling sounds or no sound at all.
3. Check the volume: Turn up the volume on both the speaker and the device connected to it (such as a phone or tablet) to see if that resolves the issue. If the volume is too low, it may result in no sound or faint sound.
4. Test the mic and instrument input: Try connecting a different microphone or instrument to the speaker to see if the problem is with the original mic or instrument. If the new mic or instrument works, then the issue is likely with the original device.
5. Check the speaker components: If none of the above steps work, there may be an issue with the speaker's components. It's best to bring the speaker to a professional technician or authorized service center for repair.

Hopefully, one of these steps will help you diagnose and resolve the issue with your Kustom Bluetooth PA speaker.

Notifications sounds from either external speaker or headphones, but never from the ear piece volume. Your question suggest that the external speaker is damage but it only works on external speaker. Try using a headphone or a bluetooth to make calls, if they work, then you need to fix the external speaker.

Be sure JBL is charged, press the power button on JBL, press the Bluetooth button on JBL. Turn on your phones bluetooth,make it visible to all devices, make it search for aplliances. When it finds JBL - pair it (you may have to make up a pairin number). The "sun" button controls different sound qualities. And turn the volume up! You should download the JBL MUSIC FLOW APP from the APP STORE to make the most of it.

Disconnect it then reconnect it

may be the volume in the source is low. pl increase the volume in sound source and try

Try resettin, hold home button and power button for about 25 seconds, if this doesnt work the speaker prob went out. they have two speakers, one u hear people on and the one u hear music from.

After pairing it, have you tried to go to your sound settings in Control Panel and selecting the bluetooth device as your standard sound device?

see if u can get master speaker wiith cables on it that died on ebay best bet what kinda are these