There are several reasons why a speaker has volume issues. It could be because of the speaker's battery, the device connected with the speaker, the audio source, and so on.
If your Soundcore's volume is too low, please try these steps:
Confirm that Soundcore is fully charged
Reset Soundcore by holding the Bluetooth button for 5-8 seconds
Connect Soundcore with another device
Try a different app or audio source
Make sure to turn up the volume of both Soundcore and the paired device
If the volume issue persists, please contact us at service@soundcore.com for further assistance. Make sure to mention that you have tried the listed steps so our agents do not ask you to repeat them.