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calculator for port size and length of box or tube

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Sound Pressure 
Silver - Posts: 711
Silver spacespace
Joined: March 09, 2002
Location: United States
Posted: November 01, 2002 at 1:36 AM / IP Logged  

Hey 12volt,

Wondering if there is someway to add a calculator to find the correct size and length of a port for a box or tube given the measurements? Might be another helpful tool.

Sound Pressure
You know you have the right amount of pressure when your eyes start to water! Now you've got Juice!
the12volt 
Administrator - Posts: 3,955
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Joined: March 07, 2002
Location: Louisiana, United States
Posted: November 02, 2002 at 12:17 PM / IP Logged  

Hi Sound Pressure, great idea! I use a port tuning nomogram to determine port sizes based on desired port frequency and the volume of the enclosure. I'll scan one and upload it for you. If I can find a mathamatical formula, I can write a calculator for everyone to use. I'll keep you posted.

the12volt

Sound Pressure 
Silver - Posts: 711
Silver spacespace
Joined: March 09, 2002
Location: United States
Posted: November 02, 2002 at 10:08 PM / IP Logged  
Thanks 12volt I appreciate it.
Sound Pressure
You know you have the right amount of pressure when your eyes start to water! Now you've got Juice!
the12volt 
Administrator - Posts: 3,955
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Joined: March 07, 2002
Location: Louisiana, United States
Posted: November 04, 2002 at 5:21 PM / IP Logged  

Here ya go Sound Pressure: Port Tuning Nomogram  I believe I found an equation that will provide the same results. When I have time, I'll try it out and if successful, I'll write a calculator for everyone to use.

the12volt

Sound Pressure 
Silver - Posts: 711
Silver spacespace
Joined: March 09, 2002
Location: United States
Posted: November 07, 2002 at 12:45 AM / IP Logged  

calculator for port size and length of box or tube -- posted image.Thanks again 12volt,

So much time and headaches you have saved. I will download it once I get home today.calculator for port size and length of box or tube -- posted image.

Sound Pressure
You know you have the right amount of pressure when your eyes start to water! Now you've got Juice!
the12volt 
Administrator - Posts: 3,955
Administrator 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 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 07, 2002
Location: Louisiana, United States
Posted: November 07, 2002 at 9:34 AM / IP Logged  
Hi Sound Pressure, you're welcome, glad I could help ;)
Sound Pressure 
Silver - Posts: 711
Silver spacespace
Joined: March 09, 2002
Location: United States
Posted: November 17, 2002 at 7:25 PM / IP Logged  

Hey 12volt,

I have a little trouble opening the program. It won't opencalculator for port size and length of box or tube -- posted image.calculator for port size and length of box or tube -- posted image. I have saved it to a floppy but still can not open it. Please help.

Sound Pressure
You know you have the right amount of pressure when your eyes start to water! Now you've got Juice!
the12volt 
Administrator - Posts: 3,955
Administrator 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 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 07, 2002
Location: Louisiana, United States
Posted: November 17, 2002 at 8:05 PM / IP Logged  
Sound Pressure, you need to unzip it with your favorite zip utility: WinRAR, WinZip, PKZip.  The file contains a printable nomogram and instructions.
Sound Pressure 
Silver - Posts: 711
Silver spacespace
Joined: March 09, 2002
Location: United States
Posted: November 17, 2002 at 11:50 PM / IP Logged  
Can you tell that I was really lost! Thanks 12volt, I will try that in the morning when I get home from work.
Sound Pressure
You know you have the right amount of pressure when your eyes start to water! Now you've got Juice!
the12volt 
Administrator - Posts: 3,955
Administrator 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 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 07, 2002
Location: Louisiana, United States
Posted: November 18, 2002 at 12:55 PM / IP Logged  

Not a problem. Once you unzip it, print a copy of the namogram each time you want to use it, follow the instructions I included, and you should be set.

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