I'm currently running the Logitech Z-5500 my MacBook via Toslink to Toslink mini. I really like playing music using 4 speakers as I feel it "immerses" me more into the music, but the only option is to use 2, 3, or 4 of the speakers. There's no option, as far as I can tell, to enable all 5 speakers. Is there any way to do this??