Terry Cain's BIB -why does it work and does anyone have those Fostex Craft Handbooks? - Page 113 - diyAudio
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Old 13th August 2006, 11:34 PM   #1121
dmason is offline dmason  United States
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I know. This is the why, the how, and the holy ghost. 91db @ 30Hz. Jim, they must sound amazing. Do the plugs next.

Imagine what full-on orchestral dynamics sound like, with these and a fast amp playing something like Bernstein conducting, "Rodeo" ...but in your living room.
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Old 20th August 2006, 05:46 PM   #1122
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hi all,

has anyone built the bib for the Fostex fe-166es-r yet?

Using GM's excel spreadsheet calculator I get this but am concerned about the biga$$ magnet that it has and if it will actually fit. I know I can juggle the figures but if someone has already done it I see no need for me to reinvent the wheel.


Thanks

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Old 20th August 2006, 05:57 PM   #1123
zobsky is offline zobsky  India
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Quote:
Originally posted by Andrewbee
hi all,

has anyone built the bib for the Fostex fe-166es-r yet?

Using GM's excel spreadsheet calculator I get this but am concerned about the biga$$ magnet that it has and if it will actually fit. I know I can juggle the figures but if someone has already done it I see no need for me to reinvent the wheel.


Thanks

in case it doesn't fit, you could always build a spacer baffle to increase the distance between the back wall and the magnet
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Old 20th August 2006, 06:26 PM   #1124
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Zobsky and all,

I just whipped out the graph paper and did a quick scale drawing. It will NOT fit so the
extra baffle will be needed. I was planning on putting on some wings anyway so will incorporate them into the extra spacer baffle.

Thanks
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Old 20th August 2006, 06:41 PM   #1125
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That's the only problem with sticking to the ~ideal conical expansion rate -you'll usually need an additional baffle to get sufficient clearence. You can shift to a different rate -TC's original used a WxD ratio if 1:2.1 for example. How audible the differences between different expansions are is an interesting question. I suspect minor differences won't be that audible, though using Greg's spreadsheet should give the theoretically optimal results.

There has been a 166ES-R BIB (Clarke -you out there?) with considerable success I gather.
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Old 20th August 2006, 08:11 PM   #1126
Tachyon is offline Tachyon  Sweden
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I'll get the measurements on my BIB's with 166 ES-R tomorrow, the magnet is free by one cm.

For those who remember my missunderstanding on the clearance of the internal baffle at the bottom, I decided to take the bottom out and grind away that extra cm at the end.

I'm now in the process of oiling them with chinese wood oil and some pigment. I have ordered two black stone slabs to use as a plint for them to stand on.
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Old 20th August 2006, 08:14 PM   #1127
Tachyon is offline Tachyon  Sweden
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Old bottom out..

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Old 20th August 2006, 08:16 PM   #1128
Tachyon is offline Tachyon  Sweden
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New bottom fits like a glove..



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Old 20th August 2006, 08:25 PM   #1129
Tachyon is offline Tachyon  Sweden
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Clearance around driver

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Old 20th August 2006, 08:27 PM   #1130
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Oh yes indeed. Very nice. Scott likes.
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