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View Full Version : Anyone Want To Help Me With A Box Design?



Jonahdude
10-22-2004, 02:51 AM
I'm looking to build a ported box for 2 Pioneer TS-W305 subwoofers, but I'm not sure exactly how to make it. I want around 1.4 ft^3 net volume per sub, and tuned to around 30hz. I'm not sure if I should make the port out of PVC pipe or make a slot port, I have no idea how to make slot ports and I don't know how to figure port displacement for the PVC pipe. Would someone like to design a box for me, or at least point me in the right direction? I drive a 1994 Sentra, so trunk space is pretty limited.

supa_c
10-22-2004, 02:53 AM
Would you be willing to spend $8 for someone to do it all for you ?

Jonahdude
10-22-2004, 02:57 AM
Do all what for me?

supa_c
10-22-2004, 03:17 AM
The design.
All you would need to do is make the box out of wood

Jonahdude
10-22-2004, 01:17 PM
$8? Not really. Really all I need is to know how to calculate port displacement. I'm going to be using 4" PVC pipe for the port.

req
10-22-2004, 01:51 PM
its a little tougher than you think buddy.

monte_carlo97
10-22-2004, 02:50 PM
not exactly the easiest of things to do. you need to have a good idea what you are doing.

BulldogSr04
10-22-2004, 03:40 PM
Or you could get it for free by doing my ipod link :thumbupw:

I can teach you too, just ^^^

Jonahdude
10-22-2004, 03:40 PM
not exactly the easiest of things to do. you need to have a good idea what you are doing.

Well I'm willing to learn, everyone has to start somewhere. I'm definitely a DIY kind of guy, I'm not about to pay someone to do something that I'll probably enjoy doing myself.

Simos
10-22-2004, 03:48 PM
If you know what frequency and box volume you want to use you still need to have an idea of what size port you want to use (cross sectional area). For instance, with 2.8 ft^3 net box volume, tuned to 30 Hz, using a 4" diameter pvc pipe, the pipe would have to be 10.5" long.

Simos
10-22-2004, 03:49 PM
Check this link out I put on ICIX, might help you out.

http://www.icixsound.com/vb/showthread.php?t=5028

Jonahdude
10-22-2004, 03:58 PM
If you know what frequency and box volume you want to use you still need to have an idea of what size port you want to use (cross sectional area). For instance, with 2.8 ft^3 net box volume, tuned to 30 Hz, using a 4" diameter pvc pipe, the pipe would have to be 10.5" long.

I know that, but how much air would 10.5" of 4" PVC pipe displace?

Simos
10-22-2004, 04:47 PM
area of 4" pipe = (Pi)*(radius^2) = (3.14)*(2^2) = 12.56 in^2

volume of 4" pipe, 10.5" long = (12.56in^2) * (10.5in) = 131.88 in^3

convert cubic inches to cubic feet ---> 131.88/1728 = .076 ft^3

Jonahdude
10-22-2004, 05:11 PM
area of 4" pipe = (Pi)*(radius^2) = (3.14)*(2^2) = 12.56 in^2

volume of 4" pipe, 10.5" long = (12.56in^2) * (10.5in) = 131.88 in^3

convert cubic inches to cubic feet ---> 131.88/1728 = .076 ft^3

Alright thanks, with that formula making a ported box shouldn't be too hard. :)

monte_carlo97
10-22-2004, 10:52 PM
Well I'm willing to learn, everyone has to start somewhere. I'm definitely a DIY kind of guy, I'm not about to pay someone to do something that I'll probably enjoy doing myself.
Then i would not be the one to teach you b/c i am not good at it myself. Just play arround with programs like winisd.

kjwiehoff
10-22-2004, 11:15 PM
Alright thanks, with that formula making a ported box shouldn't be too hard. :)

i just did my first one and loved it. you should find it considerably easier doing a tube port than a slot port. i applaude you for wanting to do it yourself. looks like you have the dimensions you need so have fun!

Jonahdude
10-23-2004, 01:34 AM
i just did my first one and loved it. you should find it considerably easier doing a tube port than a slot port. i applaude you for wanting to do it yourself. looks like you have the dimensions you need so have fun!

Thanks man. I'll let you guys know how it goes!

sumone
10-23-2004, 01:54 AM
Well I'm willing to learn, everyone has to start somewhere. I'm definitely a DIY kind of guy, I'm not about to pay someone to do something that I'll probably enjoy doing myself.

x2 on that...I see a lot of people here just saying grab this or that program or calculator to have it figured out for you...blah