I am going to ask some dumb questions, but please bear with me. I have a Philips plasma that lately the speakers are rattling on some broadcasts. I know they are simple, nothing speakers, but they have worked OK. I am not into real high quality sound. I know my 622 reciever has an optic audio output and I wanted to know what I would need to use this. Do I need a reciever that has this optic input? I do have a nice pair of Boston acoustics that I could use. They have been in a closet for a few years. I no longer listen to music in the house like I use to so these items have been put away. I have a older, probably 10-15 year old, Yamaha reciever that does have different channels such as Theater, Concert Hall, etc. All of the speaker connections are for wire and not for RCA type plugs. Is there a web site I could go to to gain more knowledge? I just want some decent quality sound and don't need a big bucks type system. Thanks