Electronic Switch Speakers

Some people like to listen to a 5+1 surround audio system, without giving up a stereo system. However, both systems in one room would require eight speakers, which is too many and not necessary. Since both systems have speakers for the left and right channels the idea was born to build a switch box which allows configuring the system as 5+1 or as stereo while only requiring the 5+1 system's speakers.