View Full Version : Round Port Tuning Question.
I was going to try a round port this time. I was using the calculator off of the 12 volt site.
http://www.the12volt.com/caraudio/boxcalcs.asp
For a 2.5 cubes box tuned to about 32hz it calls for a 4 in dia tube 10 inches long. That seems like such a small port for one 12" type-x. Should i use more than one tube or what? If i do use more than one tube, then how do i figure out the tuning?
Big Dee
10-30-2006, 12:22 AM
I would use 2 4" ports, that would give you very low port velocity. They would have to be 23" long, each.
Whats the advantage of a lower port velocity? And thats a bit longer than what i can buy with flared ends. What if i used three? How are you coming up with your length? Sorry for the question flood there.
Big Dee
10-30-2006, 12:35 AM
Whats the advantage of a lower port velocity? And thats a bit longer than what i can buy with flared ends. What if i used three? How are you coming up with your length? Sorry for the question flood there.
Lower port air velocity = less port noise, or no port noise.
3 ports would be even longer, if you can't fit 2 there's no way you'll be able to fit 3.
I use WinISD for calculating port length.
If you can't fit 2 4" ports you could go with a single 5". That would need a 16.6" length.
Lower port air velocity = less port noise, or no port noise.
3 ports would be even longer, if you can't fit 2 there's no way you'll be able to fit 3.
I use WinISD for calculating port length.
If you can't fit 2 4" ports you could go with a single 5". That would need a 16.6" length.
cool thanks alot.