I am trying to set up my onkyo receiver with my polk 5.1 speakers and the subwoofer. With my tv setup in the optical plug I hear every speaker and the sub. when I try to listen to the radio and the cd player , all I hear is the front speaker, center and sub. I want to get the back speakers in for the surround sound. anyone familiar with this receiver have any idea what I'm doing wrong? I have tried different configurations on the setup config but nothing changes derreke
