Work out speaker impedance matching instantly with clear inputs, formula shown and shareable results.
Parallel speakers divide the impedance by their number, series wiring multiplies it, and series-parallel pairs give twice the driver impedance divided by the number of pairs. Amplifier output roughly doubles as impedance halves, which is why wiring four 8 ohm speakers in parallel presents a 2 ohm load that many amplifiers cannot survive.
Parallel load
total = impedance / number of speakers
Series load
total = impedance x number of speakers
total = impedance / number of speakers. Parallel speakers divide the impedance by their number, series wiring multiplies it, and series-parallel pairs give twice the driver impedance divided by the number of pairs.
Amplifier output roughly doubles as impedance halves, which is why wiring four 8 ohm speakers in parallel presents a 2 ohm load that many amplifiers cannot survive.
Enter number of speakers, impedance of each speaker, wiring, amplifier power at 8 ohms. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.