WinISD Help - Realm of Excursion



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Old 08-22-2014   #1 (permalink)
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Default WinISD Help

I have a question about WinISD. I need help from very experienced users. My question is about vent velocity. I usually keep the vent velocity between 17 and 19 m/s because every resource I've read has recommended that as an optimal number. I have had good results with this method. However, sometimes it seems like the port is too large to achieve that velocity. I know some subs prefer smaller ports to have a means of cone control. Does anyone have advice on achieving proper vent mach and port area? I figure a formula using the subs xmax would be the most accurate method to determine port surface area, but I've founding nothing out there.
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Old 10-31-2014   #2 (permalink)
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Default Re: WinISD Help

bump...
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Current: Incriminator Death Penalty 12D2 on Skar SK-1500, 2ft^3 tuned 35.5hz
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Old 10-31-2014   #3 (permalink)
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Default Re: WinISD Help

I can't remember but there is a simple calculator on an audio site that will tell you.

WinISD the wrong formula or theory to calculate that along with practically everything else to applicable for a vehicle.

It assumes port area needs to be larger higher the frequency when it should be the opposite.

There is\can be a debate as to which theory or formula is correct but most tend to believe larger port area is recommended for lower tuning, not higher.
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