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<blockquote data-quote="theCybe" data-source="post: 629968" data-attributes="member: 558105">Two scenarios, progressively less original //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifBy the way:1)&nbsp; Is there an advantage to using multiple ports in a single chamber to achieve a desired &#039;tune&#039;?&nbsp; Is this somehow mathmatically preposterous?2)&nbsp; In a box with multiple subs, multiple chambers;&nbsp; Is it rediculous to have each chamber tuned an increment higher than the next?My thought process suggests this would help fill out whichever area lacks;In other words, the range lost in a 20Hz tune would be covered by a seperate chamber tuned at 30, 40, etc.I&#039;m aware of the bottoming out concept, whereas there is insufficient resistance in a, say, 60hz tune for a 30Hz note;&nbsp; Aside from that, seem reasonable?&nbsp; Are there some cancellation issues I&#039;ve missed?3)&nbsp; Passive radiators;&nbsp; ?&nbsp; A cone assembly without a driver;&nbsp; Understood;&nbsp; but the application / benefits / math involved to use that?4)&nbsp; Membrane;&nbsp; A clothed port;&nbsp; What does this entail / achieve?Can&#039;t wait to see these replies =)</blockquote>

[QUOTE="theCybe, post: 629968, member: 558105"] Two scenarios, progressively less original [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] By the way: 1) Is there an advantage to using multiple ports in a single chamber to achieve a desired 'tune'? Is this somehow mathmatically preposterous? 2) In a box with multiple subs, multiple chambers; Is it rediculous to have each chamber tuned an increment higher than the next? My thought process suggests this would help fill out whichever area lacks; In other words, the range lost in a 20Hz tune would be covered by a seperate chamber tuned at 30, 40, etc. I'm aware of the bottoming out concept, whereas there is insufficient resistance in a, say, 60hz tune for a 30Hz note; Aside from that, seem reasonable? Are there some cancellation issues I've missed? 3) Passive radiators; ? A cone assembly without a driver; Understood; but the application / benefits / math involved to use that? 4) Membrane; A clothed port; What does this entail / achieve? Can't wait to see these replies =) [/QUOTE]

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