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Dayton passive radiator design
Dayton passive radiator design
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Old 13th October 2019, 06:24 PM   #11
hitsware is offline hitsware
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Hmm, ~72 Hz driver, ~ 38 Hz PR means it auto tunes to 38 Hz, hence a very poor match to the driver. Might as well make the tube 10x Vas and seal it for IB.
GM
Hmm ,
Maybe not quite IB , and I wanted smaller , but 2 ' ain't that bad :
You think the PR couldn't be adjusted enough ? :
DMA80-PR 3" DMA Series Passive Radiator Specification Sheet
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Last edited by hitsware; 13th October 2019 at 06:31 PM.
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Old 13th October 2019, 06:53 PM   #12
GM is offline GM  United States
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??? Not following? PRs have an Fs that can't be raised, only lowered by adding mass.

GM
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Old 13th October 2019, 07:49 PM   #13
hitsware is offline hitsware
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DMA80-PR 3" DMA Series Passive Radiator Specification Sheet

There's a wing nut on the bottom (top?) that supposedly adjusts mass .
( It would have to be ' effective mass ' or another parameter with equivalent results )

" Rear mounted threaded post allows easy mass adjustment for custom tuning "

Unless they mean use it to add washers for weight or ?
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Last edited by hitsware; 13th October 2019 at 08:01 PM.
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Old 13th October 2019, 09:27 PM   #14
GM is offline GM  United States
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That's normally the deal, i.e. there's none to remove, though some early kits have been known to include a bag of the recommended maximum added weight.

GM
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Old 16th October 2019, 01:56 AM   #15
kd1yt is offline kd1yt  United States
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I bought and utilized some of the Dayton 2" passive radiators, and with those they arrived with the wing nut holding three washers on the back of it, so one could subtract washers from 'stock' and also have room to add more, or larger, washers to add more mass than stock. Tend to assume that the design might carry over to at least some of the other Dayton PRs
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Old 16th October 2019, 02:09 AM   #16
hitsware is offline hitsware
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Originally Posted by kd1yt View Post
I bought and utilized some of the Dayton 2" passive radiators, and with those they arrived with the wing nut holding three washers on the back of it, so one could subtract washers from 'stock' and also have room to add more, or larger, washers to add more mass than stock. Tend to assume that the design might carry over to at least some of the other Dayton PRs
Would you share your design ?
Did you do any sims or ?
I've been trying this :
HiFi Loudspeaker Design
And can't arrive at anything realistic .
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