Find amplifier watts from output voltage into a speaker impedance.
Rms power into a load is the output voltage squared divided by the impedance, while peak voltage is 1.414 times the rms value. Stated wattage only means something at a real impedance and distortion figure, so checking the math reveals an amp's honest output.
Amplifier Power
Power = voltage^2 / impedance
Power = voltage^2 / impedance Rms power into a load is the output voltage squared divided by the impedance, while peak voltage is 1.414 times the rms value.
Stated wattage only means something at a real impedance and distortion figure, so checking the math reveals an amp's honest output.
This calculator takes 3 inputs: Output voltage, Speaker impedance, Measured at. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.