I have a SB Xfi card running y connectors to the back of a Onkyo reievers 5.1 channel analog inputs. I have all the speakers connected correctly and for some odd reason, my sub simply doesnt work in ...

I am completely new to this, so please forgive me if this is an easier question. I have an old starter speaker/subwoofer system (KLH 520) and the way the system is set up (according to the KLH manual) ...