Hey everybody, I'm new to this site and this is my first question. I own a Onkyo tx-ds939 a/v receiver. It cost me about 2,000 a few years back.Anyway it is a digital 5.1 surround. The questions is I want to install an extra pair of surround speakers and I was told that it would not hurt the receiver to plug in another pair of speaker to the back along with the orginal speaker leads that are aready there. I don't know if this means anything but I use the recever to only watch movies and I only use the receiver about once every 2 months or so. So it's not used much. i just wanted to know if this bad on the receiver. Thank you very much for your time.