I've got a Sony STR-DB830 and Mission 78C centre and 781 front speakers. I have noticed for a while that on some films, eg. The World is Not Enough, I struggle to hear the dialogue from the centre channel but if I turn the volume up so that when people are speaking it sounds clear and at a reasonable volume, it wakes up the whole street if there is an explosion or someone firing a gun it's unbelievably loud, too loud in fact, which means I end up struggling to hear most of the film for fear of bursting my ear drums when an unexpected blast occurs! I've tried turning my centre channel up to full volume on the test tone, but it doesn't make any difference. I like films to be loud but there isn't such a stark contrast when watching a film at the cinema. Is it my system or is it just the way DVD's are? At the moment I'm powering my centre channel with the Sony but it will soon be powered by an Arcam 10p becuase I've just sent it away to be upgraded. Just wondered if anyone else has trouble hearing the dialogue in films or am I just going deaf!