Port tube questions
Thread Starter
On The Tree
Joined: Aug 2005
Posts: 106
Likes: 0
Port tube questions I have a JL Audio 12w3v2 and a sub box with 1.8 cu ft of space that fits in the trunk area of my TA. I would like to port the box and tune it to 30.3 Hz. The JL book shows a 1.75 cu ft. sub box with a rectangular port that is 1.375" tall x 12.5" high and 21.5" long for a total of 369 cubic inches tuned to 30.3 Hz. I can't find a port tube that has that much internal volume, so I was considering the possibility of using 2 port tubes to total 370 cubic inches. The only thing I'm not sure of is what determines the frequency of the port and how it would need to be changed to achieve 30.3 Hz with a box that is .05 cu ft larger. Would I simply use 2 ports of half of the required volume... and how do I know how much port volume I need to get 30.3 Hz in a 1.8 cu ft box?
search for and download winisd .
port tuning is an exact science.. even small variances can greatly effect the tuning freq.
I may be wrong, been awhile since I calculated a ported box, but I thought it was surface area of the port, not internal volume that determined its tuning freq.
port tuning is an exact science.. even small variances can greatly effect the tuning freq.
I may be wrong, been awhile since I calculated a ported box, but I thought it was surface area of the port, not internal volume that determined its tuning freq.
Originally Posted by Mike @ FbodyAudio
search for and download winisd .
port tuning is an exact science.. even small variances can greatly effect the tuning freq.
I may be wrong, been awhile since I calculated a ported box, but I thought it was surface area of the port, not internal volume that determined its tuning freq.
port tuning is an exact science.. even small variances can greatly effect the tuning freq.
I may be wrong, been awhile since I calculated a ported box, but I thought it was surface area of the port, not internal volume that determined its tuning freq.
Evenrything needs to be perfect when it comes to porting. You had it right when u said its an exact science... Designing gives me head aches sometimes
Thread Starter
On The Tree
Joined: Aug 2005
Posts: 106
Likes: 0
I found a website with a calculator for port length and diameter.
http://www.carstereo.com/help/Articles.cfm?id=31
http://www.carstereo.com/help/Articles.cfm?id=31
Teching In
Joined: Jan 2007
Posts: 22
Likes: 0
From: Platte, SD
Download winisd from linearteam.org(i think, you might have to search google) and READ THE GETTING STARTED GUIDE!!!!! You will be a tunin' machine if you can understand everything...it gets pretty technical
Trending Topics
Originally Posted by zorrander
I found a website with a calculator for port length and diameter.
http://www.carstereo.com/help/Articles.cfm?id=31
http://www.carstereo.com/help/Articles.cfm?id=31
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
