I have the 950/770 combo and I am running the Polks RTI12's. I am not using my 6 and 7 channels, so I used those channels to double the power on the mains (400 watts per speaker). I used the y-splitter on the processor inputs for the left and right fronts. My question, is there a way to check to see if I am correctly getting all 400 watts per speaker. I can hear a diff. but I just want to be certain that everything is fine.