Recently got a Beomaster 4500 and is trying some things. When I tried to enter option settings to option 2 I noticed that it displays OPT 2.5 This made me a little curious as I have only seen that notation of option settings on the MCL2AV before. Looking at the user manual for Beosystem 4500 I found some interesting stuff about both an option 3 to use if an other MCL unit is placed close to the Beosystem 4500 and option 4 (for the Beosystem) if it is placed in the same room as a MCL2 unit.   Login to view imageI am not sure what option 3 does if it will lower the IR sensetivity or what? Or has it something to do with 2 way communication? Option 4 is normaly used to put a unit in a mode where it only responds to Link + command. But this isn't mentioned in the user manual. Trying to set the BM4500 option 4 it responds to normal commands, so also here I am a little confused. Option 5 and 6 apperently indicates if it is a Master or a slave in a MCL 2  system. However the manual mention that option 6 is for future use and must not be selected. I wonder how the BM4500 should be able to work as a slave in a MCL2 system connection wise as it does not have the MCL input as the MCL2AV has? It sees wierd to be mentioned in the manual if the product is not hardware wise ready for it. Any insights are welcome. I will of course try to dive a little deeper in to this rabbit hole