It'll be a little higher, doubtful they'll get 80% efficiency at 1 ohm
or that the voltage will hang at 14.4V with that much extra load in the
car. Class D driving 1 ohm is usually in the high 60's to low 70% range,
and car voltage more likely 14V or less, so using 70% and 13.8V figure
the current is more like 155 amps.

Probably doesn't matter that much once you mix in the duty cycle of
whatever music is playing and the probability that the unit isn't being
driven at full power very often, even on peaks, as a daily driver anyway.

JD