Fi BL 18" Port Design

[RobClay 20]

I got the 18" dual 2 ohm, cooling, and daily.

I didn't get the flatwind because I read on this forum somewhere that it is preferably used for SPL application.

ok good.

lol and i think your talking about extreme lead.

[kschutz 0]

I got the 18" dual 2 ohm, cooling, and daily.

I didn't get the flatwind because I read on this forum somewhere that it is preferably used for SPL application.

ok good.

lol and i think your talking about extreme lead.

Fi BL Technical

Flatwind: The flatwire coil option simply helps the power handling of the sub. The coil has more surface area to dissipate heat and will take more power then the regular round wire coil that comes in the

[RobClay 20]

Fi BL Technical

Flatwind: The flatwire coil option simply helps the power handling of the sub. The coil has more surface area to dissipate heat and will take more power then the regular round wire coil that comes in the

[kschutz 0]

oh yeah when I was trying to research box designs and what not one of the more recent topics has the guy choosing SPL because it sounded cool.

everyone makes mistakes but if you are a n00b to subwoofers it can cost you.

I may be a n00b to installing sound systems because I have never done one, but I do know what is what... or at least I am learning.

I have a good understanding of basically everything that needs to go into getting good output out of a sub and the difference between blowing out your windows and still hearing the highs and having the lows hit hard at the same time

[RobClay 20]

mhm. it happens all the time

atleast you researched before you bought

[kschutz 0]

any confirmation on the reply about the picture above?

[christobear 0]

quick question, and sorry to thread jack, but when you calculate the area of the port according to the box volume; is that by net volume after port displacement, or is that gross volume of the box?

[kschutz 0]

quick question, and sorry to thread jack, but when you calculate the area of the port according to the box volume; is that by net volume after port displacement, or is that gross volume of the box?

this might help

it matches pretty close to what danieln_88 was saying.

I still don't know where the length is.

so if anyone could label my picture above it would help a lot

[dbjunior 0]

before displacement you get 8.62cuft with a port 18.5hx8w you want a port length 35in so a is 8w b is 12L c is 23L. total port displacement is 2.99cu leaving you with 5.62cu before sub displacement. i hope that helps.

[christobear 0]

quick question, and sorry to thread jack, but when you calculate the area of the port according to the box volume; is that by net volume after port displacement, or is that gross volume of the box?

this might help

it matches pretty close to what danieln_88 was saying.

I still don't know where the length is.

so if anyone could label my picture above it would help a lot

didnt really answer my question.

k, so hypothetically, i have a box that is 7ft before any displacement and 5ft after all displacements.

do i want to have 112in^2 (7*16) or 80in^2 (5*16) of port area?