In the past week I've replaced my amp (Yamaha 1900 replacing an A2) and centre speaker (Kef iQ60c replacing a Q95c). The front and rear speakers in my 5.1 set up are Kef Q55 and 60s respectively. Since I've bought the replacements, I've noticed that the dialogue sounds a bit muddy ie. it doesn't sound loud enough compared to rest of the sound mix, and it lacks depth. I've run the YPAO set up on the amp and have gone through the various DSP options, and none of them have solved the problem. Is this being caused by the fact that my new centre speaker needs to be run in for a longer period?