Thanks for the information. I think I have some idea about preamp now.
Here is another question regarding projector screen.
Using Da-lite 106" (diagonal) fixed frame screen as an example, when I search for them on Amazon, most of the screens are $1k+, while on bhphotovideo.com, most of the screens are in $500-$700. I doubt that for the same product, the price difference will be this big. So I am assuming there must be some differences in the screens they are selling.
My questions regarding the screens:
1. What specs should I look at for screen? I know gain is one of them. Is a gain around 1.0 (or slightly above 1.0) the best for a HT with no (or maybe a little) ambient light? I have read projectorcentral.com and know something about screen gain and projector throw distance, etc.
2. What other spec should I look at for a projector screen?
3. What are the good brands? Da-lite?
4. What is a good place to buy the screen?