Could somebody help me to design an enclosure for the Fi BL 18 inch.

I'm not good with the programs.

I would like to let the box tuned to around 32 - 30 hertz.

I'm gonna power it with around 1800W RMS.

If somebody tell me the volume of the box and the port lenght and also the port area.

BJ at Fisher customs offer a box deisgn for a good price just goto the site

Here's one: 8 cubic feet (after port and sub displacement), 80 sq. inches of port, 19" long. that gives you 32 hz. port displacement- a little under 1 cube (dependent on how you make it, of course), sub displacement- 0.23. So make it about 9.2 cubes total. 22.5" long port gives you a tune of 30 hz. I'll let you figure out displacement if you do that.

let's start from what car do you have? and which amp are you going to use?

A Sinuslive SLa 3000, it has 2662 Watts RMS at 1 ohm.

Here's one: 8 cubic feet (after port and sub displacement), 80 sq. inches of port, 19" long. that gives you 32 hz. port displacement- a little under 1 cube (dependent on how you make it, of course), sub displacement- 0.23. So make it about 9.2 cubes total. 22.5" long port gives you a tune of 30 hz. I'll let you figure out displacement if you do that.

thanks for the info actually this was all i needed.