If the soundbar volume is too low or too loud, you can try the following steps:
Use the volume controls on the Firestick remote to adjust the soundbar volume.
Check the soundbar's settings for any volume presets or equalizer adjustments.
Adjust the TV volume to an appropriate level if it is affecting the overall audio output.
Ensure that the soundbar and TV firmware are up to date.
If the issue persists, refer to the soundbar's user manual or contact the manufacturer's customer support for further assistance