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Old 07-28-2011, 01:53 AM
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Default possible 4th order for sa 12s. i need some help.

this is my first time designing a 4th order so im welcome to any help and criticism you guys have. how does 1 cube sealed 3 cubes ported tuned to 45 hz sound for a 4th order?
its for 2 sa 12s that are in my maxima. people told me to make my current box bigger to do better on the meter but im not sure if i would be able to so i thought id try a fourth order.
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Old 07-28-2011, 04:10 AM
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It sounds like you havnt a clue what youre doing.. :/

For a general starting point, Id say a sealed QTC/.7 alignment. Try it with the same size front chamber.. this MAY get you in the area of correct. Should get you closer than what you have, but is NOT by any means the proper way to design one.

What type of output are you looking for? I can do them, but not for free.
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Old 07-28-2011, 07:22 AM
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Quote:
Originally Posted by Craig28 View Post
this is my first time designing a 4th order so im welcome to any help and criticism you guys have. how does 1 cube sealed 3 cubes ported tuned to 45 hz sound for a 4th order?
its for 2 sa 12s that are in my maxima. people told me to make my current box bigger to do better on the meter but im not sure if i would be able to so i thought id try a fourth order.
I'd say that's a good place to start, assuming that's per sub. .5 sealed per 12 is very very small. I ran .5 sealed per 10 in my last 4th order. You would want at least 1.5 cubes sealed net for those subs.
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