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Small vented subs tuned low
Small vented subs tuned low
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Old 29th January 2013, 10:22 PM   #11
turbodawg is offline turbodawg
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Join Date: Feb 2004
Originally Posted by OscarS View Post
That's interesting indeed, because with a worst-case 2.5 ft│ and a 2.5"*15"*24" physical port gives me a standard tuning of 35hz. 27.5" gives me 33 Hz tuning. I am using Akabak to model. I would actually expect to see your box with no higher than 30Hz Fb. Would be interesting to see an actual impedance sweep of your box.
I'm using hornresp and winisd. If I get around to it in the next day or so, I can pull up the models and double check the numbers.
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Old 30th January 2013, 05:55 AM   #12
▀art West-VL. is offline ▀art West-VL.  Belgium
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Join Date: Jun 2005
Location: West Vlaanderen
Originally Posted by Don Hills View Post
One solution for when ports become too large for the enclosure:

Long port options for subwoofers
Too long ports might have their first port resonance in the band you want to use them.
I aim at a 1st port resonance of at least double the highest frequency I want to use the sub.
So if a sub has to do 18hz - 80hz, I design the first port reonance to be at least 160hz.
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