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planet10
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simon
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 Posted: Sun Apr 25, 2010 8:46 am Post subject: |
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| Jorge.ar wrote: | Also I can get another type but dont know the english word. in spanish it's called "aglomerado" (please do a google image search, I cant post links because I'm a new user and I'm not allowed yet  |
Hola Jorge. If this is the stuff http://www.syplac.com/imagenes/aglomerado_desnudo.jpg then we call it chipboard. The better grades are pretty good for speakers, particularly furniture grade which is quite dense. Maybe not as good as good birch ply, but probably better than mdf. Others here know far more than me and can probably advise better. |
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pre65
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| Posted: Sun Apr 25, 2010 8:56 am Post subject: |
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There would seem to be merit in using an MDF + chipboard combination as in what Peter Comeau now does with the World Designs speaker cabinets.
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Scottmoose
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| Posted: Sun Apr 25, 2010 10:41 am Post subject: |
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Well, it's cheap, which is a major consideration for commercial companies, & should have slightly improved self-damping compared to a single equivalent thickness of MDF.
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Jorge.ar
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| Posted: Mon Apr 26, 2010 1:34 pm Post subject: |
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| planet10 wrote: | Fiberglass?
Can you get plastic laminates? (Formica, Aborite...)
What thicknesses do the MDF and ply come in? 9mm? thinner?
dave |
I never used fiberglass, I will see if I can get.
MDF is available in two kinds, standard and "first quality": HAYA (Fagus sylvatica, I think in english is European Beech http://en.wikipedia.org/wiki/Fagus_sylvatica)
and I can get it in
3mm
5,5mm
9mm
12mm
15mm
18mm
the same for Chipwood.
I also can get laminated MDF, laminated chipwood and I think I've seen sometimes laminated plywood
laminated chipwood is the easiest to find.
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Jorge.ar
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| Posted: Mon Apr 26, 2010 1:35 pm Post subject: |
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| simon wrote: | | Jorge.ar wrote: | | Also I can get another type but dont know the english word. in spanish it's called "aglomerado" (please do a google image search, I cant post links because I'm a new user and I'm not allowed yet |
Hola Jorge. If this is the stuff http://www.syplac.com/imagenes/aglomerado_desnudo.jpg then we call it chipboard. The better grades are pretty good for speakers, particularly furniture grade which is quite dense. Maybe not as good as good birch ply, but probably better than mdf. Others here know far more than me and can probably advise better. |
thanks simon!!
There are lot of furniture made with this, like "build it yourself", I can easy get this kind of chipwood. |
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Jorge.ar
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Joined: 22 Apr 2010
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| Posted: Mon Apr 26, 2010 1:39 pm Post subject: |
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| pre65 wrote: | | There would seem to be merit in using an MDF + chipboard combination as in what Peter Comeau now does with the World Designs speaker cabinets. |
| Quote: | | Well, it's cheap, which is a major consideration for commercial companies, & should have slightly improved self-damping compared to a single equivalent thickness of MDF. |
I can mix 12mm MDF with 6mm chipboard, or other thickness that you recommend.
It will be lot of work, but can be done.
I dont know how precise will be the cutting of the boards, dont know what machines uses in the shops, but I think they use manual machines, not computer guied ones. Maybe I can get a "wood plotter", but It will cost me really good money.
besides the precision of the cuts, the other "problem" that I have is cutting at 45 degrees. But I will try  |
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Jorge.ar
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| Posted: Mon Apr 26, 2010 1:57 pm Post subject: |
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| I have another question concerning the damping material. My girlfriend works with different kinds of polymers. she can make latex foam, and polyurethane foam in any density and shape. I was thinking that maybe will be good using latex foam (more durability than polyurethane foam) glued to the cabinet walls. what do you think? |
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Jorge.ar
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| Posted: Wed Apr 28, 2010 8:56 pm Post subject: |
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anybody there?  |
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steve s
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Location: east yorks
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| Posted: Wed Apr 28, 2010 9:41 pm Post subject: |
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| Jorge.ar wrote: | | I have another question concerning the damping material. My girlfriend works with different kinds of polymers. she can make latex foam, and polyurethane foam in any density and shape. I was thinking that maybe will be good using latex foam (more durability than polyurethane foam) glued to the cabinet walls. what do you think? |
I've just cut up some new latex foam beds for the caravan.. i would think it would make very good damping...
i've been using some foam (from camping mats its around 10 m thick) on my baffles.. its not latex, but that seems to work ok..
best thing is to ty it...
cheers
steve |
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planet10
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| Posted: Thu Apr 29, 2010 12:23 am Post subject: |
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Jorge,
A sandwich of 2 different materials, with plastic laminate on both sides would probably perform as well or better than BB, but at higher $$ cost and a lot more labour.
Before i switched to BB, i used 12mm HDF with laminate both sides (and lots of bracing)
Actually fiberglasing both sides is even better, but not something i'd tackle without experience and a whole lot harder to finish.
dave
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Jorge.ar
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| Posted: Thu Apr 29, 2010 8:00 pm Post subject: |
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Because I dont have lot of tools and equipment, I decided to use single 18mm wood.
I found some place that sells 11 layer 18mm plywood, also I can find 18mm high density MDF.
18mm 11 layer plywood 2,44m x 1,22m aprox u$s 35
18mm high density MDF 2,44m x 1,22m aprox u$s 45 |
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pre65
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Joined: 22 Aug 2007
Posts: 5970
Location: Ashen Sudbury Suffolk
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| Posted: Thu Apr 29, 2010 8:05 pm Post subject: |
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| Jorge.ar wrote: | Because I dont have lot of tools and equipment, I decided to use single 18mm wood.
I found some place that sells 11 layer 18mm plywood, also I can find 18mm high density MDF.
18mm 11 layer plywood 2,44m x 1,22m aprox u$s 35
18mm high density MDF 2,44m x 1,22m aprox u$s 45 |
I would go with the plywood myself.
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Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.
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chrisby
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| Posted: Thu Apr 29, 2010 9:29 pm Post subject: |
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| pre65 wrote: | | Jorge.ar wrote: | Because I dont have lot of tools and equipment, I decided to use single 18mm wood.
I found some place that sells 11 layer 18mm plywood, also I can find 18mm high density MDF.
18mm 11 layer plywood 2,44m x 1,22m aprox u$s 35
18mm high density MDF 2,44m x 1,22m aprox u$s 45 |
I would go with the plywood myself. |
As the actual builder of most of the speaker cabinet designs posted on the Planet10 site, let me say for this enclosure use plywood for all but the port slot spacers - for those I've generally used MDF, but a moderately soft solid wood would work as well (fir or poplar, etc)
We have arrived at these particular material combinations and construction techniques after multiple builds of a wide range of enclosures over the past approx 10 yrs, so apologies if we sometimes get a bit testy on the subject.
Somebody try giving Ed at the HornShoppe a suggestion for improving or modifying his design or driver of choice.  |
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planet10
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