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Old 22nd February 2008, 02:04 PM   #1
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Default supravox 4th order band pass

Hello

I want to build a sub based on the 12' supravox 285 gmf (Fs: 47 hz, VAS : 150 l, Qts : 0,39)

i can not change the driver because i already own it


this sub is a 4th order band pass load which is good from 40 to 150 hz (200hz in the commercial version and on the graph (with an equalizer perhaps)


the pics :
http://www.supravox.fr/kits/285sym.pdf

(i do not insert the pdf file because i do not know if i have the right to dot it, trademarks...)

this sub is about 100 liters (70 l behind and 24 l in front)

if I respect this volume, can i change the shape :

this is approximatively a cube, and i want a rectangle (72cm tall)
the speaker will be then placed horizontally

the port will be the same but at the top of the sub

I heard that for a sub, shape does not matter (because of the size of the wave)
is it still true for a 4th order bnd pass

Thanks for your answers

If somebody has some experience with a supravox 285 GMF of a reasonable size in bass reflex , i would be glad to hear his advices


thanks in advance for your plethorics answers :)
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Old 22nd February 2008, 10:38 PM   #2
Thawach is offline Thawach  Thailand
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hi

you can change it.


bye

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Old 26th February 2008, 06:57 PM   #3
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Thawach,

You crack me up.

Larry
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Old 21st March 2008, 09:10 PM   #4
schmeet is offline schmeet  United Kingdom
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Download winisd and have a look what the effect will be
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Old 21st March 2008, 09:10 PM   #5
schmeet is offline schmeet  United Kingdom
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i believe though that aslong as the port length and the internal volume stay the same there will be no difference at all
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Old 8th April 2008, 10:11 AM   #6
CANTAL is offline CANTAL  French Southern and Antarctic Lands
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Default Re: supravox 4th order band pass

Bonjour

La forme du volume d'un bass-reflex n'a aucune conséquence sur le fonctionnement de l'enceinte. Ceci dit, il faut éviter les tuyaux d'orgue, les tuyaux de poêle et les évents de très grande longueur et de faible section.
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Old 8th April 2008, 04:32 PM   #7
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Hi Cantal,

This is an English speaking forum. If you wish to post in another language, please also post the English translation.

Thank you.
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Old 9th April 2008, 02:26 AM   #8
Thawach is offline Thawach  Thailand
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cal....lol i don't know this language as the same.


regards/
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Old 9th April 2008, 09:41 AM   #9
CANTAL is offline CANTAL  French Southern and Antarctic Lands
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Quote:
Originally posted by Cal Weldon
Hi Cantal,

This is an English speaking forum. If you wish to post in another language, please also post the English translation.

Thank you.

So, that's a english translation for you overseas :

" The shape of a baffle does'not matter in a bass-reflex design.

Avoid stoves pipes, organ pipes, long and narrows ports."

I speak french with a french fella. I speak horse with my horse, not english.

One provocation : are irakis willing to speak anglo-american lingua franca?
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Old 9th April 2008, 03:04 PM   #10
Thawach is offline Thawach  Thailand
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Hi CANTAL......lol i have just known that u have two version.
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