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kpozr2
07-26-2006, 04:11 PM
okay so here it is. this is what i have to work with, im not changing a thing.

WIDTH- 38 3/4"
DEPTH- 15"
HEIGHT- 12"

this is the state of the box, sanded, wood filler is in.

http://www.imagestation.com/picture/sraid210/p75ec9921e6df59ef79cc3e635d374e45/edcf7b12.jpg
http://www.imagestation.com/picture/sraid210/pa279abc0db6dfbf151f36a808d5383e2/edcf7b0c.jpg

id like ONE port, tuned to 36hz. it can be however wide...pref 3+"

kpozr2
07-26-2006, 04:19 PM
im figuring 4.205 ft. for internal volume without the port. i want to fix this, ship out this box if Army-Killa still wants it, or else ill use it. now for port length.

kpozr2
07-26-2006, 04:30 PM
am i making a slot port??? or have i been making them?? that run along the wall??

kpozr2
07-26-2006, 04:31 PM
port 12X4"------17.4" long gets me 35hz????

kpozr2
07-26-2006, 04:33 PM
12x4-------14.75" long gets me 37hz...is this correct? and where do i measure the port length. down the middle? inside the wall. or around the outside of the port wall?

kpozr2
07-26-2006, 04:34 PM
12x4------16.02" long gets me 36hz. which one???

kpozr2
07-26-2006, 05:30 PM
ok so i punched some numbers...i really could use another opinion, sorry for bothering everyone.....
12"*4"*16"=768
768/1728=.444
4.202-.444=3.75^3 ft....that its about 1.8^3 ft per sub. not with driver displacement yet.....

mikey060
07-27-2006, 01:59 AM
bump hah...lets help this dude get it perfect the second time around:)

kpozr2
07-27-2006, 02:03 AM
it is perfect :)
http://www.imagestation.com/picture/sraid210/p3ee6ddaf38f205e68c86d5ab7248da9f/edce3721.jpg
refer to other thread for pics.

xluben
07-27-2006, 02:05 AM
yeah, you need to use net volume when calculating the tuning, so it's kind of a back and forth until you figure out what you want.

i don't think you can do better than 2.9 cu ft @ 36Hz with a 4"x 12" port.

here ya go:

http://www.subwoofertools.com/forum/ported-box.asp?Ew=40.25&Eh=13.5&Dia=5&Xmax=12.5&Vd=.1&NumW=2&Vb=2.9&Fb=36&Qts=&Vas=&Fs=&CE=0

EDIT: nevermind, i thought you were re-doing the other box too.

how long did you end up making the port?

(make sure you measure like this: port info (http://mobile.jlaudio.com/support_pages.php?page_id=165) )

or, to not confuse you, how long is the second part of the port wall (after the bend) ?

sorry i wasn't around this afternoon to help with the calculations, i was still at work :(

can't wait to hear your new and improved box (and mine!).

kpozr2
07-27-2006, 02:13 AM
it is right around 24" long. thats what i was told to do.

mikey060
07-27-2006, 02:29 AM
ahh i guess i missed something haha. well done

kpozr2
07-27-2006, 02:34 AM
just a couple things...drama. work. drama.