The onkyo TX-NR818 specifies 135W/channel into 8 ohms with 2 channels driven.* I specifically asked what the max power per channel would be with 5 channels driven and 7 channels driven would be.* The replied and specifically stated
"The TX-NR818 is rated at 135 per channel at 8 ohms. That rating will be the same with 5 channel and 7 channel driven which is 135 per channel at 8 ohms with 5 and 7 channels driven."
Im not sure I totally believe that.* I thought all AV recievers derated their outputs with more channels driven.* I amost tempted to power each channel in whole house mode into 8 ohm power loads and measuring the power directly.* If its true that each channel is putting out 135 real watts max, then there would be a benfit of biamping vs powering with only 1 135W channel. if thats really the case.* Any thoughts?