Car Amplifier Speaker Wattage Calculator

This tool calculates the total power consumption of a set of speakers. It also gives the car amplifier requirements to drive these speakers.

Enter the wattage of the speakers with each value separated by a comma.

Example Calculation

If you have three 75 W speakers, the total wattage is 225 W. These speakers require an amplifier capable of producing between 202 and 270 Watt.

When looking at the manufacturer’s data sheet specifications, use the RMS power and not peak power.

Can I drive my speakers with a lower wattage amplifier?

Yes you can. The downside is that you won’t be able to maximize the performance of the speaker. Remember to ensure that the amp is not operating at levels where distortion or clipping can occur. This will reduce the risk of damaging the speaker due to a higher average power.


[1] How much amplifier power do I need for my speakers?

Related Calculators

Car Amplifier Power – Find the output power of an amplifier as a function of its output impedance and that of the speaker.

Amplifier Speaker Matching – Gives the output power from an amplifier to hit a target Sound Pressure Level within a car.