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### Speaker Crossover Chart and Capacitance vs. Frequency Calculator(High-pass)

 Highpass Filter To determine the crossover frequency a certain amount of capacitance will give you, use the formula:0.159/(C x Rh) = F Explanation of TermsC - is the capacitance value (in Farads) - to convert to Farads divide the value shown on the side of the cap in uF by one million.Rh - is the impedance of the load (speaker) you will be using.F - is the crossover frequency you will get.

 by frequency Crossover Frequency (Hertz) Capacitance uF (microFarad) 8 Ohms 4 Ohms 2 Ohms 80 248.44 496.88 993.75 100 198.75 397.50 795.00 120 165.63 331.25 662.50 150 132.50 265.00 530.00 200 99.38 198.75 397.50 280 70.98 141.96 283.93 400 49.69 99.38 198.75 600 33.13 66.25 132.50 800 24.84 49.69 99.38 1000 19.88 39.75 79.50 1200 16.56 33.13 66.25 2000 9.94 19.88 39.75 4000 4.97 9.94 19.88 5000 3.98 7.95 15.90 6000 3.31 6.63 13.25 8000 2.48 4.97 9.94 10000 1.99 3.98 7.95 12000 1.66 3.31 6.63

 by capacitor Capacitance uF (microFarad) Crossover Frequency (Hertz) approximate 8 Ohms 4 Ohms 2 Ohms 2.2 9034 18068 36136 3.3 6023 12045 24091 4.7 4229 8457 16915 6.8 2923 5846 11691 10.0 1988 3975 7950 22 903 1807 3614 50 398 795 1590 100 199 398 795 200 99 199 398

 Calculate for any Value To use this calculator, enter the amount of capacitance you have available in the first box. Then enter the impedance of the speaker you will be using with this filter in the box below that. Finally, click the "Calculate It" button to see the frequency this filter will be -3 dB. Capacitor =  uFRh = Ohms Answer =  Hertz

 Capacitors in Series/Parallel To use this calculator, enter the amount of capacitance in the first two boxes, they can be different values - this is how you obtain the odd values in the charts above. Then pick a series or a parallel connection. Now, click the "Capacitance" button to see the resulting value. Capacitor 1 =  uFCapacitor 2 =  uF ConnectionParallelSeries Answer =  uF

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