This calculator determines the total effective resistance of **any number** **of subwoofers in parallel and in series**.

**Parallel connection**

Enter the resistance or impedance values (in Ohms) separated by commas.

**Parallel Resistance Formula**

**R _{total} = (1/R_{1} + 1/R_{2} + 1/R_{3 }+…. + 1/R_{n})^{-1}**

**Example Calculation**

Consider four subwoofers in parallel with the following resistance values: 1 Î©, 6 Î©, 15 Î© and 100 Î©. The total effective resistance is 0.80 Î©.

If you have two subwoofers – one having large and the other small resistance values in parallel, the effective resistance is closer to the smaller value. Take for instance 1 Î© and 100 Î© in parallel. The effective resistance is 0.99 â‰ˆ 1 Î©.

**Series connection**

Enter the resistance values separated by commas.

**Series Resistance Formula**

**R _{total} = R_{1} + R_{2} + R_{3 }+…. + R_{n}**

**Example Calculation**

Consider four subwoofers in series with the following resistance values: 1 Î©, 4 Î©, 10 Î© and 12 Î©. The total effective resistance is 27 Î©.