Welcome to Speaker Impedance. This website calculates the nominal impedance created with different combinations of wiring speakers together. Remember calculations are only to be used as a guide; in reality, the impedance will vary with frequency and more factors such as coil temperature come into play.

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Equation |
Wordy Equation |
Info |

V = I x R | Voltage = Current x Resistance | Ohm's Law. |

R = R_{1} + R_{2} +.. |
Resistance = Resist_{1} + Resist_{2} +.. |
Resistances connected in series add up |

1/R = 1/R_{1} + 1/R_{2} +.. |
1/Resistance = 1/Resist_{1} + 1/Resist_{2} +.. |
The reciprocal of Resistances connected in Parallel add up |

P_{A} = P_{Total} x R / R_{Total} |
Power_{of speaker A} = Power_{Total} x Resistance_{of speaker A} / Resistance_{Total} |
Calculates the power going to one speaker connected in series |