How do I measure how loud a car audio system is?

How do i measure RMS on a multimeter so i can check out my sound system in my car?

  • Answer:

    Basically, multimeters (most anyway) can't measure RMS, or even peak-to-peak power, as most multimeters have functions for voltage, current, and resistance, and not power. To properly measure RMS power, you need a device called an oscilloscope, or o-scope for short. RMS (which stands for Root Mean Square) is a technique to measure average continuous power, and is roughly equal to 62% of the peak power (measured from the zero line to the maximum positive peak in the sine wave.

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