A:AnswerI don't believe it will work without it. However, you do not need an internet connection to use Bluetooth. Bluetooth will just form a connection between the soundbar and the subwoofer.
A:AnswerThere isn't a sub-out that I saw for a direct hookup and I'm not sure of the Bluetooth protocols. By that I mean I don't know of the bandwidth is specific to one subwoofer or is such that you could pair two. Something akin to having a portable BT speaker and someone else pairing their phone to it to block your signal.
A:AnswerNo, but you can enhance voice clarity by tuning the volume, treble and bass - I have done it and it is much better than without the sound bar and also much better than without the tuning.
A:AnswerI don't believe so, as the system is only designed to recognize the single soundbar, in a x.1 system (2.1, 4.1, etc.) Very few digital setups that do not use any wiring recognize more than one sub, as bass is omnidirectional.
