is the subwoofer synced with the soundbar? Plus it also depends on the movie or content you are watching? Like watching action movies or Batman VS Superman there are plenty of scenes where I can hear the "BANG" from the subwoofer when buildings start to crash. I have the KS550 soundbar volume on 20, subwoofer settings +3, sound effect movie, sounds alright to me. Not all scenes use the subwoofer or some shows dont take better use of the subwoofer. Are u sure all the cables, sound settings is correct or on the proper DTS, dolby digital, bluetooth set on tv, etc. Did u remember to remove the small plastic cap on your fiber optic cable before connecting to the tv or soundbar?. If all the cables, settings for tv, soundbar, subwoofer is set up correctly and still have issues maybe its just the shows, movies your watching? Maybe they didnt make full use of subwoofer or its just not up to your standards ? Try adjusting the volume a bit maybe or change some settings on your tv? Maybe that will help?
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