So, here's the story. I have a ps3 and i would like to use my 6-7 yr old Sony DAV-S500 Home theater system. So i dug it out and i found it could be hooked up using a optical cable. Anyways, i noticed that at lower volumes, there was speaker hiss. I am unsure if it is only the left speaker or something but there is some speaker hiss that is inaudible once you crank up the volume but in quiet parts of a CD, i was able to hear the hiss. Does anyone have clues as to what may be causing this hiss?I would love to just replace the receiver but then my speakers wold be useless as well because sony uses proprietary speaker connection and not willing to splice some standard connectors onto them.