sub enclosure type

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=13995
Printed Date: July 24, 2025 at 10:22 PM

Topic: sub enclosure type

Posted By: Craig Fletcher
Subject: sub enclosure type
Date Posted: May 26, 2003 at 5:57 AM

Hi all , im new on here so be gentle .
ive went and done things the wrong way round (as usual) and seen subs bought them and then
thought about how to fit them . I was going for a simple sealed enclosure for my 2 focal 33a 13" 400wrms subs ,
but the thing is in the destructions that come with them it only gives box dimensions for a ported enclosure so im wondering
if i put them in a sealed unit will it damage my new babies? i dont want big boomy bass but tight stuff for quality so a bit confused about where to go from here any ideas appreciated Craig

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alfa155.com

Replies:

Posted By: DYohn
Date Posted: May 26, 2003 at 9:05 AM

Hi. The Focal Access 33a is a relatively new German fiberglass cone woofer designed for a bass-reflex (vented) enclosure of 30 to 45 litres. It can also be mounted infinite baffle (free-air.) A sealed anclosure could be designed for it but it will not perform as well as in a vented one. Here's the Theil Small's for this driver.

fs = 29 hz

Qts = 0.62

Vas = 124 Litres

Xmas = 9 mm

Posted By: Craig Fletcher
Date Posted: May 26, 2003 at 12:10 PM

thank D but ive got this info on the sub but i think youve got mixed up info as mine is
fs 47.37hz , qts0.575 , vas 27.12 litres and xmax 7.5mm and they are french im not trying to sound off but letting you know .

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alfa155.com

Posted By: Craig Fletcher
Date Posted: May 26, 2003 at 12:17 PM

anyone else got any suggestions on this ? anyone using these speakers are they too boomy in a vented box?after all i do have to carry the little one around in the car sometimes.

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alfa155.com

Posted By: bdl666
Date Posted: May 26, 2003 at 2:30 PM

I ran those specs on WinIsd Pro and on Blaubox and it seems like a 53 litres enclosure should be fine for them. I say try it and see how they sound.

Posted By: Craig Fletcher
Date Posted: May 28, 2003 at 3:55 AM

Thanks a lot bd166 , sorry to go on but was that a single woofer enclosure or for both in one box i tried blaubox but got quite confused by it all
as i said im new to all this thiel buisness and im trying to get as many opinions as poss thanks again for your time , ps if your ever in liverpool england ill show you how it turned out !!!!!! posted_image

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alfa155.com