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Slammed
02-11-2008, 07:06 PM
External enclosure dimensions: Height 16.5" x Width 21.5" x Top Depth 16" & Bottom Depth 21" (3/4" MDF)

Size of the port: 1 1/2" wide, 15 1/8" long and 15 1/2" deep.


What is my tuning frequency?




:)

bonesninja
02-11-2008, 07:09 PM
whats you net volume after port?

Slammed
02-11-2008, 07:10 PM
I got 2.951 cu. ft. internal volume before port displacement

Slammed
02-11-2008, 07:10 PM
whats you net volume after port?

Im trying to figure that out :)

bonesninja
02-11-2008, 07:10 PM
so you didn't calculate your net volume? thats kind of important to the whole tuning thing

Slammed
02-11-2008, 07:13 PM
I got all messed up :(

Slammed
02-11-2008, 07:14 PM
so you didn't calculate your net volume? thats kind of important to the whole tuning thing

I know....I forgot to do it

:crap:

Slammed
02-11-2008, 07:19 PM
ok...I **** at building ported boxes :(

bonesninja
02-11-2008, 07:20 PM
lol...sorry man...i don't have the energy to calculate your volume....long day at work

Immacomputer
02-11-2008, 07:29 PM
Where is the port located? On the front? Side?

maldecido33
02-11-2008, 07:30 PM
Nm, hold on

MyFartsStink
02-11-2008, 07:35 PM
find out how to calculate it and solve it your self. That usually helps with me.

maldecido33
02-11-2008, 07:37 PM
Don't be a ********.

As stated before, where is the port located?

Blove1991
02-11-2008, 07:41 PM
DONT USE THIS NUMBER

But I threw some numbers together on WinSid and got 2.39 NET at 34hz with one of the port walls being a side wall for the box.

Slammed
02-11-2008, 07:42 PM
port located on the front (right side) of the subwoofer

a typical slot vent



BTW....Im trying to find a certain calculator but couldnt find it ;)

Slammed
02-11-2008, 07:43 PM
DONT USE THIS NUMBER

But I threw some numbers together on WinSid and got 2.39 NET at 34hz with one of the port walls being a side wall for the box.

thanks for your help


thats pretty small for a 15" enclosure :(

bonesninja
02-11-2008, 07:45 PM
port located on the front (right side) of the subwoofer

a typical slot vent



BTW....Im trying to find a certain calculator but couldnt find it ;)

this one?



http://www.carstereo.com/help2/Articles.cfm?id=31

Slammed
02-11-2008, 07:45 PM
this one?



http://www.carstereo.com/help2/Articles.cfm?id=31

:inlove:

Blove1991
02-11-2008, 07:46 PM
Not to thread jack...but I've wondered myself...On an enclosure with a top depth and bottom depth, don't you add the top and bottom and divide by 2? After that do you displace 1.5" for the wood or 3" due it being the top and the bottom?

maldecido33
02-11-2008, 07:47 PM
Making some assumptions about your box design, I'm getting 2.55 Net volume with a tuning frequency of 35.1 Hz

maldecido33
02-11-2008, 07:48 PM
Is the port on the slant or flat side?

Immacomputer
02-11-2008, 07:50 PM
port located on the front (right side) of the subwoofer

a typical slot vent



BTW....Im trying to find a certain calculator but couldnt find it ;)

Is the front angled or the rear? Does the port bend?

Slammed
02-12-2008, 02:56 PM
ooops

sorry guys


the rear is angled


port on the front side

Immacomputer
02-12-2008, 03:12 PM
I got 2.6 tuned to 34hz. The port design is pretty terrible though. When I draw it up, your port panel touches the back wall at the top. This is really constricting to the port and I wouldn't be surprised if it caused some port noise at high volumes around tuning. Tuning might also be significantly lower due to this and because of how skinny it is vs how tall it is.

You can measure the tuning frequency with tones if you really want to know. Play some tones from 25hz to 40hz and watch for when the cone moves the least. This will roughly be the tuning frequency.

Slammed
02-12-2008, 03:12 PM
thank you :)


2.6 is too small for a 15" sub though

the727kid
02-12-2008, 03:58 PM
thank you :)


2.6 is too small for a 15" sub though

I only got 2.75 per 15" BL for mine... sometimes you gotta take what you can get:cool:

ngsm13
02-12-2008, 04:10 PM
~2.45 @~36 hz...

nG