not true. a cooked sub will short an amp no problem. i just so happen to have a 4ohm c10a sitting right here that still plays(quietly, but clean)...... it only reads about 1ohm. however, once the magic smoke is released, the amp is damaged. also, an amp can short one, or one section of the outputs and still play with the other section(s), but have dc the whole time it is on, and that will cook subs in no time. how did you wire the coils? if they were single 4ohm, then you would be at 1.33 paralleled, if they were d4 or d2/s2 subs, then you would be far below the minimum impedance, and if it was a 2ohm stable amp, then you basically shorted the speaker output terminals.what model crunch amp? how was it wired?