I bought the Onkyo HT-R640 5.1 receiver and speaker set in late 2006. It worked virtually without issues for nearly 12 years until this month when the receiver kept switching inputs on its own. If I ...

Decided to get my feet wet in HT before getting a pricey system when I move out in the future. I have a few setup questions.<br><br>1. There are 3 sub modes on the reciever.<br>-A."Low freq from all ...