Cabinets made with Finland Birch Plywood - Page 3 - diyAudio
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Old 7th March 2011, 06:22 AM   #21
EUVL is offline EUVL  Europe
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Nothing to report.
But if you want to duplicate our BR box, please contact Mark L.

Patrick
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Old 7th March 2011, 06:38 AM   #22
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Patrick,

I like your BR box. I will contact Mark L.

Tony.

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Nothing to report.
But if you want to duplicate our BR box, please contact Mark L.

Patrick
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Old 7th March 2011, 07:12 AM   #23
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it seems the layers are very thick. 18mm with 3layers only?

how's the sound compared to good birch ply?
It is only 3 layers. The middle ply is bambbo blocks, the outer layers are strands of bamboo bonded together in a matrix. This makes it conceptually much like the aluminum skinned honeycomb used in airplanes and such.

It is stiffer, and sounds better than BB. It is also some 10x as expensive (ignoring that you have to pay for the veneer to cover the BB). To take max advantage it is more complex to cut and assemble. It is lovely with a clear coat.

Our earlier bamboo builds were with laminate outer plys (strips of bamcoo) and from early in its availability in north america (only 2 finishes), Even with lower stiffness ahead of BB.

Click the image to open in full size.

Click the image to open in full size.

As soon as we get the right drivers in them we will do a photoshop of the 3 sets we made with the stranded neopolitan,

dave
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Old 7th March 2011, 07:17 AM   #24
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dave,

At supermarket in China, I saw a kind of bamboo plate for cutting meats and vegetables using in kitchen. It is very solid and heavy with high density. I think this should be the one what you said the bamboo plywood.
Bamboo cutting boards. We can buy those too. they are a single layer side-by side laminate. Not as stiff or suitable as the plywood.

Materials lik this are the harbinger of building materials made of renewable grasses (notable bamboo & hemp)

dave
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Old 7th March 2011, 07:49 AM   #25
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Very nice cabinets, dave.
If I have the Chinese name of this bamboo plywood, I can find this material in China.

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Tony.
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Old 7th March 2011, 08:25 AM   #26
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When i was googling bamboo ply i found at least 2 chinese websites. Emailed Mark at least one of them.

dave
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Old 7th March 2011, 08:42 AM   #27
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Yes, there are many bamboo plywood suppliers in China.

These bamboo plywood in 3 layers shown should be what you said, dave.

Thanks,
Tony.

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When i was googling bamboo ply i found at least 2 chinese websites. Emailed Mark at least one of them.

dave
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Old 7th March 2011, 10:06 AM   #28
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dave,

Is it good to use thicker plywood 24mm at front panel for Pensil 10.2?

Thanks,
Tony.
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Old 7th March 2011, 10:20 AM   #29
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These bamboo plywood in 3 layers shown should be what you said, dave.
That is the strip outer layer. If you can find stranded it is quite a bit stiffer.

The stuff you pictured is still good, but the surface is softer than the stranded and easier to dent. The one plus is that it is quite a bit lighter.

dave
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Old 7th March 2011, 10:22 AM   #30
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dave,

Is it good to use thicker plywood 24mm at front panel for Pensil 10.2?

Thanks,
Tony.
No. That will screw up the tuning. If you want to make the cabinets better than they already are put in some bracing. The brace that connects the back of the driver to the back of the box is particularily useful at improving the downward dynamic range, and the Alpairs are capable enuff to make good of it.

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