1. What is your opinion on this article
I didn't read the whole thing but the writer seems to understand the basic concepts. Which is more than I can say for most of the acoustic articles I see on the 'net!
2. I think your article is saying that you should have a mix of 703 and 705 to effectively absorb the high-mids
The exact density doesn't matter nearly as much as the thickness and placement (ie: corners, reflection points).
why does this article recommend 1 inch 703 instead of 4 inch 703 for the high absorber?
Agreed. Two inches thick is better, and four inches thick is better still.
3. The bass traps the remixmag article recommends seem to be the "tube traps" you mention. Your article and posts I've read in this forum seem to say that the two bass traps described in the remixmag article are not enough. Is that correct?
Right, you need to cover as much corner surface as possible. Most rooms have 12 corners. The more corner surface you cover with material at least four inches thick, the better.
4. Is this correct: 705 is to be used as a mid absorber and a broadband bass trap. To use it as a bass trap, place it in the corners. To use is as a mid absorber, hang it flat on the wall.
More or less.
5. The ceiling is pretty low. To make the room sound bigger, how much, and what parts of the ceiling do I need to cover with 705?
Reflection points matter most. And around the perimeter for bass trapping in the wall-ceiling corners.
6. Do I understand correctly that because of the size of the room, I should just try to make the room dead?
Yes, I think so.
I can find mineral wool with a density of 80 kg/m3 and 100 kg/m3, but not 96 kb/m3, which is the density of 705. Is it better to go with 80 or 100?
Either will work fine. The difference between 80, 96, and 100 is basically nothing.
--Ethan
