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View Full Version : how much port length and port area for 12" MAG?



UNDERGROUND_BUM
04-23-2008, 12:48 AM
so exactly wat the title says for old style mags......... been looking around for a while what performs the best?

UNDERGROUND_BUM
04-23-2008, 03:18 AM
bump

dragnix
04-23-2008, 03:28 AM
did you try SI's website? I would imagine they would still have the specs up.

dragnix
04-23-2008, 03:34 AM
meh, guess they don't. I have my 15" in a 3cu. ported box tuned to 30hz. Port area is 36sq. in. and length is around 13(?), not too sure about that. And it sounds fine to me.

RAM_Designs
04-23-2008, 03:35 AM
put the 12"er in 2.25ft^3 tuned to 32-33hz with 25-30in^2 of port.

UNDERGROUND_BUM
04-23-2008, 03:55 AM
25-30 in. total port length? or port area?

RAM_Designs
04-23-2008, 03:57 AM
25-30 in. total port length? or port area?

area. Depending on how you make your port(13x2 or 5x5 for example), is going to affect your length. The more square you get, the shorter it needs to be compared to something more rectangular.

UNDERGROUND_BUM
04-23-2008, 04:05 AM
thanks for clarifying that. how much length should be given? or does it matter?


thanks alot ryanM923

RAM_Designs
04-23-2008, 04:08 AM
thanks for clarifying that. how much length should be given? or does it matter?


thanks alot ryanM923

use the calcs over at carstereo.com and tinker with everything...good way to learn how things work.

http://www.carstereo.com/help/Articles.cfm?id=45
http://www.carstereo.com/help/Articles.cfm?id=31

UNDERGROUND_BUM
04-23-2008, 04:14 AM
sorry im really lost. im using the http://www.reaudio.com/speaker_box/LPort_Box_Calc.html

my width is 40
hieght is 14
boths depths are 13.75
wood thickness is .75
and i want to tune about 33 hz

if somebody could tell me what to fill in for the port width and port length 2, i would really be thankful. im somewhat confused .............
and if u want to make box smaller could u take away from the depth.......

UNDERGROUND_BUM
04-23-2008, 01:14 PM
bump

SPY
04-23-2008, 01:36 PM
I just built a box for one of these last week.



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