start with rewiring it.. easier than taking the time to diagnose what's wrong with it, and if it doesn't work, you'll narrow it down to the amp itself, not your wiring

is this solved yet or no? please advise will track

check the power and ground wires going to the amp

check the entire length of both for faults...the power line could be shorting out...though it should blow the inline fuse if it is

the reason why your amp is getting power when the car is off is because it is wired independently of the car wiring, besides the head unit trigger

you could check the trigger wire (the one connecting your head unit to your amp...not the rca cables)...it could have shorted out

also check the wires going to the sub...if they crossed or shorted somewhere, then that could have caused a problem with your amp

you're basically going to have to check all the wires going to the amp until you find which one is shorting out

that would be my best guess anyways

lol like i said.. check the wiring

lol, dude, I've seen people overlook this 10000 times, Check the fuses on the amp and fuse block.

Start with fuses for sure. After that go to the wiring.

If it's still not working, see if you can try a different amp to see if the amp is messed up.

Dont listen to these kids saying check the fuses.

If a fuse is blown it WILL NOT get any power and she clearly said its CONSTANTLY getting power.

sounds like an un plugged wire somewhere