Originally posted by SumAccordGuy94
maybe you killed the alternator... if it was weak when you installed the stereo, the amp would just finish it off...
Start the car, and disconnect the battery... if the car dies, the alternator is bad.
Other than that, it kinda sounds like there is a drain somewhere... thats the only way a battery would die in 6 hours.
kinda hard to start a car with a dead battery.
is the battery dead as in gone, or have you not gotten a chance to jump it yet?