Jroo 10+ year member
CarAudio.com Elite
After looking at a bunch of t lines and forums, I thought I would try one. I found a site that had some simple math that I followed and want to know what you think. Mind you I am using a cheap
10" sub with Fs around 30hz.
For line lenght I followed this:
Speed of sound (1130 ft/sec) divided by subs Fs and then divided by 4 again. Gave me 9.4 feet
For port area I followed this:
pi x radius x radius. (middle of dustcap to middle of surround) My sub ended up being 5" roughly.
3.14 x 5 x 5= 78.5. So my port area would be 78.
So I would have a T line about 9 feet long or slightly shorter with a port of 78. This look right so far to you guys.
10" sub with Fs around 30hz.
For line lenght I followed this:
Speed of sound (1130 ft/sec) divided by subs Fs and then divided by 4 again. Gave me 9.4 feet
For port area I followed this:
pi x radius x radius. (middle of dustcap to middle of surround) My sub ended up being 5" roughly.
3.14 x 5 x 5= 78.5. So my port area would be 78.
So I would have a T line about 9 feet long or slightly shorter with a port of 78. This look right so far to you guys.