When both stero RCA cables are plugged into the Audio Out RCA jacks, the audio quality is bad. When one of the cables is removed or attached to either left or right out, sound quality is close to normal, but out of only half the speakers connected to my Home Theatre system. I have troubleshot the Yamaha Home Theatre receiver & other sources are fine. I also changed audio cables, & moved them to a different Audio In on the Yamaha. Same results. Thank you. Kevin Reynolds