the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
car audioicon

Car Audio / Passive Crossovers, High Pass/Low Pass Capacitor & Coil Calculator

Use these formulas to calculate for first, second, and third order low pass, high pass, and band pass filters. Do not use these for narrow band pass filter calculations.

Before clicking for the crossover component values, enter the impedance level and the desired crossover frequency. Values should be rounded off to the nearest hundredth.

If you need a 16 mHy coil, you can series a 12.8 mHy coil and a 3.2 mHy coil. If you need a 70 fd capacitor, you can parallel two 35 fd capacitors.When the exact value of a coil or capacitor is not available, you can substitute values of ± 5%.

Crossover Calculators:
High Pass/Low Pass Calculator
Narrow Band Pass Calculator
Zobel Calculator

top of page Capacitor and Coil Calculator
Impedance Frequency    


Ohms Hertz (Hz)    
1st Order (6 dB per Octave) (diagrams)
L1 (mHy) = (1000 x Impedance) / (6.283 x Crossover Frequency) Coil - L1 Millihenries (mHy)
C1 (fd) = 1,000,000 / (6.283 x Impedance x Crossover Frequency) Capacitor - C1 Microfarads (fd)
2nd Order (12 dB per Octave) (diagrams)
L2 = L1 x 1.414 Coil - L2 Millihenries (mHy)
C2 = C1 x .707 Capacitor - C2 Microfarads (fd)
3rd Order (18 dB per Octave) (diagrams)
L3 = L1 x 1.5 Coil - L3 Millihenries (mHy)
C3 = C1 x .1.33 Capacitor - C3 Microfarads (fd)
L4 = L1 x .5 Coil - L4 Millihenries (mHy)
C4 = C1 x .667 Capacitor - C4 Microfarads (fd)
L5 = L1 x .75 Coil - L5 Millihenries (mHy)
C5 = C1 x 2 Capacitor - C5 Microfarads (fd)
<< Previous - Third Order Filters Next - Narrow Bandpass Crossover Formulas and Calculators >>



  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Friday, October 20, 2017 • Copyright © 1999-2017 the12volt.com Donate to the12volt.com Advertising Top of Page
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Donate to the12volt.com
Top
the12volt.com spacer
the12volt.com spacer