In your setup you could try:
- place the passive in the mainroom, the first speaker connected to the passive. ouverure connected by powerlink.
In this setup. The ouverure will switch the passive on and controls also the volume.
- extend the speaker cable to the bedroom and use the ir cable/eye to the passive.
Not sure if this will work. Also if by chance the passive will switch the ouverture on, the startupvolume on the ouverture could cause a low audio level in the bedroom.
I would search for another solution.
1. You could- buy just 1 (if that's enough for you) active speaker for the mainroom, connected by powerlink to the ouverture.
and place the passive/ir-eye in the bedroom and connected by ML to the ouverture.
2. place the passive in the mainroom connected with powerlink to the ouverture. No extra ir-eye needed. Buy a third party ir-extender which you place in the bedroom. extend just the speakercable to the bedroom.
But again, the latter it's not the prettiest solution. Or just add another passive to the system. Both rooms then have their own amplifier.