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View Full Version : 2.25 cu. ft at 40 Hz HELP!



RollinRemz05
07-25-2006, 12:02 AM
Can anyone give me plans to a box that has 2.25 cu ft at 40 hz its for a T1 Dual 4 ohm

xluben
07-25-2006, 12:25 AM
http://img34.imageshack.us/img34/5071/2cubes35hz3125sqin5bc.png

shorten the second piece of the port from 14.5" to 4.5" and you get 2.3 cu ft @ 39.3 Hz.

hope that helps!

RollinRemz05
07-25-2006, 12:40 AM
Is that the closest i can get? Im kinda new so I wanna get as close as i can to the specs

SAG3
07-25-2006, 12:42 AM
its pretty much 40.......

xluben
07-25-2006, 12:45 AM
tuning will vary a bit between programs anyways, but if you NEED it tuned a little higher (I don't know why you'd want to tune that high to begin with), you can just take an inch or so off the port length.

RollinRemz05
07-25-2006, 12:57 AM
Well on the RF website it says 2.25 cu ft @ 40 Hz is recommended. Should i go by this or no?

xluben
07-25-2006, 01:10 AM
i'd tune lower

CarlosV
07-25-2006, 07:04 AM
tuning will vary a bit between programs anyways, but if you NEED it tuned a little higher (I don't know why you'd want to tune that high to begin with), you can just take an inch or so off the port length.

Where can i download a program or how do you calculate the plans

xluben
07-25-2006, 09:19 AM
i use hand calculations for volume/dimensions and winisd for tuning.

or you can try this:

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

CarlosV
07-25-2006, 11:22 AM
i use hand calculations for volume/dimensions and winisd for tuning.

or you can try this:

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


thanks :smokin: