Hi ppl, I was playing the Dark knight this morn thru my LGBD390 connected to my Yamaha RXV2400 amp via analogue outputs. I selected multi ch on amp and began watching. Previously I set amp up with YAPO but then tweaked levels to listening point at 75db. Kef 2005.1 are being used. I turned volume to -10 and it was not over loud but seriously good. At the point of 31mins 40seconds it pans from joker snapping pool cue to a panning building scene, my speakers started to rattle badly. I checked crossover and reset to 100htz instead of 80htz, played again and still rattling. Even at 120htz sub crossover this still happened!! Any ideas?? If you need more info just ask?? Thanks guys