Ive been thinking about getting some pvc to port my box with. I went to 12v and used the calculator and it said for a 2" port it would be a 1 1/2 long? Maybe im doing something wrong idk any help would be gratefully appreciated.

my box has 2.5 cu/ft

its sizes are (trapezoid)

48" long
7" wide at bottom
5" wide at top
18" tall

 

does this sound about right?

 

I'd say that short port is way way off. I'm having a ported box designed by a pro and the port going to be nearly 26" long and around 6" square. But that's just a guess from the rough design pics he sent me. You might email dylan AT fishercustoms.com

GCW's screenshot could be right but I'm no expert. That's why I emailed Dylan =).

Oh..He does this for a living so he may want a few dollars to figure this out for you.

 

a smaller port opening needs less port length, but you have more port noise with a small opening.

 

ok so i just plugged in a (1) 4" pipe it says 10" long? im want to put it on one side of the box instead of the the front will that matter?

 

a port on the side should be fine or you could do a slot port starting at the bottom front and 90 up the back wall to get the rest of your length. (1) 4" port 9.6" long = 33 HZ according to winisd, seems to be the same as what you came up with.

 

RE Audio's website has the best port calculator Ive seen online.

reaudio.com