There is not a zero OHM circuit, though. I=E/R so if R keeps getting lower, yes, CURRENT keeps going UP based on “R” and the amp WILL blow up if R is too low. This is why low impedance speakers are a bear to drive and worse, if they have reactance on top of it. Reactance steals away the vector magnitude of the RESISTIVE vector, making it “smaller” or shorter in the vector math. This make the current go UP even more.
Here we see the standard POWER cheat sheet. Notice that the “apparent” power is the LONGER vector, or hypotenuse. But, we can’t use all that as it is REACTIVE, so we see that ONLY the bottom vector, the ACTIVE power is used. This is weird, I know but I don’t make this up, I’m not able to be this weird. If we applied ALL reactive power to a motor, it would NOT MOVE! Only when it is REAL vector can it do WORK. Notice the ACTIVE POWER is also called I*R, or watts. But, is is REDUCED by the COS of the Apparent Power we can’t use yet. This is what’s happening in our speaker and amplifier.
Nothing is free and we trade currency for voltage and voltage for current in an amp. The watts remains the same as it is a multiplicand of the amps x volts.
Best,
Galen Gareis