posted
I was wondering is there any equation for figuring the frequency of a port, and if there is a equation for tuning ports to a specific frequency.
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Posts: 216 | From: Hermitage, PA | Registered: Feb 2001
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R is the radius of the port in inches Vb is the volume of the box in cubic inches Fb is the tuning frequency of the box in Hz L is the length of the port in inches
You can use this equation to find length and if you have all except one variable, you can find that variable by rearranging the equation. Any questions?
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The goal: Accurate musical reproduction in the mobile environment
Posts: 3957 | From: State College, PA | Registered: Sep 2000
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posted
Not too bad...Have you seen the one on JL's site? That was oodles of fun - especially when I programmed it into my ti-82. It's nice though, plug in 3numbers and the 82 spits out a tuning freq. Here's a link to the JL tuning site: http://www.jlaudio.com/tutorials/ports/index.html
posted
Hey,i have 2punch powerdvc with 4lanzaropti drive 2500,can somebody help me with the dimensions from the port and enclosure?I have now an enclosure with 120liters with 2ports of diameter 10cm and a lenght of 12cm(score 154.2db)
posted
2*15inch,its just for dbdrag Today,we have tried an enclosure with 240liters with 2*aeroports diameter 16and 30cm lenght..the result 0.4db less. (the volume i have just write is the volume for the 2 drivers)
posted
With that size enclosure and ports with those dimensions you were tuning fairly low, close to 35 Hz. I say try using the same ports, but shorten the length to about 13 cm. That should bring your tuning up to about 45 Hz and make a much larger peak in the response. Just don't play the subs below the tuning frequency (45 Hz), or you may risk blowing them out. I'd say try a 55-60 Hz tone and see how you do.
------------------ rybaudio@freeze.com
The goal: Accurate musical reproduction in the mobile environment
Posts: 3957 | From: State College, PA | Registered: Sep 2000
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quote:Originally posted by Rybaudio: Yes there is. Here is the equation:
((14630000 x R^2) / (Vb x Fb^2)) - 1.463R = L
R is the radius of the port in inches Vb is the volume of the box in cubic inches Fb is the tuning frequency of the box in Hz L is the length of the port in inches
You can use this equation to find length and if you have all except one variable, you can find that variable by rearranging the equation. Any questions?
posted
It is a Muskellunge, better known as a muskie. They don't live down in your area (NM), due to the warmer climate. Tiger muskies may be in resivoirs a little ways north of you though. Do you have pickerel in your area? If so, this fish is in the same family (esox), looks similar, but gets much bigger. Do you do a lot of fishing?
------------------ rybaudio@freeze.com
The goal: Accurate musical reproduction in the mobile environment
Posts: 3957 | From: State College, PA | Registered: Sep 2000
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