Originally Posted by SonyHome
Very nice HT you built. I'm hoping for the same but I think I have very long and hard road ahead of me due to my lack of knowledge about this stuff.
I have some beginner question I'm hoping you'll help with.
Looking through your thread I noticed that you filled your stage with sand. What is the purpose of that?
The sand does a couple things. It fills the void of the stage, so your stage does not become a bass drum, and it adds mass to the stage. Since the sub is sitting of the stage it prevent the sub from vibrating the stage when it is thumping.
What is the green glue for?
It is a viscoelastic dampening compound that reduces sound transmission from one surface to the next. It is one part of overall scheme to reduce noise entering or exiting the theater. Look here.
I'm thinking of building a HT in 14.5' wide x 16' long x 8' high basement with no windows and two of the walls are made out of poured concrete. Do I need to fill the stage with Sand? I thought the stage is only for looks but does it serve other purpose?
Yes, fill the stage with sand as described above.
Also how do you determine what is maximum size screen I can have in my HT? I'm thinking of getting Sony VPL-HW10 but not sure if this is the right one since I've never owned front projector before.
Screen size is related to viewing distance, film format (16x9 vs 2.40:1), projector capabilities, room size, and personal preference. Play around with this calculator
. There are other calculators/accepted ratios for evaluating viewing distance... one being the 1st row should be about the same distance from the screen as the screen is wide (but this is subjective).
Hope this helps some. Good luck with your project.