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Old 27th November 2005, 04:48 PM   #1
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Default concrete board as a speaker cabinet

Has any one tried this or is it not practical. 1/2 inch hardybacker.
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Old 27th November 2005, 06:05 PM   #2
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you mean pure/raw wood boards ??

It is overkill for a speaker cabinet IMHO

Moreover, pure wood boards are not adapted for speaker building because their properties change with time due to the water remaining inside them, a problem you won't get (or you are not likely to get in "normal" conditions) with MDF or plywood board.
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Old 27th November 2005, 06:21 PM   #3
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No, he means cement board.

Woven glass mesh with a cement core.

Wonderboard is another example.
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Old 27th November 2005, 06:28 PM   #4
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Quote:
Originally posted by chipco3434
No, he means cement board.

Woven glass mesh with a cement core.

Wonderboard is another example.

Ooops sorry I don't have the english skill necessary to talk about this stuff I should have searched a translation before

Never tried this so I cannot say anything.

It should be OK if you find thick enough boards, as it has a well damped sound when you knock on it.

But maybe the hardest part would be building a neat cabinet with that. Good luck !

Greets !
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Old 27th November 2005, 06:43 PM   #5
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It's very stiff, (good ), but very porous to air, (bad ). If you laid it up with another material it should work well.
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Old 27th November 2005, 06:58 PM   #6
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I'm not sure how stiff it is... Try picking up a sheet of it-its as flexible as plywood I'd say. The fibers make it similar to ferrocement which can be surprisingly flexible. It may still be a good material, but people tend to assume: cement= stiff
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Old 27th November 2005, 06:58 PM   #7
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Not suitable for loudspeaker enclosures IMO.

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Old 27th November 2005, 09:27 PM   #8
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Chronic resonance at low[ish] frequencies alone. Only suitable for killing MDF resonances as a compound panel as far as I can see (I believe Bob Brines does this, or something similar to good effect)
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Old 27th November 2005, 11:09 PM   #9
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The stuff, (known as blueboard in the building trade), we get over here in the UK, is usually used as tile backing and is very stiff, much more so than plywood.
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Old 28th November 2005, 02:10 AM   #10
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Thanks for the replys.
I used the wonderboard under ceramic tile in my house and was courious how the 1/2 inch thick board would work with the fostex 108s
One problem would be building the cabinet. Connecting the boards to each other.
I just wondered if anyone had tryed to use the concrete boards before for cabinets?
Thanks again.
Steve
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