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View Full Version : Here's a challenge for you..



Punk In Drublic
05-20-2007, 01:51 PM
Can someone try to figure out the volume and tuning of this box I just designed?

Two Type Rs will be going in it, specs for the speakers are here:
http://www.crutchfield.com/S-Wdv7igprZFR/cgi-bin/ProdView.asp?g=520&id=features_and_specs&i=500SWR1242

Here's the measurements/pics of the box:
(This is going to be built with .75" mdf)

Outside dimensions: 31.5 W x 15 H x 28.5 L

Thanks a million!

Edit: Just realized some of the numbers in pic 1 are hard to read.
The measurement of the right angle piece of the port (Under the 14 5/8) is 3 1/4"
The port length (From front of box to back port piece) is 25 1/4"
Length from back wall to right angle port piece is 2 1/2"


Everything else is pretty readable. Any questions just ask.

PV Audio
05-20-2007, 02:26 PM
So let me understand this. You're asking us to find out what your design is? You should have a design before you model anything, otherwise, it isn't really a design...

People need to realize that 3D modeling is NOT box designing, it is for visualization purposes only.

Punk In Drublic
05-20-2007, 02:28 PM
Alright... is there a free way to design a 2-chamber ported box that you can choose what to tune it to?

PV Audio
05-20-2007, 02:35 PM
Yes, but if I may assume by you making this thread, you probably wouldn't want to take the time to learn how to do it anyway.

Punk In Drublic
05-20-2007, 02:38 PM
Hah, I have all the time in the world. Is it a computer program or a series of equations/something of the like?

PV Audio
05-20-2007, 02:51 PM
http://www.diysubwoofers.org/prt/ported1.htm

http://www.diysubwoofers.org/misc/portcal.htm

There you go.

billy18bm
05-20-2007, 05:16 PM
lmao he just made a box and guessed on the port length now he wants us to calculate it but dosent even tell us the port length

AVX Mike
05-20-2007, 05:20 PM
Try finding bass box pro. Great program I found mine for free online. I've tried a few others, but bbp works for me.

DejaWiz
05-20-2007, 05:42 PM
Try finding bass box pro. Great program I found mine for free online. I've tried a few others, but bbp works for me.


Hmmmm... isn't that program $129?

AVX Mike
05-20-2007, 06:52 PM
HMMM I've also seen it list for $299, what is the point.

DejaWiz
05-20-2007, 07:18 PM
HMMM I've also seen it list for $299, what is the point.

point being, getting software with a price tag from the internet for free = stealing, right?

http://www.ht-audio.com/bassbox.htm

PV Audio
05-20-2007, 08:06 PM
Stealing, smealing. That isn't the real issue bass box pro is only as accurate as the person using it. The numbers it gives you are NOT actual numbers, and they are not accurate for anything but sealed boxes. You need to use math to design a box, not a few mouse clicks. Otherwise, you aren't really designing.

Trixter
05-21-2007, 01:03 PM
Stealing, smealing. That isn't the real issue bass box pro is only as accurate as the person using it. The numbers it gives you are NOT actual numbers, and they are not accurate for anything but sealed boxes. You need to use math to design a box, not a few mouse clicks. Otherwise, you aren't really designing.

lol...right