To adjust bass on a SoundTouch 300, please follow the steps below:
To reset the bass setting: On the remote control, press and hold BASS until the SoundTouch indicator on the soundbar blinks twice.The bass setting resets to original factory settings.
Regarding the volume cutting out when a channel is changed, please try to reset your soundbar by following the steps below:
However, please be advised that you cannot change the volume on your soundbar while you are using your remote with the cable box source. You will need to switch back to the Bose system source should you wish to change the volume.
Dec 10, 2017