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Cone excursion question

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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2021 at 6:58pm
Originally posted by JulianDA JulianDA wrote:

Did you think about the "elongation" of the Port by placing it on the ground? This can quickly result in a tuning that is a few Hz lower than predicted...I would also advise to only use winISD as a tool to get a rough estimation for portlength. Then build a prototype, measure the impedance and correct the portlength so it reaches your desired tuning. 

This ^^^


My last build had a factor 0,65 difference (+- expected) in regard to the winISD predictions. 
Eventually nothing beats practice.

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0krizia View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 0krizia Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2021 at 8:59pm
Does this mean that subs should not be stacked on top of each other? If the tuning frequency of a sub can be changed by the ground it is placed on, it should become phase issues when subs are stacked
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toastyghost View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toastyghost Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2021 at 12:14am
Originally posted by 0krizia 0krizia wrote:

Does this mean that subs should not be stacked on top of each other? If the tuning frequency of a sub can be changed by the ground it is placed on, it should become phase issues when subs are stacked


The short answer is put your subs where you have to. Fly them if you want, it doesn’t change the fact that the listener is very likely to be essentially ground plane.
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