Alphasonik FW1032 Gebruikershandleiding - Pagina 10
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Calculating speaker enclosure volume is a five step procedure.
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(Make sure you do not forget to subtract the thickness of the wood and
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port displacement that you used.)
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Step One: Measure Height
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Step Two: Measure Width
Step Three: Measure Depth
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Step Four: Height x Width x Depth
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Step Five: Divide the results that were in step four by 1728
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12" x 12" x 12"= (1728 / 1728 = 1.0 cu ft.)
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Complete formula should look like this
Height x Width x Depth / 1728 = ___________
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Below are illustrated versions of all the steps that you should take.
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(FOR EXAMPLE ONLY)
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Step One
Step Three
Side View
7"
15-1.5=13.5
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4"
4.5"
The wood that we are using is 0.75" thick
The 1.5 that you see in the formula is the thickness
of the wood.
To calculate the thickness of the wood.
Left + Right=1.5
Top + Bottom=1.5
Front + Back=1.5
0.75 X 2 = 1.50
21.5 x 13.5 x 12=3483
13.5"
3483 / 1728=2.01
2.01 cu. ft. is the result for this enclosure.
15"
Formula to calculate port displacement
3.14 x Radius x Radius x Depth=
________ / 1728=port displacement
3.14 x 2.25 x 2.25 x7=111.27 sq. in.
111.27 / 1728=.06 is the displacement of the port
2.01 - 0.06=1.95 cu.ft. is the final result for this
enclosure.
21.5"
23"
Step Two
23-1.5=21.5
13.5"
12"