Ok hope I can get some ideas of whats going on. I own an Onkyo TX-NR1007 the Audessy configuration has been run for over a year now and it set the crossover to all my speakers at 60Hz. Tonight I was tinkering and changed them all to THX rated 80Hz. I use the Flight of the Phoenix crash scene as demo material alot. Typically I turn the volume to -15 to demo the scene and have no problems with it running with the cross over at 60Hz but after switching the crossover to 80Hz the reciever powers down during various points of the chapter???? but if I switch it back to 60Hz it works fine? I thought setting to higher cross over would be less demanding on it??