Meridian 541 User Manual page 11

Second room system – Type 7
The 541 Surround Controller has all the features necessary to
set up a two (or three) room hi-fi system. From either room you
can watch and listen to any source playing in the main room, in
addition to any local sources in that room. The Meridian
communications system lets you control the system from either
room.
You set up the second room using Type 7, and the main room
using whichever of the other types is appropriate; eg Type 5.
5