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sub enclosure?

Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=42323
Printed Date: May 12, 2025 at 3:32 PM


Topic: sub enclosure?

Posted By: gumuchim
Subject: sub enclosure?
Date Posted: November 05, 2004 at 9:19 PM

I have 2 12" alpine type r subs.  i have a sealed box with about 1cf of air space each.  if i were to make a ported box will that effect the sound quality. make the bass louder?  any ideas, box specs? 




Replies:

Posted By: 93accordSE
Date Posted: November 05, 2004 at 9:59 PM

The sound between sealed and ported is waay different. It would be a drastic change from sealed.



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Posted By: CarAudioHelp
Date Posted: November 06, 2004 at 10:09 AM
It depends on the woofer. It may be able to use a one cubic foot box with a port or it may not. The only way to tell is to drop the Thiele/Small parameters into a software program and see what happens. Set the box size to one cubic foot and then play around with the port tuning. It may work and it may not. Ported boxes have a theoretical volume increase of 3 decibels over a sealed box. This usually means you'll need a larger box though. The port, when design properly, will reinforce the lower bass up to the point of the port tuning frequency. Below the port tuning frequency the bass will drop off rapidly. My gut tells me that box is too small but you'd have to run the numbers to know for sure.

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