djashjones Wrote:i would not risk it. Talk to Onkyo about it. The system is designed for 6 ohms. Most dedicated amps can handle various impedance. The output power also varies accordly. So on a amp 4ohms could be 100W but using 8ohms will only give you 75W.It's should be fine for 6 ohm to 8 ohm speakers but you just don't have as much power (volume may be lower) as the 6 ohm. An AVR designed to deliver maximum output to a 6 ohm load can safely drive an 8 ohm one. But it will not be able to maximize its maximum power.
Talk to Onkyo. It could invalidate your warrenty!
I installed a similar speakers to this in my previous home for 5 years, and the AVR and speakers fine.