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Port Length


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mark241 
Copper - Posts: 101
Copper spacespace
Joined: March 23, 2003
Posted: April 02, 2003 at 6:41 PM / IP Logged  
Does anyone have somesort of chart that allows you to find the port length of a box with port width, volume, tuning frequency, and driver size?
(other than the one on this site)
wrencher_25 
Copper - Posts: 101
Copper spacespace
Joined: March 23, 2003
Location: Canada
Posted: April 02, 2003 at 7:26 PM / IP Logged  

I don't know of any chart like that....but if you're looking to design a port, i'm going through my grad book from Mobile Dynamics in Toronto. (I gotta keep up to date too!!!  Port Length - Last Post -- posted image. ) And i'll give you some of the things that we learned and they told me from my notes. (They're just small pointers when designing a ported box).

-In a vented box, the port length shouldn't be more that 4x it's diameter.

(DON'T USE AS A RULE BUT IN GENERAL......) >>>>

8" = 1-2" in diameter
10" = 2-3" in diameter
12" = 3-4" in diameter
15" = 4-8" in diameter

-I'm guessing that you wanted the chart to aviod formulas...but if you just hate math or anything like that I could help you out on them or do em for ya if you wanted. Just give me the specs that I need from the type of driver you are using. Hope that helped a bit....

Andrew Weitzel
MECP First Class Installer
Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: April 02, 2003 at 10:33 PM / IP Logged  

https://www.the12volt.com/caraudio/boxcalcs.asp

Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

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