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Old 7th September 2012, 12:15 PM   #1
leo2 is offline leo2  Netherlands
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Default fostex ff165wk in voigt pipe

Hello!

After building Half Chang speakers with Fostex FE206 en, I am looking for a
new project.
The Half Chang's do sound great but they miss a bit of low end considering the size of them.

I am thinking about something a bit smaller and the Fostex FF165wk looks
interesting to me.

Would they fit a (folded) Voigt pipe? Or would it be possible to re-design the
frugel-horn to fit the FF165wk?

I use a 10W single ended tube amp.
Room size is about 18,5 m2 and 52 m3.

leo
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Old 7th September 2012, 12:59 PM   #2
GM is offline GM  United States
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T.C.'s original BIB if the height is acceptable and backed up against a wall and preferably in corners is an option.

GM
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Old 7th September 2012, 01:23 PM   #3
leo2 is offline leo2  Netherlands
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family won't aprove with a BIB, and there's no usable corners
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Old 7th September 2012, 02:51 PM   #4
zman01 is offline zman01  Bangladesh
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leo2, how many hours have you got on the drivers?
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Old 7th September 2012, 04:09 PM   #5
chrisb is offline chrisb  Canada
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Perhaps part of your disappointment from the FE206E in Chang is that they were originally targeted for FE207E - the appropriate enclosure of that catalog's vintage for the 206 would have been Sachiko "Olson Manifold Horn" - granted a much more detailed build and larger cabinet.

To answer the question re modifying FH3 - in short, an experienced dental surgeon might be able to stuff this 6" driver in the enclosure, but not without severely hamstringing the performance - and I doubt you want to be underwhelmed by this next build.

Terry Cain's original Abby (now Lovecraft Designs) was optionally outfitted with the earlier FF165K (in fact a buddy of mine had both 165s and 167s for his) - presumably the WK would work well enough in a similarly dimensioned "classic" Voigt pipe.

More likely is that something like a floorstanding MLTL such as Brine's M12-FF165, or a "pensilesque" would likely deliver the implied desirable compromise of bass weight/extension, relatively simple build and domestically acceptable form factor. But, to echo GM, to squeeze the most juice from the bottom octaves with this class of drivers - bigger is (probably) better - and there are several such designs from which to choose.
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Old 7th September 2012, 07:30 PM   #6
leo2 is offline leo2  Netherlands
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Chrisb, I'm not disappointed with the Chang. I actually love them except from the bottom end. I don't want real heavy bass, just a little bit more, but (if possible) with a smaller
footprint.
What I meant about re-modifying FH3 is to somehow upscale the concept of FH3 to fit
a 6" driver. I don't know if this is possible and I don't know how to do it, but somehow
it seems like an interesting option to me.

leo
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Old 7th September 2012, 07:45 PM   #7
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Quote:
Originally Posted by leo2 View Post
What I meant about re-modifying FH3 is to somehow upscale the concept of FH3 to fit
a 6" driver.
That same question has been asked so MANY times. We tried from the start with no success. 4-5" is the sweet spot it seems

dave
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Old 7th September 2012, 08:04 PM   #8
leo2 is offline leo2  Netherlands
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Dave,

So to try the FF125wk would be a better option?
Is there an answer to why it couldn't be done with a 6" driver?

(I'm trying to learn)

leo
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Old 7th September 2012, 09:11 PM   #9
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by leo2 View Post
Dave,

So to try the FF125wk would be a better option?
For the FH3? yes - certainly a better option than attempting to shoe-horn any 6" driver in that enclosure.

As your room is of moderate dimensions, this size of driver could well be a sweeter choice overall.

Keep in mind that of the Fostex drivers, one that was on the original short list of candidates for the FH3 was the FE126En - although the FE108EZ and perhaps even FX120 & F120A could work. One that we know for sure doesn't "sound favorite" (to use a Woden-ism), and at frequency range well above the bandwidth at which the rear horn load is of benefit, is the FE138ESR

Quote:

Is there an answer to why it couldn't be done with a 6" driver?

(I'm trying to learn)

leo
Scott might be willing to address that question again, or perhaps Dave could delve in the archives for earlier replies and post as a sticky here, or on the FH site?
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Last edited by chrisb; 7th September 2012 at 09:16 PM. Reason: furtherance of detail
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Old 7th September 2012, 10:38 PM   #10
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Quote:
Originally Posted by leo2 View Post
Is there an answer to why it couldn't be done with a 6" driver?
Anything that works gets so big you might as well build A166 or Victor (for FE166).

dave
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