Thats maximum current draw, as in you will never see that much drawn unless you are playing sine waves with it turned all the way up, and if you are competing with 4000 watts you will have quite a few batteries and you charge them up before with your alternator. Daily driving you might be pushing up to 3000 watts if that and playing music does not use as much power as a sine wave.does anybody happen to know how many amps the colossus draws? the lanzar is said to draw almost 500 amps! the biggest alt for my car is 240 ampos.
he basically summed up what i said right there.Amp doesnt run at full draw all the time a 240 is more then enough.