View Full Version : Very confused with ports

07-05-2005, 05:02 AM
i have about 1 ft^3 for one 10" jl w3v2. its probably a little less, but im going to stuff a little polyfill. i want to tune to 30-33 hz. but how to figure out the length of the port is killing me.

can someone help me out. i want my slot port to be 8"X1" or if anything else that is more suitable for the tuning.

i dont have much room to mess with cause i have a small car. the box is already made but not completly put together(my first ported box). its downfiring and the want the port to be facing upwards or out the side of the box. i will even go with a round port if its easier for this build.

is this site accurate at all?

anything helpfull is appreciated. thank you.

07-05-2005, 05:23 AM
JL has a tutorial on their site that works great, if you dont **** at math :crap:
Round ports are so incredibly easy to do its funny

07-05-2005, 05:42 AM
i might just be doing that(round pvc ports).

but on that site that i listed, it says the minimum diameter i sould be using is 4.7 or something. when i try to calculate port length, its incredably way too long.

cant i just use a 2" diameter pvc pipe? the length is going to be less than 10 inches.

Moe Lester
07-05-2005, 01:07 PM
8x1 or 2" PVC is too small. you are going to HAVE to bend the port.

07-05-2005, 03:24 PM
JL provides box plans with the manual that comes with your sub.