Questions about Sony HT-CT381S Silver

From a purely technical point of view, this will be possible. However, the quality of the sound will probably suffer considerably. I am very satisfied with the subwoofer and the soundbar!

Theoretically, yes, but why would you want to do that? You lose quality via Bluetooth and if you treat yourself to a soundbar, I would definitely connect the soundbar via cable. (HDMI or Toslink)

Almost... :-) My Sony soundbar is connected to a Samsung TV, a Samsung DVD player is connected to the sound bar and an audio source is set to "analogue" - whatever is connected, I have to switch on the soundbar myself, but when I switch off the TV, the soundbar also switches off (it may well be that I did not understand something correctly in the settings). The HDMI channel changes automatically without any problems, with the exception of the analogue source. I am very satisfied with the soundbar, it is hardly noticeable and the sound is very satisfactory for me. Networking with a Sony device should not cause any problems.

I don't need an additional amplifier. My DVD player (Sony, also for Blueray discs, approx. 80 Fr.) is connected directly to the soundbar via HDMI cable.