All your questions came up here before...
just a short summary:
- rca/pre out: if no signal is given, the speakers will turn off with a little sound... you would need to get a trigger voltage (5v?) to keep thema activated
- only a b&o system (1, 2, or 3) will have masterlink to share sources in the main room - BUT if your devices are connected to the system (1,2,3) for video AND/OR an masterlink audiomaster (radio, cd etc.)
- bs 1 and 2 only at ebay (not sold anymore from b&o)
Ralf
PS: I have gone through all of this (lintronic inclued!) and have given up... (vol - hold down on beo 4 is only transmitted ONCE, so to lower the volume on my pioneer avr i had to press vol down a lot of times, very annoying PLUS the popping sound drives you crazy... e.g. a lot of talk in a movie scene = center channel only = front l/r are turned of, then, as music starts, loudspeakers turn on again...etc.). SO - for 5.1 a Beosystem is required as a hub BUT with lintronic to make use of your KURO (vol down issue no the case here!).
Living Room: Beosystem 4, Beolab 7-2 (Center), Beolab 9 (Fronts), Beolab 8000 (Rears), Screen: Sony KD-85XH9096
Home Cinema: Beosystem 4, Beolab 7-4 (Center), Beolab 9 (Fronts), Beolab 4000 (Rears). Projector: Sony VPL-HW55
Home Office: BeoVision 11-46, 4 x Beolab 3, BeoCenter 9300 (BLC 1611/ML/NL)
Bedroom: Sony KD-65XH9077, Beosound Essence MK II with Beolab 6002 and Beolab 11 (all white, wall-mounted)
Dart Room: BeoPlay V1-40 on floor stand
Guest Room: BeoVision 7-40 MK IV, Beolab 7-2, BeoSound Ouverture