Sony HT-GT1 Operating Instructions Manual page 34

 If one of the system is not equipped with Party Chain function
Example: When connecting using this system as the first system
Last
system*
* You can connect the system which is not equipped with Party Chain function at the last
system. Be sure to select the audio in function on this last system.
You must select the first system as Party Host so that all systems are playing
ˎ
the same music when Party Chain function is activated.
In this connection, the first system and the last system are not connected.
ˎ
34
GB
Second system
Continue the connection
until the last system
First system
Rear of the
subwoofer