A:AnswerIf it has hdmi arc you are ok , if the jvc don’t have it , you have to use a fiber optical cable or if the tv also doesn’t have optical you will need an adaptor from the tv sound output to hdmi of optical at the sonos beam.
A:AnswerYes , add 2 surround play ones and sync and you can use it with tv sound and music sound like pandora as a surround system , the app has a video mode and a music mode when using the beam and the play ones as a surround.
A:AnswerIf your current sub is the Sonos sub yes. You can only use the Sonos sub. Sonos is currently working on a smaller Sonos sub . That will be perfect for the Sonos Beam gen 2.
A:AnswerAny hdmi cable that mention “ARC” capable with work up to many many feets .
If your sources are 4k , them get them ARC 4k capable and you will be ok .