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In Reply to: RE: Need room treatment help posted by pdhanwada on September 03, 2010 at 20:31:22
1. I prefer corner sub placement too, but you need more bass traps than just two corners.
2. Open doors are good because that lets bass escape out of the room rather than be reflected back toward the listening position.
3. That sounds fine.
4. A rack that's centered on the front wall, and out of the direct path of sound from the speakers, should be fine.
I suggest that you plan for more absorption. The entire back wall will benefit from very thick absorbers, and so will the wall-ceiling and wall-floor corners.
--Ethan
Follow Ups:
Ethan,
Thanks for your reply.
1. I will be having superchunks bass absorbers on the three corner lengths except for the corner where door is. There will be superchunk behind the REL SUB in there. Or For the corner where the sub is I can create bass absorbers of 4 in thick until 3ft height and from there to roof I can have superchunks.
2.Is 2 in thick front wall panelling is enough.
3. Do you mean my whole back (12 X 9 )wall excluding door and super chunks portion needs to be covered by 4 in thick panelling. By doing so I will be treating 75% of both front and walls. Is it possible room becomming dead.
4. I may not have doors open all the time. Does low frequencies seep out of the room as the door thickness is 30 mm when closed.
5. I have projector screen comming down on the front wall. When doing two channel listening should I need to Send the projector screen up. Does the projector screen reflect, scatter, absorb or scatter.
Your help is appreciated again.
THanks
Pandu
2. Four inches thick is even better.
3. I'm not so concerned about the room becoming too dead. But if you think it is when you're done, you can cover portions not directly behind your head with very thin wood or glossy-painted cardboard. This absorbs bass, which is needed, but not mid and high frequencies.
4. How much bass leaks through a door depends on how thick and rigid the door is.
5. My projector screen has never been a problem. This may help: Front Wall Absorption
--Ethan
Ethan,
Thanks for your reply again. I went thru the article which talks about the front wall absorbtion.
If I understand correctly instead of treating front wall fully we can treat a portion of it. If needed you add absorbtion panels later.
This article seems to contradict the LEDE(LIVE END and Dead end) concept where Live end is the rear portion and Dead end is the Front wall portion.
I didnt understand the point when you say " I never had a problem with my projection screen."
My question related to projection screen is
1. Let us suppose I treat the wall behind the projection screen, Should I need to send the screen up for 2 channel listening.
If no is the answer then I assume the projection screen allows the sound to pass thru.
If yes is the answer then the projection screen either reflects the sound waves or diffuses it or scatters it.
Let me know what the projection screen does to the sound waves.
Thanks
pandu
Bass passes easily through a video screen. So bass trapping in the front corners, and on the front wall, is always useful. But if the screen is physically behind the speakers, and the rest of the room is treated well, there shouldn't be a problem with sound from the speakers even reaching the screen to create reflections.
--Ethan
Ethan,
Thanks for your help. I think That answers all my questions. I will start working on the room treatment soon.
Thanks
Pandu
Question is how much is enough and how much is too much.
Bass superchunks in the corners meaning they will become broadband absorbers. They should be working in the low range aswell as mid to high frequency range. In all we should be having
3 X 9 X 2 = 54 sqft of bass superchunks and absorbtion
3 X 4.5 X6 = 81 sqft of broadband absorbtin
1 X 4.5 X 9 = 40 sqft on the front wall
Total broad band absorbtion : 174 sqft
Area of four walls is 2 X 9 (17 + 12) = 522 sqft
In addition to these I have 30 to 40 sqft of doors and windows on which plywood is placed. They should reflect mid to high but they might let low frequencies out.
Thanks
pandu
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