C7, yes Ohm's Law controls here, but also keep in mind that when two speakers are playing the same sound that the sound level is increased by 3dB. To keep the same overall sound level as before each speaker can play 3dB less loudly, requiring only half as much power as before. The form of Ohm's Law that would analyze the current requirements in the situation is I(current in amperes)= [square root]P/R(power divided by resistance). For example, if a certain sound level required 32 watts with an 8 ohm speaker and to maintain the same sound level with two of them driven in parallel required 16 watts, the current required with one is [square root]32/8=2 amperes, and with two is [square root]16/4=2 amperes.
