I've got a surround sound 5.1 system in the basement. What i want to do is put 2 speakers upstairs off of a switch so i can play audio through the 5.1 reciever downstairs, and send it to the upstairs speakers. My problem is when i select the upstairs speakers on the switch (and deselect the front right and left downstairs which also run through the switch) , i'm still outputting sound to my centre and rear channels downstairs which i don't want. Is there a way around this with the equipment i've got or is there something else i need? Your feedback is appreciated. Thanks in advance.