Sound Maths Ohm's Law Helpful Sound Uses Mains AC Current Draw I = P/E 8.3A = 1000W / 120V Speaker Power Draw P = E^2 / R 100W = 28.3^2 / 8 ohms Speed of Sound 1m/3ms (1.1 ft/ms) parallel speaker impedance 1/((1/z) + (1/z) + (1/n)) ex. 3 @ 8 ohm speakers 1/((1/8)+(1/8)+(1/8)) 1/(3/8) 2.666 ohms
