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]

yeah man i dont know what's going on. i have ruled out that my amp is drawing power because i unplugged the fuse for it in the engine bay and drove all the way up to lexington without it on. and it still died the next morning. and whats worse is that i'm stuck here because it snowed and the roads are heavily iced and my car won't start. bleh i'm starting to hate this car

how do you even go about checking for a draw?
Also, if the amp was hooked up improperly, even with the fuse pulled, could it still be drawing some kind of power with the amp off?