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Topic: Port Size ? |
Bill Moran
From:
Virginia, USA
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Posted 22 Mar 2014 4:34 pm |
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What size and how many ports in a 20X20X12 15" speaker closed back cab ? 
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Bill |
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Jim Palenscar
From:
Oceanside, Calif, USA
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Donny Hinson
From:
Glen Burnie, Md. U.S.A.
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Posted 23 Mar 2014 8:48 am
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| I wouldn't put a 15" speaker in a closed-back cabinet that was that small. |
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Dave Grafe
From:
Hudson River Valley NY
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Posted 23 Mar 2014 9:49 am
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What Donny said.
The optimum size of port in a given cabinet depends first on the nature of the speaker itself, the enclosure then being designed around those parameters. As Donny mentioned, the small cabinet you describe is WAY small for a driver of that size.
Start here... https://www.google.com/#q=speaker+enclosure+design |
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Les Cargill
From:
Oklahoma City, Ok, USA
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Posted 23 Mar 2014 10:23 am
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Assuming you can get the Thiele-Small parameters for the driver:
http://www.linearteam.dk/?pageid=winisd
It will design the optimum cabinet for you. If you're stuck with an existing box, you can play with the parameters of the port.
The Galien-Kruger 1X15 bass cabs tend to be optimum; anything smaller than that and you'll lose sound. And you can't just port any cabinet to be optimum; ports can be overdriven.
This being said, you may not want optimum for steel. But you probably do.
Also
http://www.thielesmall.com/ |
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