Maybe someone can check to make sure I've calculated correctly. I have a very irregularly shaped box and it is very difficult to verify airspace. I have roughly calculated it to be about 2 cubes possibly ranging from 1.8 to 2.2.
Using a 4 inch port 15 inches long...
1.8 = 32.4 Hz 2 = 30.7 Hz 2.2 = 29.29 Hz
Also, you're supposed to have the port on the same plane as the sub correct? What if it is much easier to fit the port on a plane perpindicular to the sub? What problems may arise?
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Posts: 185 | From: Dijon, France | Registered: Jun 1999
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posted
Alot of people in car audio say you must place the port on the same plain as the woofer. I try to when it can fit. However in home audio most go by the quarter wave theory. I tend to agree with this train of thought. As long as the port is within a quarter wave of the sub it really doesn't make a difference. JMO
------------------ ******************* Founder: Street Sounds Car Audio Club ******************* If It Don't Read 150+ it Ain't Loud......
Posts: 289 | From: Howell, MI | Registered: May 1999
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posted
Good point, my home sub is ported on the back and fires down. Interesting. I'll try it and see how it works. Can always start over again and report!
Any comment on the calculations?
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Posts: 185 | From: Dijon, France | Registered: Jun 1999
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posted
There's nothing wrong with a port on the side, it only opens up the possibilities of weird response problems, but this occurs most with the vent on the back, opposite thw woof. Just do it.
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And that's the bottom line, cuz: LORD DUKK SAYS SO!
The Big Show The Dukk says: Know your bass: PORT your damn box!! Have HoleSaw, Will Travel!
posted
Cool. I was planning on porting at 30 Hz. Is this too low, or should I be higher at 40 or so? Want it to slam without sounding like crap. I guess, what are the drawbacks of low tuning frequencies?
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Posts: 185 | From: Dijon, France | Registered: Jun 1999
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