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Old 23rd July 2004, 05:44 AM   #1
Maples is offline Maples  United States
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Default Adding a Port to my enclosure

Hi,

I have this 8" Sub I am using with my computer, it's in a premade sealed box. I want to add a port to it. I used to know of an applet that given the specs of the speaker the enclosure could produce specs for the appropriate port to use. I no longer know where that applet is, though I have searched for it, I am still at a loss.

What can I do to figure out what size port I can use and moreover what can I make the port out of? Thanks!
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Old 23rd July 2004, 05:52 AM   #2
sqlkev is offline sqlkev  United States
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hey..you could try to download this free program to play around with
http://www.linearteam.dk/default.aspx?pageid=winisdpro
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Old 23rd July 2004, 07:03 AM   #3
Maples is offline Maples  United States
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Thanks, I'll look into that program. I am still interested in more replies though!
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Old 23rd July 2004, 07:10 AM   #4
sqlkev is offline sqlkev  United States
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I'd love to help you model out your sub with the programs that i have (bassbox pro & winisd)
but I don't have the specs of your sub.

The port size (volume) is dependent on the tuning frequency that you desire and the enclosure's internal volume.
Maybe if you could be more specific, I'm sure you'll get more help from the guys here.

Btw, you could buy the ports about any audio stores..
partsexpress.com is a reputable place you could buy from online

if you're like me..I go the ghetto route and buy plumbing PVC pipes from Homedepot and cut up the pipes to my specs
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Old 23rd July 2004, 09:02 AM   #5
Maples is offline Maples  United States
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Well unfortunately it is a rather cheap subwoofer. The company that made it, Roadmaster USA, doesn't have any real technical specs on the driver besides this manual

The enclosure is also made by Roadmaster USA. No datasheet or manual this time, at the most you could get information about it from this page, but I did measure the box myself and basically this is what I got 579.176 Cubic Inches which converts to .335 Cubic Feet of internal volume in the enclosure. The driver's manual reccomends over 3x that amount so I guess my measurements are wrong.. but I tried.
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Old 24th July 2004, 07:00 PM   #6
Maples is offline Maples  United States
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Any ideas people?
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Old 26th July 2004, 06:29 AM   #7
Maples is offline Maples  United States
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ooooooooh it's ok peoples, I found that applet, thanks!
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