LOW END MISSING – SUBWOOFER MUTE
Great thing about wireless connection when dealing with any sound system is the absolute absence of sore-eye wires lying around. The downside arises when poor connectivity issue rear its ugly head. Should you ever feel there is something flagrantly missing from what you are listening, notably the low end of the spectrum, making the whole thing sound very thin, too clear and cheap you may want to consult this article pertaining to subwoofer connection (or disconnection) to any of the "SJ" series sound bar.
Should this be a reoccurring situation in your household, you may want to look for firmware update on your Network Router or perhaps change the broadcasting wireless channel of the router to avoid it interfering with the Bluetooth connection your sound bar and subwoofer share.