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Too little bass or too much treble from product | Bose QuietComfort Ultra Earbuds (2nd Gen)
If the sound lacks bass or has too much treble:
Try the following:
Check the equalizer settings in the Bose app.
Adjust bass and treble controls on the source.
Try a different app.
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.