Fostex 206 ES-R (Nagaoka) box - diyAudio
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Old 4th September 2006, 05:14 PM   #1
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Default Fostex 206 ES-R (Nagaoka) box

Hello,

I'm looking to get some opinions on the build of the Fostex recommended box.

How difficult is this to build.
Is there a recommended sequence for putting it together.
How much plywood is required to build the pair.

Thanks in advance, any help is appreciated.
Frank
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Old 4th September 2006, 07:42 PM   #2
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Hi Frank,

Is the enclosure a BLH or BR? I can only find a Nagaoka based design with the Fostex 168S and supertweet on the Single Driver site. This looks like a simple ported box.

Jeff
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Old 4th September 2006, 07:58 PM   #3
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Hi Jeff,

The recommended Fostex (Nagaoka) box is a BLH, plans can be viewed at http://www.madisound.com/cgi-bin/ind...21992&pid=2074
Regards, Frank
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Old 4th September 2006, 08:17 PM   #4
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It's not really a Nagaoka cabinet, as he died a couple of years ago. But it's designed on similar principles -upsized variant of the D-37 / 57 really. Technically they're not horns either, but that's getting pedantic -it's the end result that's important. I gather general performance is supposed to be pretty good although a pain to tweak. One of these days I'll get around to modelling them properly.
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Old 4th September 2006, 08:22 PM   #5
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You can figure out the amount of plywood needed from the plans.
Their layout looks like 4X8' sheets. Don't forget you can't get Baltic Birch in this size, only 5X5".
My first question would be, have you read any reviews of this build as to how they sound? There may be other designs out there that are easier to build and sound better. Just a thought as I'm unqualified to give an opinion regarding this design.
I thinks it would be a bit much for a beginner BTW.

Jeff
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Old 4th September 2006, 08:24 PM   #6
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Sorry, that's 5ft X 5ft, not 5 inches.

Jeff
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Old 4th September 2006, 09:28 PM   #7
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The larger driver speakers usually use 21mm ply which I don't know if you can find but I certainly can't in my neck of the woods.
I built similar cabs and had to laminate 2 sheets of ply together.
They are all straight cuts so are easy but there are usually several dozen pieces to cut.
An accurate TS would be easy.
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Old 5th September 2006, 04:49 AM   #8
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From the looks of it, this design takes *4* sheets of plywood per speaker, that is, *8* sheets for a pair of speakers. I don't know how much a sheet of plywood weighs, and, you will have a bunch of leftovers, but, this looks to be a HEAVY speaker!

Tom.
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Old 5th September 2006, 07:42 AM   #9
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I just finished the recommended horns this weekend. It took me about 5 4x8 sheets of plywood and MDF (I used some leftover stuff). Having built 4 previous sets of speakers, some with crossovers, some without, I would say that the cabinets can be difficult if you have not built similar designs. The one important thing I learned was measure twice, think about cutting, measure a few more times and then cut. 1mm of drift will show up if you don't be careful. As far as assembly goes, I kind of winged it. I started from the bottom and went up. I would probably not do it the same way if I were to repeat the process.
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Old 5th September 2006, 11:53 PM   #10
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Hey all,

I was over in Seattle, at Compton's (big commercial lumber yard) last winter, and they said they could get 4x8 baltic birch (actually either baltic, Finnish, or Russian birch, depending on supply). So it is available if you ask around.

Doug
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