1. The problem statement, all variables and given/known data Speaker Resistance = 10.4 Ohm R = 8.20 Ohm Maximum voltage of AC source = 15.0 V What's the average power transferred to the speaker? 2. Relevant equations P = [itex]I^2R[/itex] Imax = [itex]I/2^0.5[/itex] 3. The attempt at a solution I could the problem if there was only the speaker resistance. I don't understand how the other resistance comes into play or what it does in the circuit.