I want to calculate the peak voltage output of an audio amplifier when driving at its maximum rated power, a loudspeaker.
For example, an amplifier rated at 50W RMS into 8 ohms, driving an 8 ohm loudspeaker.
This wikipedia article tries to explain what RMS power actually means, but it's not clear. And I'm wondering if it's actually wrong where it says:
[RMS Power] is proportional to the RMS voltage
This seems wrong, since I know that the equation for power/voltage/resistance is:
Power = V^2 / R
So assuming that the amplifier does not distort, does not exceed 50W RMS and so on, what is the peak AC voltage it would output?