Hi, I just upgraded the random collections of speakers I'd accumulated over the last five years for a nice shiny new KEF KHT 2005 package. These are powered by my Yamaha RXV795 amp. I did some initial setting up and everything seemed fine, watched a few programs (quietly...) then this afternoon I fired up the big jedi battle in star wars II (it was the first DVD to hand...) - when I crank up the volume my Amp is switching itself off. Does anyone have any pointers on what I'm doing wrong? I initially thought the impedance was set wrong but all the sats are 8ohm and thats the mode my amp is in - what else can cause the amp to behave like this? thanks, Andy C.