OK strange problem I hope someone can offer some advice. I recently upgraded my receiver to the model mentioned in the title. Everything works great except it doesn't feed any audio to my sub. I've tried using the audyssey setup and after completing it says no sub. I've tried manually setting up my speakers and telling it I have a sub and still no sound from it whatsoever. It is a powered sub hooked up to the correct input on the receiver. The sub worked fine on my previous Onkyo receiver but now I can get nothing from it. Sub seems to be fine, it gets power just no sound at all. I am driving myself crazy trying to troubleshoot it and nothing seems to work. I am considering buying another sub and seeing if it works to determine whether the receiver may have a problem. Anyone have any ideas that may help me to resolve this problem???