What cabinet to build for a Fostex FE168 S Sigma? - diyAudio
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Old 14th May 2010, 09:34 PM   #1
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Default What cabinet to build for a Fostex FE168 S Sigma?

I just won a pair of Fostex FE168 S Sigma on ebay. What sort of cabinet should I build?

Don't want to build a large and complex horn but should be fine building something a bit simpler and less large. I've built speakers before and have tools and skills. My listening room's not that big, so tall is OK but trying to avoid a large front-to-back footprint.

All suggestions extremely welcome - I'm waiting to get started!

Andy
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Old 14th May 2010, 10:02 PM   #2
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Something like a BIB is probably going to be your best bet, as they're not all that happy in vented boxes (sans LF support) & you say you don't want complicated.
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Old 14th May 2010, 10:11 PM   #3
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by andyjevans View Post
I just won a pair of Fostex FE168 S Sigma on ebay. What sort of cabinet should I build?

Don't want to build a large and complex horn but should be fine building something a bit simpler and less large. I've built speakers before and have tools and skills. My listening room's not that big, so tall is OK but trying to avoid a large front-to-back footprint.

All suggestions extremely welcome - I'm waiting to get started!

Andy
Looks like Scott beat me to it, but the first that come to mind would be BIB or Metronome - certainly among the simpler builds around , and probably smallest footprint,



The Metronome

Click the image to open in full size.



or Scott Lindgren's own Hiro

Click the image to open in full size.


http://homepage.mac.com/tlinespeaker...v01-220309.pdf


There are also a couple of the larger Fostex BLH (Nagaoka) manifold horn designs for 166 etc that have been well reviewed - however, they are a time consuming build, and consume even more material than Hiro.



Of course the simplest enclosure is none- there is always something like the MJK Open Baffle concept - with support by a 15" woofer. Someone must have tried that by now.
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Last edited by chrisb; 14th May 2010 at 10:22 PM.
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Old 14th May 2010, 10:18 PM   #4
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Hi guys,

Thanks for your quick responses! Where can I find the plans and dimensions for the Metronome and an appropriate BiB?

Many thanks,

andy
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Old 14th May 2010, 10:29 PM   #5
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BIB dims for Fostex

Bigger Is Better 'BIB' Cabinet Dimensions - ZillaSpeak

That's a good starting point. I can't speak for the other designs but i am sure they are very good.

Godzilla
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Old 14th May 2010, 10:37 PM   #6
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by andyjevans View Post
Hi guys,

Thanks for your quick responses! Where can I find the plans and dimensions for the Metronome and an appropriate BiB?

Many thanks,

andy

If you're not already familiar with the designs, take a quick trip through the sites for a background.

There are tables of calculated dimensions for a wide range of drivers for each of the design types, and in some cases detailed drawings or photos.

BIB:


Bigger Is Better 'BIB' Cabinet Dimensions - ZillaSpeak


Metronome:

The Metronome
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Old 14th May 2010, 10:40 PM   #7
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I think mine are the old wizzer ones as below. How do I work out the cabinet dimensions from the line length?

Andy

BIB for FE168S - old style with wizzer
L = (Line length) 113"
Zdriver = Driver 22.5" down from sealed end of cabinet
Sm = 74.25"^2
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Old 14th May 2010, 11:34 PM   #8
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I found this

Proposals

How would that compare to a BiB?

I'll look at the calculations for BiB and see if I can work them out.

andy
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Old 15th May 2010, 01:14 AM   #9
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Hi andyjevans, congrats (I saw that auction).

If you go BiB, use the BiB calculator on the BiB site. It will tell you the exact dimensions for every piece, allow you to choose material thickness etc. It will also calc a tad differently.

Hiro looks very tempting, as does Bob's MLTL. Why not build them all
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Old 15th May 2010, 03:01 AM   #10
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Quote:
Originally Posted by andyjevans View Post
Where can I find the plans and dimensions for the Metronome and an appropriate BiB?
No Met yet for the old FE168S Met, but ome examples for other drivers. A Met could be calced.

The Metronome

dave
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