[ricardojoa]

I have read that diffuser needs space for them to diffuse the sound. So diffuser are not good for rear wall that is right against the listening sofa. I have a small room (12x20) with sofa right against the rear wall and im thinking, what if i install the diffuser above my head on the rear wall so that the diffused sound gets in the center of the room?
I am looking for difusser because i have read it can make the room sound larger.

[drummermitchell]

I'd check out Realtraps video with Doug Farraha(hearing is believing).
Its a real small room and even on my computer speakers it sound very nice.
They have it empty,then with traps and then with diffusors,quite interesting.
you can hear the difference each step they add or take away treatment .

[ricardojoa]

Thank you for the recommendation video. It is taking a hell to buffer..

[drummermitchell]

I usually pause it,go do something for 5 min and then it should be good without it trying to catch up.

[Rclark]

Well as you know I just put a fat diffuser in my small room, and am in the process we speak of building my last few skyline diffusers for a total of 4 of those.

It works great, just be mindful of the listening distance shown in the calculator. I took my big diffuser out of the room, listened for about 30 seconds and cringed. The diffuser immediately went back.

Yes, do it.

[Ethan Winer]

I have read that diffuser needs space for them to diffuse the sound. So diffuser are not good for rear wall that is right against the listening sofa.

Our Near type diffuser works well on a wall directly behind you. Besides the Hearing is Believing video Mitchell mentioned, our video All About Diffusion explains further about distances with various types of diffusers.

what if i install the diffuser above my head on the rear wall so that the diffused sound gets in the center of the room?

That might help people elsewhere in the room, but for you where you're seated, you need something behind your head to avoid the severe comb filtering that occurs directly in front of a reflecting wall.

--Ethan

[ricardojoa]

Thanks Ethan,
i like the video, very informative. There is a very distinct difference between absortive and difuser.

[Ethan Winer]

I usually pause it, go do something for 5 min and then it should be good without it trying to catch up.

I meant to address this yesterday. Is this a problem only with videos you stream from RealTraps? We have a dedicated server that is very fast, and I've never seen videos on our site stream slowly. But if some people are having a problem, I need to know that.

--Ethan

[ricardojoa]

The video about diffusion was very slow. I actually went to sleep And i never had any problems with others video i play on othe other sites.

[DTB300]

I meant to address this yesterday. Is this a problem only with videos you stream from RealTraps? We have a dedicated server that is very fast, and I've never seen videos on our site stream slowly. But if some people are having a problem, I need to know that.

Just watched your Diffusion video and while it played it continued to download way ahead of the play point.

So no issues for me.

[ricardojoa]

Does anyone have any word on qrd diffuser on first refection point?
I have a 12x20 feet size room but i only use only haft of it. The listening position is not symmetrical and the speakers are on the long wall. I want to make things sound a little more open and with the felling of a bigger room. Would qrd diffuser work on first reflection point? They would have enough distance to the listening spot but how far should they be from the speakers?
Any help would be appreciated.

[doctorcilantro]

I meant to address this yesterday. Is this a problem only with videos you stream from RealTraps? We have a dedicated server that is very fast, and I've never seen videos on our site stream slowly. But if some people are having a problem, I need to know that.

--Ethan

Videos were great here on a rather slow 4mbps down connection from the Middle East!

ETHAN - you say something interesting about 2D on the back wall, that it can be seen as a waste to reflect that energy up/down l/r.

I'm in a position, after hearing your video samples, where I am reconsidering diffusion on the back wall - 13 feet behind listening position and starting about 7 feet up on the wall. Anyway, I can post elsewhere about that but curious about the comment.

[Ethan Winer]

Videos were great here on a rather slow 4mbps down connection from the Middle East!

Great. Our server is usually super fast, but I'm always concerned when someone has a problem they don't also have with YouTube.

I am reconsidering diffusion on the back wall - 13 feet behind listening position and starting about 7 feet up on the wall.

Diffusion on the rear wall is usually centered vertically at ear height. The farther away that wall is from you, the larger an area you need to cover. Now, a diffuser anywhere in the rear should make the room sound larger. But I think starting at seven feet high and going up from there seems a bit too high to be worthwhile.

--Ethan

[Ethan Winer]

Does anyone have any word on qrd diffuser on first refection point?

When I tried that I thought the sound was noticeable worse than with absorption. Some people say they like diffusion at reflection points, so all I can say is it didn't work for me. Maybe in a very large room it would be okay.

--Ethan

[Guy 13]

Hi all Audio Circle members.
This post will not in anyway take away any business from Mr. Ethan Winer, because the product I will be talking about is made in Vietnam for the Vietnamese and the seller (Dung Audio) will not export it.
Today I went with my wife to a small store (More or less a Cavern of Alibaba) where they have all sorts of audio parts, look like a candy store where the capacitors, resistors, small knobs and the same are all in small plastic bottles, some on shelves, some hanging from ropes from the ceiling.
But what was the most interesting was some Styrofoam diffuser about 24 X 24” molded in one single bloc, not made with small cut out parts.
The price 170,000 dollars, Vietnamese dollars of course, which in real money is 7.90 USD each.
I am seriously thinking of buying maybe a dozen of those and bring them back with me in Canada.
They are big, but light weight.
I will see if I have room in my boxes to will follow me to Canada.
Sorry no pictures, but I am sure you can imagine what they look like.
Styrofoam can be spray painted, right?
Just wanted to share with all of you my finding, even if I cannot share with you my good luck.

Guy 13
Additional information and pictures.

I just found some pictures of the Made in Vietnam diffusers that I mentioned above.
There are molded in one block.
I will buy a few of those and try them in my all concrete walls and ceiling and ceramic floor listening room here in Vietnam..









   
 
 

[ricardojoa]

When I tried that I thought the sound was noticeable worse than with absorption. Some people say they like diffusion at reflection points, so all I can say is it didn't work for me. Maybe in a very large room it would be okay.

--Ethan

Thanks Ethan for your suggestions.

[DTB300]

When I tried that I thought the sound was noticeable worse than with absorption. Some people say they like diffusion at reflection points, so all I can say is it didn't work for me. Maybe in a very large room it would be okay.

+1 here for me for absorption at 1st reflection instead of diffusion - and I tried both QRD and RPG BAD panels (Flat and Curve)

[etcarroll]

I too am interested in discussion of 'working to improve' the sound in an irregular room shape.

My house is open on first floor, the kitchen, eating area and family room, where my system is, is a long rectangle. So my speakers are at end of long wall, shooting across and in front of short wall. So left speaker is almost in corner formed by the 2 walls, while right speaker has no 'wall' to it's right, so I'm stumped on treating the right speaker.

Does anyone have any word on qrd diffuser on first refection point?
I have a 12x20 feet size room but i only use only haft of it. The listening position is not symmetrical and the speakers are on the long wall. I want to make things sound a little more open and with the felling of a bigger room. Would qrd diffuser work on first reflection point? They would have enough distance to the listening spot but how far should they be from the speakers?
Any help would be appreciated.

[srlaudio]

All I can say is that I have heard from both audiophiles as well as professionals that they like our diffusers on the side walls.  So who is right?  No one I suppose, since all we have is subjective data......  Here is a photo of our large diffusers (wi Ethan's traps horizontally on top) installed at the early reflection points.  (thanks to woodsyi)

[dsrviola]

Hi all Audio Circle members.
This post will not in anyway take away any business from Mr. Ethan Winer
   
 
 

It was my understanding that this wasn't a commercial/industry forum, so that shouldn't that be a non-issue?  http://www.audiocircle.com/index.php?topic=71021.0