This is very similar to my setup at home but i have only 1 pair of Redline 6000's connected to my main room system and a beovision with a pair of CX50's in the link room.
Christian is correct - Your 2nd diagram looks fine but you could do it another easier way using less equipment.....
you could use a 7pin din aux-link cable between your two rooms straight from the beomaster to the MX - this way you wouldn't require the MCL2AV or the transciever in the link room (the television acts as the transciever in this case).
However the audio would come from the MX and the two CX50's at the same time if connected via the speaker terminals on the back of the beovision (as you cannot mute the MX's internal speakers without muting the external ones also unless they are powerlink type) - you could use a passive amp to get round this or just live with it!
In the main room i would be worried about overloading the amplifier with so many speakers connected up.
what i would do in your case is as follows:
- Beomaster (in cupboard) - tape 2 connected to PC, aux connected to Beovision in link room
- Beomaster "speaker 2" socket connected to MCL2AV, connected to transciever in main room
- 2 passive amps connected to powerlink sockets on the MCL2AV [if the beomaster doesn't have enough juice to power them on its own - if it does just use an MCL2A instead]
- connect the outputs of the passive amps to your main room speakers [see comment above]
- link room will have the Beovision connected to the CX50's via the tv's speaker sockets.
