Weird Electrical Problem, so frustrating... Options

[tonytutino]

All of this started when i got my amp/sub put in last month on the 19th. (Its a 800w amp powering a JL 12inch W3) Well, a couple weeks ago i noticed my battery didn't want to seem to hold a charge and eventually it just quit. So i bought a Duralast Gold battery from Autozone on the 16th of December (having them test my alternator too which worked fine) and it worked great up until today. It just was dead when i tried to start it. Didn't leave any doors open, lights on, etc. so i took it back thinking it was just a bad battery, well they replaced it and tested my alternator again and everything checks out... As soon as i got the new battery i drove 15 minutes to work and that was it. i come out 8 hours later and its dead AGAIN!
I have no clue whats wrong... even if the alt. was bad, i don't see how driving just a few minutes on a battery would drain it... anyone know whats up?

[tonytutino]

thanks for the info guys, i thought the same thing about my amp. i pulled the fuse from the engine bay so hopefully this could solve the problem. but i am 90% sure my amp turns itself off because you can see the blue power light glow reflecting in the hatch glass and it turns off when the car does..

however, i didn't hook up my amp/sub i had a shop do it just cause i'm a newb when it comes to electronics.