My stereo wav file render sounds great....my ac3 stereo render has less volume and generally less quality.

I've put nomalization to -31
my question is about the input filter selections.
I see there 2 compression boxes line and rf...
and the others at the top.

should I uncheck these to have the ac3 closer resemble the wav?
I know I am going down in quality from the conversion to ac3...just trying to keep as much as possible as I have pre processed audio with plugins on the master fader in vegas.

thanks
bb