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coolahan
02-12-2007, 12:37 AM
So I'm planning on getting a couple 12" Orion HPs.. Well I decided I was going to try and make a design for it this time... well I did.. but I don't know the tuning formula and I would like to know if this plan would work fine.. so basically my question is what is it tuned to and will it work fine.. and are my calculations right.

External Dimensions:
Width - 36"
Depth - 20"
Height - 16"

Its double baffled to help the flexing effect... I haven't taken out port displacement but I did take out my subwoofers displacement and it comes out to be 4.94 cu ft...

http://i18.photobucket.com/albums/b140/coolahanx/12s-Box.jpg
its not marked but the port goes back 14 1/4".... so what would it be tuned to?

Opinions and advice are welcome! :)

j3bus2k3
02-12-2007, 12:40 AM
How can you design a box around an aribtrary port length? Shouldnt that be on the MAIN things to consider when designing a box since that is an integral part of said design?

fwb_1234
02-12-2007, 02:21 AM
at 14.25 you are definitely tuned above 40hz. 16 tunes you to 40.

vladd
02-12-2007, 02:32 AM
you're at about 46hz the way you have it, 2.2cubes/sub
fyi, by my calculations it would take 24.75" length to get you to 40hz and leaves you with just under 2cubes/sub

coolahan
02-12-2007, 04:56 AM
thanks guys!! can anyone maybe come up with a design for me 2 cubes per sub... tuned at 37hz... displacement on each sub is .096 cu ft... max dimensions are 37 width, 18 height, 22 depth... would greatly appreciate it fellas... i sort of want the same kind of design if possible.. or just come up with one that you think looks good :) seriously guys i would great appreciate it..




edit: its for 2 12's.. 11" cutout... 12.25" basket

rpfuror
02-12-2007, 09:58 AM
Here you go man. This one is acurate 4cu/ft @ 37 hz

http://i135.photobucket.com/albums/q145/rpfuror/Box%20Design/4cuft37hz.jpg

IonSQL
02-12-2007, 10:19 AM
How far back do those port walls go?

rpfuror
02-12-2007, 03:32 PM
14.5 + 1.75 + double baffle

IonSQL
02-12-2007, 03:41 PM
If you're going to do a center port like that, then the width across the back wall needs to be 1/2 of the main port width i.e. 2.5", not 5"

bjfish11
02-12-2007, 03:42 PM
I got 46 hz on the original as well.

PV Audio
02-12-2007, 04:51 PM
Here you go man. This one is acurate 4cu/ft @ 37 hz

http://i135.photobucket.com/albums/q145/rpfuror/Box%20Design/4cuft37hz.jpg
But...no.

If you do a intrabaffle port, your rear port width must be half the width of the main port.

IonSQL
02-12-2007, 04:55 PM
But...no.

If you do a intrabaffle port, your rear port width must be half the width of the main port.

Kinda like what I said, only you used a fancy word :D

PV Audio
02-12-2007, 05:10 PM
Yeah, I didn't see that you posted that, just responded after looking.

And i made the word up on the spot :laugh:

IonSQL
02-12-2007, 05:12 PM
haha sounded good to me, guess that's what we'll call it from now on :D

coolahan
02-13-2007, 03:31 AM
thanks guys :) appreciate it very much!

coolahan
02-13-2007, 06:49 AM
DAMMMMMMMMMMMMMIT I was misinformed the box needed to be 3 cubes after displacement.. ****.. sorry guys!!!!!!!!!!!!!

Lonewolf32
02-13-2007, 09:20 PM
Is this what you are looking for, I can not see the pictures you posted at work. I guess IT does not like photobucket for some reason.

http://www.caraudio.com/gallery/2/8/9/3/3/centerport.jpg

coolahan
02-13-2007, 10:00 PM
**** that looks ****.. brings ideas for my box :) thanks bro.