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Low audio | Bose Bluetooth® audio adapter
Be sure the system is set up properly and all connections are secure.
A connection may have come loose or may be connected incorrectly. For more info, see Setting up your product.
Turn up the volume of the connected device.
Set the device volume to 90–100% to send a strong signal to your product. Then, use your product to adjust the volume level.
Reset your product.
Much like rebooting a smartphone, your product might need to be reset on occasion to correct minor issues. For more information, see Resetting your product.
Try a different app.
If the issue only occurs with a particular app, it is likely related to the app or app settings.
Try playing different types of media.
Different media types might produce different quality sound. For example, Podcasts, music stored locally on your phone, MP3s, streaming music services (Spotify, Pandora), videos on your device or stored in the cloud, etc. can all vary in quality. Try different media to determine if the issue is specific to certain media.