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Car Audio / Passive Crossovers, 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.

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

Passive Crossovers:
• Low Pass Filters
• High Pass Filters
• Band Pass Filters
• Narrow Band Pass Filters
• Acoustical Output & Power
• First Order Filters
• Second Order Filters
• Third Order Filters
• Zobel
• 2 Ohm Charts
• 4 Ohm Charts
• 8 Ohm Charts
• Formulas & Calculators

Car Audio:
• Glossary
• Ohm's Law
• Passive Crossovers & Calculators
• Metra Application Guides
• Power and Ground Cable Sizes
• Subwoofer Enclosures & Calculators
• Subwoofer Wiring
• the12volt's Application Guide
• the12volt's Install Bay (forums)
• Thiele - Small Parameters
• Tools & Equipment

Capacitor and Coil Calculator

Impedance	Frequency

Ohms	Hertz (Hz)

1^st 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)

2^nd Order (12 dB per Octave) (diagrams)

L2 = L1 x 1.414

Coil - L2

Millihenries (mHy)

C2 = C1 x .707

Capacitor - C2

Microfarads (�fd)

3^rd 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 >>

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

Passive Crossovers:
• Low Pass Filters
• High Pass Filters
• Band Pass Filters
• Narrow Band Pass Filters
• Acoustical Output & Power
• First Order Filters
• Second Order Filters
• Third Order Filters
• Zobel
• 2 Ohm Charts
• 4 Ohm Charts
• 8 Ohm Charts
• Formulas & Calculators

Car Audio:
• Glossary of Terms and Definitions
• Ohm's Law
• Passive Crossovers & Calculators
• Metra Application Guides
• Power and Ground Cable Sizes
• Subwoofer Enclosures & Calculators
• Subwoofer Wiring
• the12volt's Application Guide
• the12volt's Install Bay (forums)
• Thiele - Small Parameters
• Tools & Equipment


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Basics • Car Audio • Car Security • Cruise Controls • Diodes • Door Locks • Ohm's Law • Passive Crossovers • Relays • Resistors • Subwoofer Enclosures

Application Guides • Calculators, Charts, Diagrams • Downloads • Find Installers • Forums • Glossary • Subwoofer Wiring • Tools • Vehicle Wiring

Active Forum Topics

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