Originally Posted by harrisu
Yeah but this means that I have to buy all these and then install and then try and if I don't like it, I'm left with a lot of stuff. I'm sure there are some rules/theories that majority agrees upon to start with? Like, may be a way to use REW to know how dead my room is???? I don't know how to interpret RT60 but I think it is supposed to show how alive room is. Don't know if its applicable to room of my size because someone mentioned that the graph is useful only for large rooms.
Yeah I wouldn't want the smear the sound. Before I made all the changes, I removed everything from room and when I played some music, it did sound better when I didn't have anything (no absorbtion) on back wall corners. If I put the absorption panel there, it does feel like it was absorbing more than I needed to.
I think first, I'll remove the Linacoustic from front wall cause its just absorbing everything and then try out.
One of my concern is that I feel like I don't have absorption in balance. Front wall is completely dead, back wall is 100% starting from ear level and going 4 feet up, side wall has one one panel on each side on 2nd reflection and I have 4 panels on top. The reason I didn't install more panels on side wall is because many owners of my speaker (JBL 4722n) said that it sounds great when first reflection is not absorbed. So I left that open by just having one panel on 2nd reflection. But you can see that my room is unbalanced where at one place too much absorption and one place almost nothing.
So I've really been playing around with acoustic treatment over the past two months, moving them, stacking them (for lower freq absorption), and a loooot of listening. I have a 7.2.4 setup, with a 120" AT screen. Here's what I've learned, and maybe this will help in some kind of way.
1. Only absorb the whole front wall if you have an AT screen. Otherwise, I don't like the sound. I use 1" lin, plastic membrane, 1" lin (Thanks BIG!). I love the sound of this, because less SBIR (speaker boundary effect), great speaker localization, and great bass trapping.
2. Make sure both side walls have equal amount of absorption, and at the same height and distance. In other words, symmetrical. Otherwise, I can hear the difference. My side walls are covered about 40%.
3. I like the back wall about 50% covered with absorption. I hear this difference in the dialogue.
4. I use 3" rock wool at first reflection points, and 2" almost everywhere else.
5. Ceiling clouds, I have not tried, but I want to try the at the first reflection point on ceiling.
6. With the amount of absorption I just mentioned, the amount of power you need to reach the same SPL is greater. Meaning that if you'd regularly play movies at 60% of the receiver/amp capability, you'll need to run it at 75%. But that sound will be way more clean and linear.
7. I have not used REW yet. I have the app, but no mic. I would love to measure my room. Decay times, etc. But to my ears, this is the best my room has sounded.
What do you guys think?