Vent size

inrank · 12th March 2009, 06:20 PM

Are there any differences in port size (diameter), shape and number?
(if they are all tuned to the same freq as below...)

So one big one (100mm) vs two smaller ones (60mm) vs a slot version

Thanks

leadbelly · 12th March 2009, 06:42 PM

Your question seems to be answered by the balance of your post. What are you really asking?

inrank · 12th March 2009, 06:58 PM

sorry, re reading it, makes no sense.

I meant to add, does it make any difference with the types of vent? air flow/'chuffing'/noise etc...

Ron E · 12th March 2009, 11:45 PM

Generally the lower the velocity, the better. I wouldn't trust the vent mach calc in winisd beta. If those vents are all tuned to the same frequency then the shortest vent has the smallest area and should have the greatest vent mach. Winisd pro alpha is a bit better. Unibox (requires Excel) is better than either, IMO.

12th March 2009, 06:20 PM	#1
inrank diyAudio Member Join Date: Oct 2005	Vent size Are there any differences in port size (diameter), shape and number? (if they are all tuned to the same freq as below...) So one big one (100mm) vs two smaller ones (60mm) vs a slot version Thanks

12th March 2009, 06:42 PM	#2
leadbelly diyAudio Member Join Date: Dec 2002 Location: Calgary, Alberta	Your question seems to be answered by the balance of your post. What are you really asking? __________________ Aerodynamics are for people who can't build engines. Enzo Ferrari

12th March 2009, 11:45 PM	#4
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	Generally the lower the velocity, the better. I wouldn't trust the vent mach calc in winisd beta. If those vents are all tuned to the same frequency then the shortest vent has the smallest area and should have the greatest vent mach. Winisd pro alpha is a bit better. Unibox (requires Excel) is better than either, IMO. __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan

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12th March 2009, 06:58 PM	#3
inrank diyAudio Member Join Date: Oct 2005	sorry, re reading it, makes no sense. I meant to add, does it make any difference with the types of vent? air flow/'chuffing'/noise etc...

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