ported boxes

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sbrock

Member - Posts: 42

Joined: February 03, 2004

Location: United States

Posted: February 03, 2004 at 10:01 PM / IP Logged

In the port length calculator section it says to find the length of the port L= 14630000*(D/2)*(D/2)/fb*fb*vb*1728-1.463(D/2) I feel this is a real good formula its the one I have always used to figure of port dimension but my problem is when I type in the numbers in the blanks to find out the length I dont think it subtacts the 1.463(d/2) and I was wondering if anyoune else has discovered that and if so am I right or am I not doing my math correctly maybe someone can help me

kingfridae

Member - Posts: 6

Joined: January 02, 2004

Location: United States

Posted: February 03, 2004 at 10:41 PM / IP Logged

SBROCK I have wondering the same thing. The calculator on this site is nice but It seems to not do the subtraction shown in the formula... Does anyone know how to help us with this? Im hoping the 12volt moderators or someone with knowledge about this calculator can help us. It does make a difference on what frequency your box is tuned at. HELP!

kingfridae

Member - Posts: 6

Joined: January 02, 2004

Location: United States

Posted: February 03, 2004 at 10:42 PM / IP Logged

SBROCK I have been wondering the same thing. The calculator on this site is nice but It seems to not do the subtraction shown in the formula... Does anyone know how to help us with this? Im hoping the 12volt moderators or someone with knowledge about this calculator can help us. It does make a difference on what frequency your box is tuned at. HELP!

geepherder

Platinum - Posts: 3,668

This member consistently provides reliable information

Joined: October 27, 2003

Posted: February 04, 2004 at 12:07 AM / IP Logged

I just posted a question to the moderators in the Forum Help & How To's. I haven't used the port length calculator, just was reading through the new posts. We'll see what happens.

My ex once told me I have a perfect face for radio.

TDean

Member - Posts: 32

Joined: September 12, 2003

Location: United States

Posted: February 04, 2004 at 12:15 AM / IP Logged

http://www.carstereo.com/help/articles.cfm Check here. This may not be any better. Never used it.

sbrock

Member - Posts: 42

Joined: February 03, 2004

Location: United States

Posted: February 04, 2004 at 8:39 AM / IP Logged

Is there not anyone esle out there who has expierenced the same problem or am I adding wrong when I work out the formula on paper because I keep coming up with the same thing and it dont match the calculator unless I leave off the -(1.463*(D/2)) I would really like to find out can someone please help me with this

geepherder

Platinum - Posts: 3,668

Joined: October 27, 2003

Posted: February 04, 2004 at 10:42 AM / IP Logged

Read this post:

https://www.the12volt.com/installbay/forum_posts.asp?tid=25814&PN=1&tpn=1

My ex once told me I have a perfect face for radio.

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ported boxes

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