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Old 06-15-2012, 11:32 PM
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Default Rule of thumb on width of port.

Whats the rule of thumb on width of a slot port for 2 12" subs running roughly 1000w each? Dropping the tuning without making the port width tiny is proving a challenge.

Last edited by davidrforbus; 06-15-2012 at 11:47 PM.
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Old 06-15-2012, 11:33 PM
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try making the heighth smaller ??
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Old 06-15-2012, 11:46 PM
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Originally Posted by davidrforbus View Post
Whats the rule of thumb on width of a slot port? Dropping the tuning without making the port width tiny is proving a challenge.

What are you asking exactly? There isn't a "rule of thumb" it all depends on the equipment.
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Old 06-15-2012, 11:47 PM
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What are you asking exactly? There isn't a "rule of thumb" it all depends on the equipment.
Your right should have been more clear. Edited.
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Old 06-15-2012, 11:52 PM
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Default rule of thumb

The only real "rule of thumb" is port area 12-16 sq in per cubic foot. Make the box bigger and the port longer and wider remember to calculate port volume into you equation. I usually work backwords and calculate my port volume then design my box and make the port fit.Edit: if your using 2 subs it is much easier to accomplish this with a common chamber the only drawback to this is if one of the subs takes a crap the other sub could be damaged as well.
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Old 06-15-2012, 11:53 PM
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Originally Posted by davidrforbus View Post
Your right should have been more clear. Edited.

The edit is better but knowing the actual equipment is necessary. If you have low excursion 12's you will need less port area, high excursion drivers would need more.
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Old 06-15-2012, 11:55 PM
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Originally Posted by snyderd758 View Post
The only real "rule of thumb" is port area 12-16 sq in per cubic foot.
I really dislike this "rule of thumb"
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Old 06-15-2012, 11:57 PM
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Originally Posted by Ricksi30 View Post
I really dislike this "rule of thumb"
whys that lol ??
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Old 06-15-2012, 11:58 PM
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Originally Posted by Ricksi30 View Post
The edit is better but knowing the actual equipment is necessary. If you have low excursion 12's you will need less port area, high excursion drivers would need more.
Damn, They are high excursion drivers, OA-12's.
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Old 06-15-2012, 11:59 PM
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Originally Posted by o 16K o View Post
whys that lol ??

Because if you understand how a port works you would know that enclosure volume is not the deciding factor in what size your port should be.
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