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<blockquote data-quote="galacticmonkey" data-source="post: 6974498" data-attributes="member: 570857">This is what I know:<ul>
<li data-xf-list-type="ul">Sealed chamber determines power handling, somewhat response. 
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<li data-xf-list-type="ul">Ported chamber determines efficiency, also has to do with how steep the cutoffs are. 
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<li data-xf-list-type="ul">Bigger the port, the better, to an extent. Anywhere up to around 30in^ of port per cubic foot of ported airspace works great for SPL and setups where you are looking for good numbers. Less control of cone. 
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<li data-xf-list-type="ul">Smaller the port, the more gradual the roll off points, but with less efficiency. 
</li>
<li data-xf-list-type="ul">Basically I try for a roughly sized sealed chamber, and then build the ported chamber as big as possible usually. Can be different based on the subs or the desired sound, but Ive done some pretty crazy ratios, like 1:4-1:5 and they always sounded great with a nice peak right where I wanted it. 
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</ul>Its all give and take. Each part does its own thing, but is affected by the others. It really is more than the sum of its parts. They are pretty easy to design and get to sound good. As long as the ported chamber is in the ballpark area of what it needs to be, the sealed chamber makes it hard to mess up too bad.</blockquote>

[QUOTE="galacticmonkey, post: 6974498, member: 570857"] This is what I know: [LIST] [*]Sealed chamber determines power handling, somewhat response. [*]Ported chamber determines efficiency, also has to do with how steep the cutoffs are. [*]Bigger the port, the better, to an extent. Anywhere up to around 30in^ of port per cubic foot of ported airspace works great for SPL and setups where you are looking for good numbers. Less control of cone. [*]Smaller the port, the more gradual the roll off points, but with less efficiency. [*]Basically I try for a roughly sized sealed chamber, and then build the ported chamber as big as possible usually. Can be different based on the subs or the desired sound, but Ive done some pretty crazy ratios, like 1:4-1:5 and they always sounded great with a nice peak right where I wanted it. [/LIST] Its all give and take. Each part does its own thing, but is affected by the others. It really is more than the sum of its parts. They are pretty easy to design and get to sound good. As long as the ported chamber is in the ballpark area of what it needs to be, the sealed chamber makes it hard to mess up too bad. [/QUOTE]

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