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Old 30th November 2008, 01:24 PM   #61
Zen Mod is offline Zen Mod  Serbia
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Wood & Varnish
Default just stumbled on this

http://depositfiles.com/files/zhp2tv439
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Old 1st December 2008, 05:57 PM   #62
kavermei is offline kavermei  Belgium
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I recently built a pair of Fostex BLH in beech ply (not birch).

I can't compare the sound with other materials, since this is my first pair of quality speakers, and they blow away anything I've had before. I never heard other horn/TL/QW designs.

At any rate, I find the beech ply to be very visually pleasing. I still have to decide on a finish, though...
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Old 11th December 2008, 03:05 PM   #63
serenechaos is offline serenechaos  United States
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if anyone's interested in urushi lacquer, feastrex used on nessie style cabinets @ RMAF 2008:

Effects of oriental lacquer (urushi) coating on the vibrational properties of wood used for the soundboards of musical instruments

Abstract:
In order to investigate the possibility of Oriental lacquer (urushi) as a coating for the wooden-soundboard of musical instruments, the effects of urushi coatings on the vibrational properties of wood were compared to those of conventional coatings. By coating, the dynamic Young’s modulus of wood decreased slightly in its fiber direction whereas that in the radial direction increased. The most remarkable changes due to coating were recognized in the internal friction of wood (Q-1), especially that in the radial direction. The effect of the urushi coating on the Q-1 of wood was relatively small and very close to those of polyurethane coating used for the soundboard of harp. The viscoelastic and mechanical properties of urushi lacquer films were also similar to those of the polyurethane lacquer film. These results suggested the possibility of urushi as a coating for the harp soundboard. The effects of coatings on the vibrational properties of wood were explained by using a model considering three layers, the uncoated wood, coating layer, and a layer consisting of lacquer and wood cell wall.

The rest of the paper is @: http://www.jstage.jst.go.jp/article/ast/22/1/27/_pdf
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Old 12th December 2008, 03:11 PM   #64
xyrion is offline xyrion  Croatia
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And now something completely different...

Saba Cello -a fullranger hard coupled to a resonating 3mm ply enclosure. For classical and jazz music only.
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Old 12th December 2008, 04:16 PM   #65
Aengus is offline Aengus  Canada
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From the Saba cello site:

Quote:
Cover: 480 mm deep and at its widest point between 380 and 400 meters wide. [my emphasis]
Mind you, it looks smaller in the pictures.

Regards.

Aengus

[edit] fixed HTML
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Old 12th January 2009, 10:33 PM   #66
bobhowell is offline bobhowell  United States
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I have made several speakers out of 5/4 poplar, which dress out to about 1", and is available around Atlanta in long, wide, clear boards at about $1.50/sq ft. You will have little waste because widths of 5-12 are available. Also Basswood is about the same price and even softer and less resonate, but still available in wide, clear boards.

I have made 6-8 of Zaph's designs from soft, currly maple this fall because it is beautiful and cost $2.00/sq ft. I made two subs from a 7/8 thick, 12.5 wide, 9 ft board of beautiful soft curly maple.

I also just finished a set of Fostex 107E using the plans for BR enclosure Fostex provides, and 1/2" walnut because I had it around.

These woods come 2" thick also, if you want to make a BIG SUB.

I finish with Tung Oil and then light Shellac coat you hardly see.


I would be interested in what thoughts you have on my materials.

I love the way they sound. I'm 63 and everything sound great. Don't really know how mush of the spectrum I pick up, but love what I do.

Thanks

Bob
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Old 12th January 2009, 10:53 PM   #67
cervelorider is offline cervelorider  United States
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Quote:
Originally posted by bobhowell
I have made several speakers out of 5/4 poplar, which dress out to about 1", and is available around Atlanta in long, wide, clear boards at about $1.50/sq ft. You will have little waste because widths of 5-12 are available. Also Basswood is about the same price and even softer and less resonate, but still available in wide, clear boards.

I have made 6-8 of Zaph's designs from soft, currly maple this fall because it is beautiful and cost $2.00/sq ft. I made two subs from a 7/8 thick, 12.5 wide, 9 ft board of beautiful soft curly maple.

I also just finished a set of Fostex 107E using the plans for BR enclosure Fostex provides, and 1/2" walnut because I had it around.

These woods come 2" thick also, if you want to make a BIG SUB.

I finish with Tung Oil and then light Shellac coat you hardly see.


I would be interested in what thoughts you have on my materials.

I love the way they sound. I'm 63 and everything sound great. Don't really know how mush of the spectrum I pick up, but love what I do.

Thanks

Bob
Here are my thoughts on your materials... "Jealous, Jealous, Jealous."

Would love some photos, although it might make me even more envious! Thanks so much for posting.
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Old 26th January 2009, 01:34 AM   #68
GTR-33 is offline GTR-33  United States
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I'm looking at building some Sachikos and I've been shopping for the best material for the cabinet.

A local store carries 13 ply Baltic Birch and I'm pretty certain that's what I'm going to use at that's what they were designed around; however, despite the lack of popularity of MDF other people have said that it is more neutral and doesn't color the sound. My local store also carries veneered MDF in Baltic Birch, Cherry, Red Oak and Birch.

I'm leaning to the Cherry Veneered MDF as I like the look more than Birch as it may, I don't want to destroy the sound.
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Old 26th January 2009, 01:53 AM   #69
cervelorider is offline cervelorider  United States
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Default Devil

Use the 3/4 inch baltic birch. You'll be in love with your speakers and your lungs will still function.
I've built a pair of Sachiko's from Baltic Birch and a pair from Maple ply. Both sound wonderful.
Have fun with your build!
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Old 26th January 2009, 01:56 AM   #70
cervelorider is offline cervelorider  United States
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Default Cherry Ply

I also built a pair of Saburo's out of Cherry Ply. They turned out nice and sounded great too. You may want to see if your lumber yard has Cherry ply.
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