the wave length of a 20Khz signal is in the 150 meeter band, so the speaker cone can't move to the length of the sound wave. That in itself is confusing to me, because a tweeter cone on average will only move 0.03 mm. but from what you said it gives me a direction on how to calculat the average...
we measure amplifier output in watts, and speakers in db spl which is logrimithic to the power applied, so if I have a 4 ohm speaker that will create 91 db of spl when 2.83v is applied how much work is done?
Watts = V^2/R = W=2.83^2/4 = W=8/4 so W= 2 this is the power applied to the...