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DFW40
01-29-2009, 06:40 PM
I got my calculations from the 12volt.com. If anyone can double check these I would appreciate it.

Box

W=29
H=11.75
D=10

Port

W=1.6
H=10.25
D=23

Sub Displacement .05

dman4486
01-29-2009, 06:41 PM
I got my calculations from the 12volt.com. If anyone can double check these I would appreciate it.

Box

W=29
H=11.75
D=10

Port

W=1.6
H=10.25
D=23

Sub Displacement .05

What is there to check? you gave some dimensions and a sub displacement:confused:

DFW40
01-29-2009, 06:41 PM
I got my calculations from the 12volt.com. If anyone can double check these I would appreciate it.

Box

W=29
H=11.75
D=10

Port

W=1.6
H=10.25
D=23

Sub Displacement .05

I came up with roughly 1 cube tuned to 40hz

dman4486
01-29-2009, 06:45 PM
port displaces .218cube + wood thickness

so depending on your wood, it is ~1.7cubes after sub and port

working on the tune

DFW40
01-29-2009, 06:48 PM
According to the 12volt.com without port displacement or woofer displacement I am at 1.38 cubes.

10 X 29 X 11.75

dman4486
01-29-2009, 06:50 PM
According to the 12volt.com without port displacement or woofer displacement I am at 1.38 cubes.

10 X 29 X 11.75

multiply those three numbers together
3 407.5 (cubic inches) = 1.97193287 cubic feet

then it all depends on wood thickness

perfecxionX
01-29-2009, 06:52 PM
if your using 3/4" mdf and 29x11.75x10 are your external dimensions, then i calculated 1.0159 after port and sub displacement

sounds right

DFW40
01-29-2009, 06:53 PM
if your using 3/4" mdf and 29x11.75x10 are your external dimensions, then i calculated 1.0159 after port and sub displacement

That is what I got roughly and I used .75 MDF.

DonH
01-29-2009, 07:20 PM
am i the only one notice'n that that port is WAAAAAAAY to SMALL! 16.4 square inches of port area! r u mad? bro atleast 30. even with a small box

DFW40
01-29-2009, 07:47 PM
am i the only one notice'n that that port is WAAAAAAAY to SMALL! 16.4 square inches of port area! r u mad? bro atleast 30. even with a small box

It is a 8 inch sub and it is exactly what DD recommends. Most places would suggest a 3 inch aeroport which would still work fine for daily driving. 30 inches for an 8 inch sub would be like almost having 3 4 inch aeroports which would be a bit overkill. Bro

dman4486
01-29-2009, 08:02 PM
am i the only one notice'n that that port is WAAAAAAAY to SMALL! 16.4 square inches of port area! r u mad? bro atleast 30. even with a small box

each of my tens has a 1-1/4 by 12" port in a 2cube enclosure:fyi:


and I get ZERO port noise