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Port air speed. [message #35802]

Thu, 04 April 2002 11:34

dbeardsl
Messages: 127
Registered: May 2009

Master

Has anybody ever done some calculations on port air speed for some of the Pi Models? I just put the specs into a program called WinISD (a lot like boxplot). I gave me a Mach of .34 for Theater series Four Pi.

I have some large 3 ways which I just dropped the JBL M252-8B into. the port on this is rated at mach .24 and 32hz. When I play any kind of sine wave below 50 hz or so, the port is hideously wooshy, you can't hear it that much in normal music, though it's rather loud on some R&B.

The other PI models, like you said, are smaller cabinets with bigger ports, so it's not really an issue.

Has anybody tried a different port configuration, but with the same tuning?

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[Message index]

		Port air speed. By: dbeardsl on Thu, 04 April 2002 11:34
		try to avoid operation below Fs By: Sam P. on Thu, 04 April 2002 12:09
		Re: Port air speed. By: Wayne Parham on Thu, 04 April 2002 14:55
		we don't need no stinking subject. By: dbeardsl on Thu, 04 April 2002 23:07
		20Hz High pass filter By: Wayne Parham on Fri, 05 April 2002 00:10
		fanning air vs. imparting a compression wave By: Sam P. on Fri, 05 April 2002 10:05
		Re: Port air speed.IS BASED ON MAX POWER ON ISD By: mhammill on Thu, 04 April 2002 16:54

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