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Loudspeakers Impedance Calculation

Simple Calculation for Loudspeakers in Parallel

If all the loudspeakers in parallel have the same impedance, then the calculation is easy. Simply divide the impedance by the number of loudspeakers in parallel.

Example 1: Four 8 Ohms loudspeakers in parallel: 8 divided by 4 = 2 Ohms.

Example 2: Two 4 Ohms loudspeakers in parallel: 4 divided by 2 = 2 Ohms.

Not So Simple Calculation for Loudspeakers in Parallel

For calculations involving loudspeakers in parallel with different impedance, the following formula is required (it can be used with loudspeakers of similar impedances too). Calculation for Loudspeakers in Series

If you have 2 (or more) loudspeakers wired in series, then simply add their individual impedance together. For example: A 4 Ohms loudspeaker in series with a 8 Ohms loudspeaker: 4 + 8 = 12 Ohms.

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