>> A square wave has twice the power of a sine wave of identical amplitude. > 1.41 x Yes, for a voltage of x, but remember that the speaker is a resistance, f

>> A square wave has twice the power of a sine wave of identical amplitude. > 1.41 x Yes, for a voltage of x, but remember that the speaker is a resistance, for which the power varies as x^2/r (Ohm's law: p = e^2/r), So the original claim is correct.