The amp is damaged internally, the power is loose, the ground is loose, the control wire from the deck is loose.
Shorted voltage regulator,
Typically a poor ground, or some how the red wire is touching the black
I had th same problem i had to turn my amp down i guess it was to much power out put
AMP stands for alarm monitoring protection.
The number on a car fuse refers to the Ampage of that fuse , each electrical component on any car has its own or shared fuse with a certain Amp rating, they are normally colour coded too and are to be replaced with one of the same Amp rating for protection.
They are just protection from overpowering your amp. So if your amp has 2 fuses that say '20A', it can handle essentially 40 amps. So 14.4(V) x 40(A), they allow your amp to draw 576 Watts before they blow. 14.4(V) is considering your car is running and the alternator is good and strong.
u have an alternator problem whether the voltage regulator is gone or the diodes in alternator its self are shot
More than likely the alternator is defective. Have it tested at most auto parts stores.
you dont
Connect the light wires to the terminals on your amp that send the signal to your subwoofer.
You have the gains set too high on the amp.