I've been considering building speakers and subs with two layers of MDF, and a layer of cork between them.
However, I found out that cork expands and contracts with small water exposure (fear: humidity).
And I want to give my projects a mirror finish, so I can't have it expanding and cracking my auto paint/clear.
Is there another material that I can use, in the place of cork?
However, I found out that cork expands and contracts with small water exposure (fear: humidity).
And I want to give my projects a mirror finish, so I can't have it expanding and cracking my auto paint/clear.
Is there another material that I can use, in the place of cork?
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I thought cork was waterproof ( I'm probably wrong) but MDF is just as, maybe more, susceptable to moisture.
To get a mirror finish on MDF is something i have found next to impossible due to its absorbent nature.
To get a mirror finish on MDF is something i have found next to impossible due to its absorbent nature.
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I think you would be better off with inside layer plywood and mdf outer 
e.g. 1/2" ply and 1/2" mdf OR 3/4" and 3/4".
Put the cork on the inside of the box.
e.g. 1/2" ply and 1/2" mdf OR 3/4" and 3/4".
Put the cork on the inside of the box.
Use visco-elastic sheet as middle layer. The ratio of mass (kg/m2) on each side must not deviate from miniumum 1/3. 1/1 is perfect.
Thumbs UP !
Or... for a nice "wooden look" finish, the ply on the outside, mdf on inner.
This is indeed one of the best ways to build an enclosure, because, well
the dis-similar woods add up to where the final result (the addition) is greater than the sum of the parts.
For an exotic twist, one could add a layer of roofing felt (the 30lb type if you can find it, otherwise the 15lb stuff will have to work) in between, for
a constrained layer damping effect.
Also, for what it's worth, I'm interested in what that "visco-elastic sheet"
is other-wise known as ??
I think you would be better off with inside layer plywood and mdf outer
e.g. 1/2" ply and 1/2" mdf OR 3/4" and 3/4".
Put the cork on the inside of the box.
Or... for a nice "wooden look" finish, the ply on the outside, mdf on inner.
This is indeed one of the best ways to build an enclosure, because, well
the dis-similar woods add up to where the final result (the addition) is greater than the sum of the parts.
For an exotic twist, one could add a layer of roofing felt (the 30lb type if you can find it, otherwise the 15lb stuff will have to work) in between, for
a constrained layer damping effect.
Also, for what it's worth, I'm interested in what that "visco-elastic sheet"
is other-wise known as ??
But so many factories do. The surfaces I can do, it is the seam soak in a year later I am testing ideas on.
I want to try MDF outer, then a ceramic tile with Dunamat on the inside, glued to the MDF with RTV. I build subs of plywood with a ceramic liner and it worked very well.
Hi,
The middle layer can be just contact adhesive, or solid PVC
flooring, or bitumen roofing sheet, tar paper or tar felt.
rgds, sreten.
The middle layer can be just contact adhesive, or solid PVC
flooring, or bitumen roofing sheet, tar paper or tar felt.
rgds, sreten.
For the sheet, there is the brand Dynamat, but I found much cheaper versions that are better on-line. Look at both car stereo and under professional sound control. They make wall board with the sheet inside too. Look at boating supply as they make mats to quite engine compartments.
I am dying to make cabinets with the outer "antique bamboo" flooring from Lowes with an MDF liner.
I am dying to make cabinets with the outer "antique bamboo" flooring from Lowes with an MDF liner.
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