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badandyturbo
12-07-2006, 12:30 PM
4 12's
2.00 cu.ft. recommended per sub
30 sq"x 13"L port area per sub
i have a space about 54" long, 24" wide, and 24" tall
It will repalce the backseat of my truck.

Thanks for the help in advance...:)

rpfuror
12-07-2006, 01:16 PM
mmm.. you want ~48Hz? what frequesncy are you targeting?

Jmabrao
12-07-2006, 01:19 PM
How about this design??



http://i118.photobucket.com/albums/o107/Jmabrao/Design.jpg

Net Volume: 8 cubic feet
Tuning Frequency: 32 Hz
Port Width: 5.5 inches
Port Area: 123.75 Square Inches
Port Length: 31.5 inches

External Dimensions: 24 wide x 24 tall x 47 deep.

Board Dimensions and Quantity
Color Count Width Height
Top and Bottom 2 24 inches 47 inches
Red 1 17.75 inches 22.5 inches
Yellow 1 46.25 inches 22.5 inches
Black 1 22.5 inches 22.5 inches
Green 1 47 inches 22.5 inches
Teal 1 28 inches 22.5 inches

Number of 49x97 Sheets of 3/4" MDF: 1.25

I used Decaf car audio's ported enclosure calculator.

badandyturbo
12-07-2006, 01:56 PM
Nice I like that look. How do you know what the best frequency is?

Jmabrao
12-07-2006, 02:29 PM
This is a general rule of thumb but 30 and under is for sq, 31-38 is Sql, and anything above 38 is SPL. Keep in mind pure SPL will not sound very good

Did you mean the tuning of the box, if so it's a mixture of box size, port size, and port length.

Joel

angrytrucker78
12-07-2006, 02:55 PM
How about this design??



http://i118.photobucket.com/albums/o107/Jmabrao/Design.jpg

Net Volume: 8 cubic feet
Tuning Frequency: 32 Hz
Port Width: 5.5 inches
Port Area: 123.75 Square Inches
Port Length: 31.5 inches

External Dimensions: 24 wide x 24 tall x 47 deep.

Board Dimensions and Quantity
Color Count Width Height
Top and Bottom 2 24 inches 47 inches
Red 1 17.75 inches 22.5 inches
Yellow 1 46.25 inches 22.5 inches
Black 1 22.5 inches 22.5 inches
Green 1 47 inches 22.5 inches
Teal 1 28 inches 22.5 inches

Number of 49x97 Sheets of 3/4" MDF: 1.25

I used Decaf car audio's ported enclosure calculator.

Where'd you find that calculator?

rpfuror
12-07-2006, 03:01 PM
"Decaf car audio's ported enclosure calculator"

http://www.subwoofertools.com/forum/ported-box.asp

it not bad if you have all the exact specs you want.

Jmabrao
12-07-2006, 03:01 PM
http://www.subwoofertools.com/forum/ported-box.asp

oops lol

out of curiosity what kind of subs are they going to be???

Joel

angrytrucker78
12-07-2006, 03:03 PM
Oh, haha. I thought there was one that gave you that diagram. I know about that calculator. Thanks though!

Jmabrao
12-07-2006, 03:08 PM
I modelled it using rhinocerus, I cant get the hang of sketchup.