fonken-style box nomenclature... what is with those names? - Page 3 - diyAudio
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Old 13th May 2011, 06:11 PM   #21
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Default Fonken for CHR 70

Hello to you all
I would really love to build a Fonken style cabinet with the CHR 70 as driver.
But I can't find any plans on that matter...

Could you kindly provide some instructions on how to implement ther CHR 70 into the Fonken?
Thanks so much guys
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Old 13th May 2011, 06:52 PM   #22
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Fonken is a code word for Fostex + Onken, as far as I know, or rather for some Feastrex + Onken.
Onken is the Japanese designer who used this concept a lot. His concept was popularized in the French magazine L'Audiophile, by the famous mr Jean Hiraga.

You can find how to calculate the vented box for ant LS, in this ONKEN CALCULATOR, by Cyr-Marc Debien.
It will give the vent length and width plus depth.
You enter the LS data.
Fine tuning is done with inserting some material in the vent (like felt).
easy isn't it?
albert
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Old 13th May 2011, 06:53 PM   #23
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lenconian:
These: IMG_1394.jpg are using MA ChR-70's.
Contact Dave @ planet_10 hifi
don
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Old 13th May 2011, 07:48 PM   #24
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Quote:
Originally Posted by triode_al View Post
Fonken is a code word for Fostex + Onken
The Fonkens only borrow the configuration of the side slots from the Onken. The tuning is quite different.

lenconian, the box you want is the CHR-Ken (pronounced the same as the sea monster). The plans are not free (althou they come as part of a purchase of P10 drivers), you have mail with the details.

Attached is a snap-shot the title page of the current plan-set to give an idea of how comprehensive the document is.

dave
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File Type: gif dMar-Ken-title070311.gif (83.4 KB, 675 views)
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Old 13th May 2011, 08:07 PM   #25
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A picture of our CHR-Ken @ VI diyFest 2010

Click the image to open in full size.

dave
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Old 13th May 2011, 08:55 PM   #26
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Thank you very much guys
CHR Ken is a great name

and it's a great speaker so I can fully understand you charging a minor charge for it. I mean your actually giving it away for free when the speakers are ordered from you. That's a great service
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Old 13th May 2011, 10:22 PM   #27
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Dave,
Are the microFonkens the smallest form factor you have. I would like to try the new CHR or an EL for monitor speakers.
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Old 14th May 2011, 12:31 AM   #28
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There is a wider, shallow variation on the concept with a 1.5 litre base (instead of 2 litre in the uFonken), but it has more vent so end volume is liely similar.

There is a 2.5 litre base one for the A6.2 (either one), but you really need to go to the milliSize for the EL70 or CHR.

dave
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Old 14th May 2011, 02:38 AM   #29
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Would againclone be a good amp for it. Looking for small and simple but still sounds good.
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Old 14th May 2011, 03:10 AM   #30
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The EL70 & the CHR should both be happy with a gaineclone. I had the proto mMar-Kel in my office (i have a rotation of milliSize) forever with ah "1875" gainclone. Sounds good.

dave
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