Just had some questions and concerns regarding my speakers. Here is my system btw... Sony HT-DDW740 1.) Is it better, using the receiver, to set your speakers to +db levels or -db levels? Like for instance my Fronts are set to +0, my center is set to +5, and my rears are set to +8. My master volume is usually around 40-42 for most movies. Are you supposed to use -db levels? 2.) Which brings me to my second question? Are you suppose to set the center speaker higher than the normal front left/right speakers, or should they all be the same...or lower? Right now I have 0-5-0 3.) Also, to actually adjust the levels of the left/right front speakers you actually have to use the bass/tremble to do it, correct? Is it safe doing that? I would think the setup is designed so that the sub is supposed to do all the work for a set system like this. 4.) Lastly, at what point should I be worried about damaging my speakers? Is +8 on my rears too much for a system like this to handle? Thanks, any help is greatly appreciated.