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Old 9th May 2007, 01:46 PM   #571
scal is offline scal  France
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Default FE168-E sigma project

hi to all,
i'm starting a project based on the foxtex fe168-e sigma drivers, here some pictures of this project: http://scalblog.blogspot.com/
And somes pictures attached:
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Old 10th May 2007, 02:15 AM   #572
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Artistic
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Old 16th May 2007, 08:13 AM   #573
scal is offline scal  France
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Smile Update

Quote:
Originally posted by Geek
Artistic

Updated the blog yesterday, starting to be exiting

http://scalblog.blogspot.com/

(sorry all coments are in french)
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Old 16th May 2007, 06:26 PM   #574
Tweeker is offline Tweeker  United States
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Sealed box with Fostex FE166ES-R and FT17H tweeter. Quasi current source amp using 51 ohms series resistance. Shown resting on its back as floor monitor.
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Old 16th May 2007, 06:37 PM   #575
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Quote:
Originally posted by Tweeker
Sealed box with Fostex FE166ES-R and FT17H tweeter.
Crossover?

dave
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Old 16th May 2007, 08:01 PM   #576
Tweeker is offline Tweeker  United States
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First order, ~.12mH coil in parallel with tweeter for 11k ish, 22 ohm resistor pad also in parallel.

Woofer currently has 15ohms-10uF in parallel with it.

Both these values to be trimmed.
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Old 16th May 2007, 08:27 PM   #577
planet10 is offline planet10  Canada
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Like this?
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Old 16th May 2007, 08:41 PM   #578
Tweeker is offline Tweeker  United States
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Yes.
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Old 16th May 2007, 09:08 PM   #579
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What does the R in the woofer circuit do?

I am considering something quite similar for 207 + FT17 -- i was thinking of an extra series cap on the tweeter.

dave
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Old 16th May 2007, 09:37 PM   #580
Tweeker is offline Tweeker  United States
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Its a shot at baffle step compensation, the woofer is being run pretty much full range. A straight cap in parallel gives the normal 6dB/oct roll off. All this assumes current source amplifier. Normally tweeters are crossed to with cap, doesnt work out same here. All XO components go in parallel with current source amp.
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