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# How to measure slot port length

Aug 21,  · -"The end correction of a ROUND vent is is equal to the internal diameter (Dv) of the vent. For example, a vent with an inside diameter of 2 incheswill appear to be 2 inches longer than its actual length (Lv)". -Pg That's all I have off the bat-lemme know if that helps. Measure the long side of one piece and the short side of the other. That way if you were to flip the bottom side of the L around they'd fit together correctly. (It doesn't matter how they cut and fit together either.) Hope this helps. Slot Port Length Calculator: To calculate the port length of a slot port, enter the width and height of the port, the box volume (Vb) in cubic feet, and the desired tuning frequency (Fb). Port Width: Port Height: Box Volume (Vb) Tuning Frequency (Fb) Port Length: inches: inches: cubic feet: hertz: inches.

## How do you measure the length of a slot port

This calculator will determine what length port to use in your ported enclosure. Sign up for a new account in our community. You need to be a member in order to leave a comment. Posted May 5, Fraction to Decimal Calculator.

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## Subwoofer Enclosure Calculators - Fraction to Decimal, Parallel, Series, Port Length, & Volume

By shizzzon , May 4, in Advanced Discussion. I want to make sure I calculate this correctly because apparently i am slightly off, either that or other manufacturers are off. When calculating port length, let's say it says to use 26" long and you are, for example, using I thought to calculate slot port length was to take the 26" depth and subtract from that the sqin radius by converting the sqin value to a circle then finding the radius, which in this case is 2".

That would then make the length 24" but when looking at manufacturer's giving you specs like a baby, either their calculations are wrong or i have been told wrong! IIRC you only take the half of the port height for slot ports. If you are using pvc piping, it's not really a slot port. Just remember to keep it atleast a port radius away from any other object the interior opening.

I still haven't found the actual formula but JL audio mentioned something about it. I believe they actually have the formula and i was just too tired to do the math. Anyway i found a calculator that will do it for you and yes, if you change the height and width and maintain the same sq in value, the length does change so it must be accurate. This calculator that i posted above, let me give you guys the info and answers it's givin me because somethin is "odd" about this-.

As mentioned earlier, the height of the slot port effects the acoustical length so i reversed the dimensions-. Both calculations are the same really, it's just the port is turned to it's side in the 2nd one So you see, both scenarios max out height and depth this is width for the port in 2nd calculation.

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For additional subwoofer wiring options, please see our Subwoofer Wiring Wizard. Your ad blocker is preventing this page from displaying correctly. Parallel Calculator Parallel Calculator Enter at least 2 values and up to 10 values to calculate the resistance of speakers or voice coils connected in parallel. Series Calculator Series Calculator Enter at least 2 values and up to 10 values to calculate the resistance of speakers or voice coils connected in series.

Round Port Length Calculator Round Port Length Calculator To calculate the port length of a round port, enter the diameter of the port D , the box volume Vb in cubic feet, and the desired tuning frequency Fb.

Here is the formula we use: Slot Port Length Calculator Slot Port Length Calculator To calculate the port length of a slot port, enter the width and height of the port, the box volume Vb in cubic feet, and the desired tuning frequency Fb.

Volume Calculator - Wedge Enclosures 1 Volume Calculator - Wedge Enclosures 1 Measure the outside dimensions of your enclosure and the material thickness, then enter the numbers below to calculate interior volume.

Volume Calculator - Wedge Enclosures 2 Volume Calculator - Wedge Enclosures 2 Measure the outside dimensions of your enclosure and the material thickness, then enter the numbers below to calculate interior volume.

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