I bought a Sony Bravia BDVE300 5.1 1000W Home Theater system with 285 watts on Sub woofer. I had a 100W NexxTech ESDVD100 with 40W on subwoofer and it looks like my old 100W Home Theatre system gave me more thrill than the new more expensive one. Why is that?

I had the SONY system automatically setup sound setting with the supplied mic and it choose -4.0db for the subwoofer, should I up it to 5.0? The range is -6.0db to 6.0db

What should be db level setting for my front, center and rear speakers?