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Post by rowmat on Mar 28, 2017 18:55:34 GMT -6
For the rear wall of the control room. Fortunately my studio partner and his father are building most of this. I gave them the choice of assembling a truckload of ELCO's or building the diffuser and they chose the diffuser!  |
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Post by johneppstein on Mar 28, 2017 23:16:58 GMT -6
For the rear wall of the control room. Fortunately my studio partner and his father are building most of this. I gave them the choice of assembling a truckload of ELCO's or building the diffuser and they chose the diffuser! Can't say as I blame them. Looks nice - I'm a big fan of "skyline" diffusors. |
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Post by winetree on Mar 28, 2017 23:31:40 GMT -6
I've built a few of these.
I found a local builder who sells a 2' x 2' for a $100.
I need 10 of them. I'm thinking it's easier to just buy them.
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Post by kcatthedog on Mar 29, 2017 4:15:49 GMT -6
That is a reasonable price for the labor alone !
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Post by rowmat on Mar 29, 2017 11:56:31 GMT -6
I've built a few of these. I found a local builder who sells a 2' x 2' for a $100. I need 10 of them. I'm thinking it's easier to just buy them. He must be on crack... or crazy! |
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Post by winetree on Mar 29, 2017 12:19:04 GMT -6
I've built a few of these. I found a local builder who sells a 2' x 2' for a $100. I need 10 of them. I'm thinking it's easier to just buy them. He must be on crack... or crazy! I doubt it. He has a wood working shop and makes batches of them. The $100. each is based on buying 10 units, cash and local pickup. I bought 8 - 18" X 18" name brand wood diffusers for $25.00 each, delivered, off the local craigslist. There bargains out there. |
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Post by rowmat on Mar 29, 2017 23:39:54 GMT -6
They finished building it yesterday and I went to the workshop this morning and checked it out. It's a heavy bastard for sure as I knew it would be but I think it even surprised them. Probably a six person job to lift it. They're currently reevaluating the mounting method with a view to additional reinforcement. I kind of figured that would be the outcome as I was having trouble convincing them just how heavy it was going to be. They know now!  |
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Post by kcatthedog on Mar 30, 2017 3:19:39 GMT -6
I keep waiting for someone to now just make a mold and then make plastic copies, that are lightweight.
as diffusers are largely simply reflecting sound, I think they are made of wood just to keep cost down and to ease of fabrication ?
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ericn
Temp
Balance Engineer
Posts: 14,892 
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Post by ericn on Mar 30, 2017 10:46:52 GMT -6
I keep waiting for someone to now just make a mold and then make plastic copies, that are lightweight. as diffusers are largely simply reflecting sound, I think they are made of wood just to keep cost down and to ease of fabrication ? Molded plastic diffusers have been around for years, they still aren't cheap! Small run's large scale thermal molding isn't as cheap as you think. Also if I remember correctly they are pretty limited in how low they can work. |
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Post by rowmat on Apr 1, 2017 17:36:23 GMT -6
Test hanging the diffuser...  |
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Post by rocinante on Apr 2, 2017 0:12:11 GMT -6
That's some good work. Looks great.
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Post by jcoutu1 on Apr 2, 2017 5:06:51 GMT -6
rowmat. Looks great. Massive. How big is it?
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Post by rowmat on Apr 2, 2017 5:23:05 GMT -6
rowmat . Looks great. Massive. How big is it? 161 cm x 87.5 cm or about 5'4" wide x 2'11" high. They did a great job. I helped on day one and then went back to assembling ELCO's. Next thing is more DIY tube traps. |
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Post by Johnkenn on Apr 2, 2017 10:38:17 GMT -6
That looks fantastic. I built a 2x2 of this and it was a PAIN IN THE ASS...of course, I did it with a circular saw. Probably go 5 times faster with a miter saw.
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Post by rowmat on Apr 2, 2017 11:37:49 GMT -6
That looks fantastic. I built a 2x2 of this and it was a PAIN IN THE ASS...of course, I did it with a circular saw. Probably go 5 times faster with a miter saw. A mitre saw was indeed used. We sourced the pine from a timber supplier my studio partner's dad has an account with and had it milled to exactly 35mm square (1 3/8") There were 1151 pine blocks totalling 143 metres in length (470 feet) glued to a 3/4" plywood backing board. |
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ericn
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Post by ericn on Apr 2, 2017 15:31:43 GMT -6
That looks fantastic. I built a 2x2 of this and it was a PAIN IN THE ASS...of course, I did it with a circular saw. Probably go 5 times faster with a miter saw. A mitre saw was indeed used. We sourced the pine from a timber supplier my studio partner's dad has an account with and had it milled to exactly 35mm square (1 3/8") There were 1151 pine blocks totalling 143 metres in length (470 feet) glued to a 3/4" plywood backing board. How much dose it weigh? One trick is to drill out the back of each block to reduce the weight! |
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Post by rowmat on Apr 2, 2017 15:35:19 GMT -6
A mitre saw was indeed used. We sourced the pine from a timber supplier my studio partner's dad has an account with and had it milled to exactly 35mm square (1 3/8") There were 1151 pine blocks totalling 143 metres in length (470 feet) glued to a 3/4" plywood backing board. How much dose it weigh? One trick is to drill out the back of each block to reduce the weight! Around 120 KGS (265 lbs) |
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ericn
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Balance Engineer
Posts: 14,892
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Post by ericn on Apr 2, 2017 15:46:53 GMT -6
How much dose it weigh? One trick is to drill out the back of each block to reduce the weight! Around 120 KGS (265 lbs) Yeah that's why we started drilling them! |
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Post by rowmat on Apr 2, 2017 18:45:42 GMT -6
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Post by jcoutu1 on Apr 2, 2017 18:53:34 GMT -6
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Post by rowmat on Apr 2, 2017 20:40:28 GMT -6
Still needs finishing off along with plenty more control room treatment especially trapping. Our control room has been a crap shoot for too long! |
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Post by maq3396 on Apr 18, 2017 23:05:59 GMT -6
Great job!
Would these still work if they were made from plastic
Is the pattern completely random or is there a sequence ti it?
Thanks
Mac
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Post by rowmat on Apr 19, 2017 0:11:33 GMT -6
Great job! Would these still work if they were made from plastic Is the pattern completely random or is there a sequence ti it? Thanks Mac It's a calculated sequence designed to diffuse as evenly as possible over the target frequency range. It was built from plans. Plastic would probably not work as well at the lower end of the frequency spectrum (lower mids) as I would think some energy would pass through the plastic and reflect back from the mounting board with less scattering than the wood. |
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Post by maq3396 on Apr 19, 2017 5:00:45 GMT -6
What was the frequency range that you made this one for?
It would be easy to 3D print these....Although may not be as effective if plastic is not the optimal material.
There are hybrid filaments out there that have wood, carbon, metal etc in them although they are more expensive.
Alternatively you could print a mold and pour something into it.
Would a silicone or polyurethane material work?
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Post by rowmat on Apr 19, 2017 5:55:33 GMT -6
What was the frequency range that you made this one for? It would be easy to 3D print these....Although may not be as effective if plastic is not the optimal material. There are hybrid filaments out there that have wood, carbon, metal etc in them although they are more expensive. Alternatively you could print a mold and pour something into it. Would a silicone or polyurethane material work? 689hz to 4.9khz. These type of diffusers predominantly cover the midrange. The maximum well depth determines the lower cutoff frequency while the block/well width determines the high frequency cutoff. Other material could be used but the density will obviously have some effect especially if it is very lightweight. I'm pretty sure pre-made moulded plastic versions are available but they seem to be mostly in smaller 2'x2' sizes from what I have seen. RPG manufacturer a polystyrene version... www.rpgeurope.com/products/product/skyline.html |
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