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Discussion Starter #21
Thank you , i did some measurements already on some spots with the basstraps i have, and it does help. I just still got a question left concerning the equilateral triangle. I was just wondering how importand it is to stick on this rule when it comes to the width ( speaker to speaker) the thing is that i can get some pretty good results when the width is at a diffrent length. Also just for wanting to know how it works, how much and what does affect the width when talking about an equilateral triangle?. The same distance to the walls and the same distance to the listening postion already covers the speed and the frequentie response i would think.
 

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Equilateral is just a starting point. No problem being inside or outside of it. Just a different presentation.
 

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Discussion Starter #24
Im planning to treat the room a.s.a.p, but i dont want to invest more then necessary. What would you suggest ? If you look at the last photo you can see the front wall, it now exist only of a big carpet. Would you suggest treating the whole carpet (even behind the tv and the bottum) and what about above it ? what is your experiencie in what areas it is most effective ?
 

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Something pretty thick on the rear - at least 6" and at least 2 2x4' panels.

For your side walls you'll want more surface area and thicker. Again 2 2x4's each side and at least 4" thick with a bit of a gap behind them.
 

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Discussion Starter #26
Hi, im back for more questions :grin2:.

That it is no problem getting inside or outside the Equilateral triangle was realy helpful
This way i have bin getting much better results and after doing some minor changes with EQ it looks pretty good i think(frequentie response is taken at (1/48 smoothing)

all though the angles in my setup are looking quite extreme. (check photo's)


Annyway my question is about the room acoustics, you suggested to get pretty thick panels' but does this still aply the same way now my frequencie response is okay ? You can check the photo's for my waterfall graph for more in depth info. I'd also like to know how to read this or better said "What is genneraly accaptable"? so i know how to meassure/read the graph.
 

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Your decay time is still very long all the way through the range. I would do the thicker corner traps and on the rear wall and ceiling. The side walls you could probably get by with a little thinner.
 

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Discussion Starter #28
Thanks!

My ceiling is kindof triangler shaped (you can see it at the photos in my first post. ) How would you go about that ? Is there a way to know where to place it ? like the mirror technique for the side walls for example? or would this be more of an trial and error thing ?
 

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Discussion Starter #30
Great!, last question, how big and thick would you suggest for the ceiling as we didnt discuss this in the other post where you named all the dimensions. again 2 2x4's ?
 

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Discussion Starter #33
Hi again , Im doubting between doing the whole ceiling with 6 inch glasswool or doing it with the 2 panels you described. Would treating the whole ceiling kill to much of the space ? or would it be a good thing ? i am not sure in this case. What is your experience with this types of ceilings if i may ask?
 

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I wouldn't kill the whole ceiling. Actually 4" with a 4" gap is as good or better than a 6" panel flush with the surface.
 

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Discussion Starter #35
Great, good to know. Your talking about the whole ceiling surface with 4 inch gaps between them right ? Becouse we talked about 2 panels for the ceiling with the mirror trick before this..
 

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Yes - just cover the reflection zone - not the whole ceiling.
 

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Discussion Starter #37
Okay thank you, i was also asking about the panel flush because i forgot to mention there is no proper isolation at this moment. It might look like it on the photos but its actually not doing much, behind the grey surface you can see on the photo's is just wood. This is still no issue now i mentioned it?
this whole project has bin a bit delayed but today i'm finally gonna buy all the stuff i need so i thought lets double check just to be sure.

Front wall : 4”-6”. ( x 2 )
Rear wall : 6” ( x 2 )
Side walls : 4” with a bit of gap behind it ( x 2 )
Ceiling : 4” with 4” gap ( x 2 )

So this is a summary of what you advised me to get. Only at the ceiling and side walls
you talked about “gaps”. For the side walls a bit of gap and for the ceiling a 4 inch gap.
This is just to get more out of it right ? so it also will absorb more bass frequencies ?
Shouldn't i then do all of them ? or do the front and rear wall don’t need the gaps somehow ?

I'm planning to do them all 6 inch to be sure. The only thing is when doing all the 6 inch panels with 4 inch gaps i get 10 inch thick panels, that's kind of huge, that won't even fit behind my TV on the front wall without changing my listening position. Also is it still effective if the tv is in front of the panels ? the tv(50”) is already a reflective surface of it self i can imagine.


For the ceiling i will be using the mirror technique but what about the front and the back ?
is there a rule about where to place them ?


For the sidewalls you talked about 2 panels on each side. But with the mirror technique i will only find one reflective zone, so where then should i place the second ?.


And final question : How important is it the panels are 2x4' ? I can get rockwool at sizes of 100 cm by 61 cm (15 inch thick) for way much cheaper then the 2x4.
 

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4" on the front wall is fine. No need for 6" and 4" gap. 6" with a couple inch gap on the rear wall. The rest, 4 and 4 is fine.
 

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Discussion Starter #39
Oke, it won't even matter if i use 4 or 6 inch for the rest :O ?


So how can i find the second spot for the side panels ? i can only find 1 with the mirror trick
Im also asking because there might not be enough space for another panel next to it (depending on how for away from each other) because there's a window on one side prettu close next to the reflection point and a door on the other side.

And where to place the panels on the rear and the front ? Is there a rule on where to place them ?

And how important is it the panels are 2x4' ? I can get rock-wool at sizes of 100 cm by 61 cm (15 inch thick) for way much cheaper then the 2x4. in ft that would be 3.3'x2'. I can still make it work by cutting them of course if it will really make a big difference.
 

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In the reflection zone the more surface area the better. 6" for behind you and any corners and 4" for the rest. Make the 2nd panel smaller if needed to fit with the window interference. Find the 2nd point the same way you did the first - just have someone keep moving the mirror closer to you til you see the opposite speaker.

Reflection Point Video - http://www.gikacoustics.com/video-early-first-reflection-points/
 
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