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PostPosted: Tue Jan 24, 2017 7:48 pm 
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Location: Peachland, BC, CA
Hello members, Half way thru the build of my new sound room at the back of a garage. The room is 11ft x 20 ft with a sloped ceiling that is about 11 ft at one end and 14 ft at the other. The speakers will be about 3 ft from the front wall and 2 ft from sides. In my last room I built acoustic panels for the first reflection pts and bass traps out of Roxul Comfortboard which were 1.5 inches thick,2 x4 size. I can get a good price on the 2 inch Comfortboard and do the same or what about the Roxul batts. I would be framing whatever I use. Also wonder whether I will need some panels suspended from the high ceiling. I am using Sonus Faber floorstanders powered by. Moon 600i int amp. I know experimentation is necessary but looking for opinions. Thanks


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PostPosted: Wed Jan 25, 2017 5:28 am 
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Location: Athabasca, AB, CA
why only 1'5" thick
That might be ok for first reflections but for bass trapping at a minimum I would think at least 4" thick(straddling corners).
You could double them up.
Can't see 1.5" insulation doing much at all for the lower end control.
On gearslutz site under bass trapping/studio acoustics there is a lot of info there.
Looks like your room is a nice size :D .


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PostPosted: Wed Jan 25, 2017 5:37 am 
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Drummermitchell is 100% correct. Broadband traps for reflection control should have 3-4" thick insulation ideally mounted in a 5-6" deep frame that allows for an air gap between the fibrous batting and the wall behind. This will provide uniform absorption of the entire mid band through high frequencies completely knocking down those pesky reflections. Canisbay your 1-1/2" traps will only absorb high frequencies dulling your room sound like all those terrible cheap "acoustic" foam wedge products.

When folks tell cautionary tales of having "over-damped" their listening room, sucking the life out of it by using too much acoustic absorption, the root cause is almost always that the treatments they used were not thick enough to be broadband absorbers.

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PostPosted: Wed Jan 25, 2017 5:54 am 
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Location: London, ON, CA
What about using Acoustic Fields "Free" room analysis?
Watch the video? You may have to send pictures.

I think this guy knows what he is doing using science and experience.
I am sure a sales pitch is there somewhere, but I think he will have some really valid points about your room in particular.
It may save you some time and money experimenting.

Take care old friend,
P

http://www.acousticfields.com/free-room-analysis/

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PostPosted: Wed Jan 25, 2017 8:00 am 
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Location: Peachland, BC, CA
Thanks Pierre, I will check out that video. I have seen others as well. I should have mentioned that my plan was to double up the panels for the corner bass traps. This is what I did last room. For the first reflection pts one panel I thought would be sufficient??? The other question was about the sloped ceiling with the height. Any comments about treatment there.


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PostPosted: Wed Jan 25, 2017 9:09 am 
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Location: London, ON, CA
Rick - I'm sure Dennis Foley can help you to answer that question about the sloped ceiling,... I have no experience in that regard.
I'm thinking with going thru with the free room analysis, including the sloped ceiling, you will get some suggestions from him of what he would do. I know you would like to DIY, so hopefully his suggestions will help with placement and type of units you could make to help with the sound quality in your room.

P

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PostPosted: Wed Jan 25, 2017 4:14 pm 
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Location: CAMBRIDGE, ON, CA
Anyone know do the foam corner bass traps work at all?

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PostPosted: Wed Jan 25, 2017 4:32 pm 
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The comfortboard is denser and will likely trap lower frequencies better (if comparing 1.5-3 inches of either in the same location).

I used 3 inches of comfortboard as the face of bass trap (2x4 panel straddles corner) and then filled in behind the trap with safe n sound in garbage bags.

For wall mounted broadband traps some say that the panels should be flush with the wall, some say that a gap is fine. I hung mine with a gap. I see evidence of both approaches in other setups, and in reading online.

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PostPosted: Wed Jan 25, 2017 5:36 pm 
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Location: Surrey , BC, CA
for the bass traps read what "asagaai" is saying......https://www.gearslutz.com/board/high-en ... -trap.html


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