QUOTE(peter32 @ Aug 10 2010, 06:52 PM)
Just read your message.
After installing, I actually can insulate my hifi noise away from my neighbours, and their Majong noise away from me

Seriously !
For sound insulation, I suggest that you may want to know this fact: Best sound insulation is vacuum, followed by air, then liquid, last is solid substance.
Since you can't create a vacuum, second best is to create a layer of still air, as suggested by Pierreye. Create a airwall helps a lot, as in double glazing windows. Using rockwool actually generate a layer of air-filled layer that hindered noise passing from one surface to another. So the thicker it is, the better the sound insulation.
Why don't you consider putting either foam on your wall if you just want to insulate your specific hifi room, and paste on some sound insulation material as in this (
Click the forsale link here )for your acoustic treatment?
I did not use foam because my wall is in the sitting room. My wife will kill me then fed my body to the dogs if I do that.
dog food eh..lol. sitting room? as in living den? by placing foam padding on the walls, can't you use partition to cover them up? or it's suppose to be exposed?
As for the window part, I have a double glass door that leads out to a little balcony. which i would be covering it with a blackout curtain. thick and heavy.
QUOTE(yonggoh @ Aug 11 2010, 12:14 PM)
u running 120" from 13 feet viewing distance!?!??!

u must be one of those guys that like to sit in the front row in the cinema!

anyways...awesome set up!
I was reading up online and some sites recommend a maximum of 13' viewing distance for 120" screen to get full experience of THX.