Can someone tell me if my AVR-300 will support driving both 8 ohm and 4 ohm speakers simultaneously? I am looking at purchasing rear surrounds that are 4 ohm as compared to my 8 ohm speakers. These rear surround speakers are from the same company and are the same model that I currently have... This is why I'm curious if I set the receiver to 4 ohm speakers if it would drive both - and not end up with any problems. Thanks in advance.